Sento Kiryu

This article is about a rider in Kamen Rider Build.

Template:Characterinfo

1 2 3 4 5 6 7 8 "Now, shall we begin the experiment?" ―Build's catchphrase before transforming[src] "Build Up!" ―Build's call whenever he changes forms[src] "The law of victory is set!" ―Build's catchphrase after finding the winning match[src] "This is the worst." ―Sento's catchphrase whenever things go wrong[src] "Well? Amazing, right? Terrific, right? I'm a Genius, right?" ―Sento praising his own work[src] "Best Match kita!" ―Build upon discovering a Best Match[src] "What do you think of my invention?" ―Sento whenever he's being a show off to someone.[src] "To protect something important...I will rise up as many times as necessary! That's the Build that we created!" ―Sento's unwavering resolve to protect the innocent.[src]

Sento Kiryu (桐生 戦兎, Kiryū Sento) is a genius theoretical physicist who experiments with Fullbottles to further enhance his abilities as Kamen Rider Build (仮面ライダービルド, Kamen Raidā Birudo) to fight against the evil Smash organisms. He is a man with no memory of his past, and fights to find the truth about himself. Initially believed to be someone named Taro Satou (佐藤 太郎, Satō Tarō), his true identity turned out to be someone else.

History

Early Life

Main article: Takumi Katsuragi

Sento was originally Takumi Katsuragi, a research prodigy at the Touto Institute of Advanced Matter Physics, and nicknamed the "Devil's Scientist". One of the founders of Faust, he was responsible for the creation of Smash, the Transteam System and the Rider System.

Katsuragi eventually had a change of heart and decided to quit Faust. Soichi Isurugi confronted him as Blood Stalk, only for Katsuragi to reply that he had hidden his research data to expose the group. As Stalk knocked out Katsuragi, a man named Taro Satou arrived at Katsuragi's home to apply for a drug-testing job, only to see Stalk and run in fear. Before Taro reached the door, Stalk killed him, and switched both men's faces and their clothes. Now with Satou's appearance, Katsuragi had his memory wiped by Stalk, and was injected with Nebula Gas.

When Katsuragi did not become a Smash after the injection, Isurugi realized that Katsuragi would be useful in gathering the rest of the Fullbottles. Isurugi smuggled Katsuragi out of Faust, making it appear that he found the amnesiac man outside of the café Nascita, Isurugi's home and front. Katsuragi was given the name Sento Kiryu and taken into Isurugi's care, hidden in the secret basement laboratory inside Nascita.

Becoming Build

Soichi gives Sento the Build Driver.

File:Buildfirsttransformation13.jpg

At some point after being taken in by Soichi, he was provided the Build Driver and a set of Fullbottles that Soichi "stole" from Faust. During Sento's first fight against a Smash, he fought hand-to-hand but was beaten to the point where he had no choice but to use the Driver. Upon his first transformation, Sento defeated the Smash and headed back to Nascita, where Soichi and Misora were waiting for him. From that day on, Sento would continue being Kamen Rider Build in order to one day uncover the mysteries surrounding his past.

The Rabbit Tank Meets Dragon

After about a year of fighting as Build, Sento had gained some notoriety as the Kamen Rider. However, Sento's search was left at a standstill, as the Smash had no memories of their own experiments upon returning to human form. Meanwhile, Soichi, growing impatient with Sento's freeloading, directed him to a mid-level job at Touto Institute of Advanced Matter Physics.

Sento's first lead came in the form of Ryuga Banjou, an ex-fighter and wanted fugitive. Alerted by Ryuga's Smash energy readings, Sento followed and eventually apprehended him. Much to his shock, Ryuga had just escaped from the labs where Sento had been experimented on, and had all his memories intact. The two were interrupted by Strong Smash, who attempted taking Ryuga away before Sento defeated it as Build. The Touto government quickly arrived and attempted to take Ryuga back into custody. Believing Ryuga's claim that he had been framed, Build helped Ryuga escape from the government, making Build a fugitive as well. ^{[That One with the Best Match]}

Burn Smash Incident and Meeting Night Rogue

Sento hides Ryuga in the secret lab, with Soichi scolding Sento for committing a felony. Sento explained that Ryuga was the 'best match' to his memories as they are both experimented by the same scientist group. On top of that, with exception of the location of the underground lab, Ryuga still had his memories intact. Sento deduced that Ryuga might lead him to the bat man and starts questioning him. Ryuga began the story with his birth, but Sento cut him off, stating not that far and scolded him, infuriating Ryuga and forcing him to shake Sento by the shoulders for insinuating him as an idiot. Sento told Ryuga to just start at the point of his arrest, and Ryuga told them what happened: he showed up at Katsuragi's apartment for a job, but he found him already dead at the same time the cops arrived. Isurugi objected jesterly, finding it strange for the local authorities to arrive just as Ryuga found the body, but Ryuga claims that what happened until a silver booth went off and opened a panel, unveiling the Gorilla Fullbottle. Sento runs toward it and gazed at the bottle before he commented the booth's work, which annoyed Misora as she came out and approached Ryuga, wondering who he was. As Sento theorized that the murder and Ryuga's jailbreak must have a connection until they were approached by Sawa Takigawa, a reporter. Both Sento and Isurugi were shocked as how Sawa found out about them, she showed Sento the Nascita matches set he dropped the night he saved her from the Needle Smash, and Isurugi realied he forgot to close the door behind after Sento brough Ryuga to the lab, but all four were completely unaware that Sawa was a spy for Faust and she knew the lab's entrance, grabbing a match set from a bowl to back up her cover. She then claimed to want to do a cover story on the Kamen Rider, but Sento declined until Isurugi agreed, much to the annoyance of Sento and Misora.

The next day, Sento, as Build, responed to a Smash alert, unaware it was a trap to lure him out by Faust. At the location, Build phones Isurugi to let him know there wasn't a Smash in sight until a squad of Touto Guardians appeared and open fire at Build. Build headed down near the edge of the docks and cancelled his transformation, pretending to be an average joe until the Guardians left. At the Touto Institute, Sento ran into Gentoku and a few researchers watching the news as they learned that Touto has declared the Kamen Rider as a fugitive until he received a phone call from Misora, whom informed him Ryuga escaped with her phone, both unaware that Ryuga learned that his fiancé, Kasumi Ogura, has been abducted by Faust as well. As Build, Sento tracked Misora's phone to an abandoned warehouse where Ryuga is being pursued by Touto Guardians. Utilizing a Vortex Break with his Drill Crusher gun mode and the Harinezumi bottle, Build asked Ryuga why he left, to which Ryuga stated he has a girlfriend he intended to marry. After defeating the Guardians in the warehouse, Build and Ryuga ran into more Guardians that've merged into their Union State and opened fire, forcing Build and Ryuga back into the warehouse. Inside, Build turns into the newly acquired Gorillamond Best Match and proceeded outside, formulating a plan to take down the Guardian Union State, which included knocking Ryuga's motorcycle inside an abandoned building, allowing the Guardian Union State to pursue. As the machine made it to the right spot as its gunfire destabilized the building, Build used the Muscle Glove to destroy the machine.

As they regrouped, Sento asked Ryuga about his fiance, whom revealed she was also the one whom sent him to Katsuragi's place for the job. As Sento asked why he didn't say anything, Ryuga punched him in the gut and put him in a choke hold, rendering him unconsciousness to prevent his involvement. However, Sento came to early and managed to catch up and was too late seeing that Kasumi was already transformed into the Burn Smash. As Night Rogue appeared, Sento turned into Build HarinezumiTank Trial Form and fought Rogue to demand answers for his experimentation, but Night Rogue responded that he can't remember every guinea pig Faust had, angering Build. Rouge send Build back with his Steam Blade, telling him he can't best him with a random bottle. As Build rose, he noticed the Burn Smash preparing to attack Ryuga and pushed him out of the way as the Smash blasted them with a fireball. As Build prepared to fight, Ryuga pleaded to not fight Kasumi, but Build assures him she can be saved once the Smash element has been extracted from her body. However, Rogue intervened and told them if they do that she dies as her Hazard Level is 1, meaning her body's weak and injecting it with the element is fatal as he takes his leave. Build attempts to engage the Smash, but Ryuga stops him until Build spotted the Smash attacking itself. Build stated that when a person becomes a Smash their soul disappears, but Kasumi's soul is still in the Burn Smash as it struggles to not attack Ryuga. Realizing that Kasumi cannot be saved, Build agrees to separate the Smash from Kasumi's soul long enough for Ryuga to say goodbye. first, Build turned into his RabbitSoujiki to absorb all the fire with the Long Range Cleaner, then released the fire with the Trash Converter to create a fire cyclone.

Turning into the GorillaMond Best Match, Build turned the fire into small diamonds and performed a Vortex Finish to place the Burn Smash in a diamond cyclone that separated it from Kasumi's soul. However, he used the Muscle Glove to keep the Smash at bay as he told Ryuga he couldn't do anymore. After Kasumi passed, Build tossed the Smash's body aside to finish the attack and absorbed the element in an empty bottle. As Sento told Ryuga to leave with him, Ryuga broke down with grief and said it's fine if he's incarcerated once more. Angered, Sento reminded him if the authority find him, he will still be branded as a criminal and Kasumi's life will have been sacrificed for nothing. They headed back to their motorcycles and left the scene. Back at the lab, Sento fell asleep as Misora purifies the Burn Smash bottle, unaware that Ryuga thanked him for letting him see Kasumi one last time until the booth was finished. Upon seeing the newly purified Dragon bottle, Sento tossed it to Ryuga, stating he should hold onto it and to thank Sento after he proved his innocence. Sawa appeared, informing Sento and Ryuga of the man who drugged Ryuga: Masahiro Nabeshima, the same man whom Kasumi mentioned before her death. Now with the connection between the murder and Ryuga's jailbreak, Sento planned to find Nabeshima. ^{[The Innocent Runaway]}

Mirage Smash and Blood Stalk

The next day, Sento explained to Ryuga that Nabeshima was responsible for using Kasumi to make Ryuga Katsuragi's muderer, but also drugging him and placed him in a Smash laboratory. Misora pointed out that finding him would be impossible as his resume was a fake, much to Sawa's sorrow. Misora offered to help find information on Nabeshima, but Ryuga appeared skeptical until Isurugi assured him not to underestimate Misora, whom was revealed to be a famous net idol called Miitan. In a matter of minutes, they've received information, but not the right kind: a Smash has appeared. Pausing the search, Sento sets out to intercept the Smash, but Ryuga questioned him whether being a Kamen Rider or finding Nabeshima, the person connected to the Smash and framing Ryuga, was important. Sento states Build is before leaving. Upon taking down the Flying Smash, Sento used the extracted essence to create the Taka Fullbottle. Meanwhile, having obtained Nabeshima's contact information, Ryuga began heading west to Seito with Sawa. Saving Ryuga from a group of Guardians, Sento advised him not to mistake justice for revenge before being attacked by the Mirage Smash. Build neutralized it only to find that the Smash was Nabeshima. Before he had time to react, he was poisoned by Blood Stalk and fell unconscious.

Sento awoke in Nascita's basement, having allegedly been saved by Isurugi.

to be completed

Uncovering Faust

Once again at a dead end, Sento decided to examine Katsuragi's research notes, finding a message to Katsuragi's mother Kyoka in the final one. Escaping another attack from Rogue and Stalk (mainly because Stalk's interference), Sento and Ryuga snuck to Hokuto to speak with Kyoka.

to be completed

Blood Stalk Revealed

"Just now...the Soichi Isurugi I knew died."

―Sento severs his ties with Soichi after learning his true nature.^[src]

On the night that Ryuga became Cross-Z officially, Sento was called by Nabeshima, who had regained his memories. Nabeshima revealed he had framed Ryuga on Stalk's orders, and that Isurugi was Stalk. Shaken by this discovery, Sento secluded himself in the basement until Isurugi returned. While reluctant to believe Isurugi was Stalk, Sento created counterfeit Fullbottles to be safe. When confronted with his odd behavior, Sento told them what Nabeshima told him, with the exception of Stalk's true identity.

To test Nabeshima's claim, Sento had Misora purify the Octopus Fullbottle in secret. On a tip from Gentoku, Sento and Ryuga raided a building for Nanba Heavy Industries, where the Pandora Box was being held. Confronted by Stalk, Build and Cross-Z were unable to match Stalk until Sento used the newest Best Match: OctopusLight. Unfamiliar with a Best Match he had never seen, Stalk was easily defeated, confirming Sento's suspicions. The Pandora Box was brought to Nascita, where the group celebrated with dinner. In the middle of the night, Isurugi snatched the Pandora Box, its panel, and the Fullbottle decoys. Before he could leave, Isurugi was confronted by Sento, who had been waiting for him upstairs. After initially running away, Isurugi admitted his ruse and transformed into Stalk to fight.

During the night battle, an essence of Paradox fell into one of Sento's empty bottles and decides to infuse it with the Best Match from a pair of 10 pairs existence after researching on how to use it, resulting on RabbitTank which would be infused after RocketPanda, GorillaMond, and LionCleaner proved to be failure with Ryuga to be the one who tested them all. Sento later challenged Isurugi again, almost to be defeated because of being reluctant until Ryuga came to his aid after distracting Misora by a sudden dating distraction plan from Sento. After Ryuga had lost instead, Isurugi told Sento and Ryuga that the Kamen Rider project is nothing more than a weaponry project and not for becoming heroes of justice. Isurugi also told Sento that he, Misora, and Ryuga were only pawns for the fruition of his plans. Angered, Sento used RabbitTank Sparkling, his completed upgrade, to defeat Stalk and take back the Pandora Box. Isurugi told Sento to search on Takumi's hidden project and claimed that Sento definitely able to finish it and telling that Night Rogue is Gentoku before bidding farewell.

Learning his Past

Sento and Ryuga promptly confronted Gentoku, attempting to get a confession. While Gentoku fought them both off, he advised Sento to look up "Sclash" in Project Build. This hint led Sento to the Sclash Project, the evolution of Project Build. In an excited frenzy, Sento finished the necessary computations within a night. Unbeknownst to Sento, this had been set up by Isurugi as he sneaked into his cafe and copied the data before leaving.

When Gentoku faced and lost against Rabbit Tank Sparkling, Gentoku revealed that Sento was actually Takumi and explained how everything had been set up by Isurugi from behind the scenes.

Overcoming his Guilt

"This sucks. Having you criticize me...I remember now. I...am a narcissistic-ego driven...hero of justice!"

― Encouraged by Ryuga, Sento regains his confidence as a Kamen Rider.^[src]

Sento became overridden with guilt due to Gentoku's words, working silently on the Sclash Driver. Ryuga rushes towards in front of him, knocking over the unfinished driver and addresses Sento that he's responsible for his girlfriend's death and all the people who became Smash. Sento demanded what Rygua wanted, and he replied to fight. As Ryuga gains the upper hand, Sento recalls past events that enforces his true identity as Takumi, until Ryuga notices he wasn't fighting seriously. Obliging to Ryuga's demand to fight for real, Sento changed into RabbitTank Sparkling and finished Ryuga with a Rider Kick. After the battle, Sento shows remorse for his crimes as Takumi and leaves a conflicted Ryuga with Misora watching on.

Hokuto Invasion

"I will stop you...even if I lose myself!"

―Sento before transforming to RabbitTank Hazard Form^[src]

Forced to stop the rampaging Cross-Z Charge, Sento used the Hazard Trigger to transform into RabbitTank Hazard. Despite his efforts, Sento was unable to stop Ryuga before the Hazard Trigger's effects took hold, sending him into a mindless rage. Sento easily took out Cross-Z Charge, Akaba, and Kiba before fatally wounding Aoba. Knocked out of his transformation by Grease (who arrived seconds too late), Sento regained consciousness to watch Aoba's death. 

Sento, losing his will to fight

The murder left Sento devastated and traumatized: he surrendered all of his Bottles to Touto's government and entered a near-catatonic state.

The next day, Sento was visited by Taizan to inform him about a proxy one on one battle to end the war between Touto and Hokuto for good. Sento had initially refused to fight, however meeting with Soichi changed his mind, having received all the Fullbottles in the possession of both Hokuto and Seito from him.

Sento began work to figure out all the Best Matches in his lab, much to Misora's sadness as she began to worry for Sento. Utsumi then appeared at the lab and reveals he was asked by Soichi to help Sento.

The night before the duel, Sento had created a kill switch for the Hazard Trigger and asked Misora to use it when Sento goes out of control.

More to come...

Personality

"Me and him...We fought to become strength for others. To protect people...we kept rising back up. Even without you...I still have people to protect. For the justice I believe in...I will defeat you!"

―Sento proving his justice to Blood Stalk.^[src]

Sento's outstanding traits are his intellect, narcissism, and sense of justice. A genius by all standards, Sento has repeatedly displayed advanced knowledge in physics, mathematics, chemistry, engineering, and cryptography. Sento's polymathism is accompanied by an inflated ego and sharp tongue: he likes to praise himself for his works, and often mocks Ryuga for his comparatively lower intelligence. When Sento gets excited (usually due to a discovery or breakthrough), a part of his hair sticks up.

Sento's greatest trait is his sense of justice. A firm pacifist, he believes that science should be used for the sake of humanity, and harshly opposes using it for war. His selflessness and sense of duty causes him to try and shoulder the burden alone rather than involve others, whether he can carry that burden or not. This altruism intensifies the guilt he feels for his role in creating the Smash and escalating the war. While generally calm and composed, Sento is prone to making poor judgement during emotional turmoil.

Sento has a couple of catchphrases. Before he transforms, he says "Now, shall we begin the experiment?" (さあ、実験を始めようか？, Sā, jikken o hajimeyou ka?). After transforming, he says "The law of victory is set." (勝利の法則は決まった, Shōri no hōsoku wa kimatta).

Powers and Abilities

• Hazard Level 4 Physiology: Sento underwent an experiment from Faust which injected him with a certain amount of Nebula Gas. However, instead of mutating into a Smash, the gas retained his body without side affects apart from memory loss (mostly inflicted by Blood Stalk). As result, his initial Hazard Level starts at Level 3, which allows subjects like him to utilize the Build Driver to transform into Kamen Rider Build. Later, his Hazard level rose to 3.7 due to his anger during the battle against Blood Stalk. After continuous usage of the RabbitTank Sparkling Fullbottle, his Hazard level rose to 3.9; and after continuous use of the Hazard Trigger, his hazard level is now 4.4 according to Blood Stalk.
• Genius-Level Intellect: Sento's most defining trait is his intelligence. He has an advanced knowledge of physics, and developed several of Build's accessories on his own.
  • Genius Physicist: Sento has an advanced knowledge of physics, having finished a difficult physics test with perfect results. This proves a significant asset in battle, which Sento incorporates into his fighting technique.
  • Genius Engineer: Sento has built the majority of Build's accessories, as well as all of Cross-Z's equipment, on his own.
  • Strategist: Sento has shown him to be a capable strategist, being able to outwit even Blood Stalk on two occasions.
• Fullbottle Augmentation: By using a Fullbottle in his hand without transforming, Sento can gain abilities based on said Fullbottle's traits:
  • Rabbit: Allows Sento to gain fast reflexes. First used to defeat Ryuga Banjou in a one-on-one fight.
  • Gorilla: Allows Sento to perform fiery punches. First used to fight Ryuga Banjou.

Weaknesses

• Narcissism: Sento has overwhelming confidence in his own skills, so he tends to be proud of his own achievements and look down on others (especially anyone who relies on his inventions), which contributes to his prideful personality. Sento often relies on his own skills to solve problems and never expects sudden assistance from others, so when it happens, he tends to either be surprised or turns them down. Also Sento can be easily caught off guard when he accomplishes anything or witnesses something unexpected and new which excites him, because of his reliance on his intellect. In this state, he is vulnerable to any surprise attacks.
• Desperate Curiosity: Sento can be easily attracted to anything that is mysterious and interesting and tends to do a total discovery for it, such as new innovations and anything that brings him closer to uncovering his past. This will continue until either he reaches a conclusion or someone forcibly stops him during progress.
• Dragon Fullbottle: As seen in episode 10, Sento's body cannot handle the Dragon Fullbottle's power as he transforms into Build KeyDragon, which causes him to be electrified by the energy surges and experiences intense pain. Further use of the Dragon Bottle causes his body to be engulfed in flame-like energy which hurts him even more and forcibly knocks Sento out of his transformation. This was due to Ryuga's Hazard Level 3 synchronizing more effectively with the Dragon Full Bottle from prolonged use and exposure to its energy, while Sento had never used it before, and hence lacked that immunity.
  • Dragon Jelly: Sento is incapable of using this item as it sends painful electric shocks through his body after being inserted into the Sclash Driver. Later, it was revealed that Sento's Hazard level was lacking as the minimum Hazard Level to use the Sclash Driver is a 4.0.
• Hazard Trigger: If Sento uses the Hazard Trigger for too long, it will overstimulate his nervous system and sending him into a mindless rampage, destroying anything and anyone in his path until his transformation is cancelled. Raising Sento's Hazard Level appears to prolong the time he can use the Trigger with his conscious intact.
• Hazard Kill Switch: With Utsumi's help, Sento designed a switch that would allow the user to overload the Hazard Trigger should Sento ever lose control while using it. Activating the switch would destroy the Hazard Trigger, killing Sento in the process.

Forms

Sento sets two different Fullbottles into the Build Driver and turns the crank to transform into Kamen Rider Build. Kamen Rider Build, like Kamen Riders Double and OOO before him, can assume a variety of different forms, called Trial Forms (トライアルフォーム, Toraiaru Fōmu), using different combinations of Fullbottles. However, each one has a Best Match (ベストマッチ, Besuto Matchi) with another Fullbottle that creates an especially powerful form. Best Matches usually have unique names in comparison to other mismatched forms, and the caps of Fullbottles indicate what Fullbottle is its Best Match. The additional use of the Hazard Trigger upgrades a Best Match into a Super Best Match (スーパベストマッチ, Supā Besuto Matchi).

Build initiates a finishing attack by turning the Build Driver's Vortex Crank again. The finisher of all Trial Forms is called the Vortex Attack (ボルテックアタック, Borutekku Atakku), while the finisher of the Best Matches is called the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu). The finisher of the Super Best Matches is called the Hazard Finish (ハザードフィニッシュ, Hazādo Finisshu).

• Standard
• Super
• Special
• Ganbarizing
• Legend Rider

• Rabbit
• Gorilla
• Taka
• Ninjya
• Panda
• Harinezumi
• Lion
• Dragon
• Kaizoku
• Octopus
• Phoenix
• Wolf
• Rose
• Tora
• Kujira
• Kirin

In any form that uses the Rabbit Fullbottle, Build is armed with the Rabbit Foot Shoes (ラビットフットシューズ, Rabitto Futto Shūzu) on his left leg for increased jumping, and can summon the Drill Crusher.

• Tank
• Soujiki
• Gatling
• Others

RabbitTank Form

RabbitTank Form

"Rabbit! Tank! Best Match! Are you Ready? (Techno Rock music) Hagane no Moonsault! RabbitTank! Yeahhh!"

―RabbitTank's transformation announcement^[src]

Rider Statistics

• Rider Height: 196.0 cm
• Rider Weight: 99.0 kg

Ability Perimeters:

• Punching Power: 9.9 tons (right arm)/17.0 tons (left arm)
• Kicking Power: 23.7 tons (right leg)/17.8 tons (left leg)
• Maximum Jump Height: 55.0 m
• Maximum Running Speed: 100 m. per 2.9 sec.

RabbitTank Form (ラビットタンクフォーム, Rabitto Tanku Fōmu) is Build's red and blue primary and default Best Match form form accessed from the Rabbit and Tank Fullbottles, hence known as the Moonsault of Steel (鋼のムーンサルト, Hagane no Mūnsaruto). It is themed after a rabbit and a tank.

RabbitTank is considered to be the most well balanced; having a good amount of power and agility in all of his Ability Perimeters, thus making it Build's default form, despite it being capable of initiating transformation with any set of Build's Fullbottles. This is also Build's second fastest form.

In this Best Match form, Build is armed with the Tank Roller Shoes (タンクローラーシューズ, Tanku Rōrā Shūzu) on his right leg for kicking attacks, and can also act as a working tread to roll along on a flat foot.

This form's weapon is the Drill Crusher.

As a Best Match, this form has two finishers:

• Build Driver finisher:
  • Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): Build dives underground to send a white energy chart flying up to the surface with the dotted line securing the enemy before leaping back up, and delivering a kick whilst riding the chart's line. According to Blood Stalk, this finisher has a Hazard Level of 3.2, and then 3.7 when Build attacks him out of anger.
• Drill Crusher finisher:
  • Vortex Break (ボルテックブレイク, Borutekku Bureiku):
    • Blade: Build channels the energy of a Fullbottle in his Drill Crusher and performs a powerful slash.
      • Organic:
        • Rabbit: The Drill Spiral Blade spins such that it creates an energy whirlpool before Build performs a red energy slash.
        • Gorilla: The Drill Spiral Blade cloaks itself in an energy projection that bears a striking resemblance to the Muscle Glove.
        • Ninjya: Purple energy Drill Spiral Blades are projected and spin violently around the Drill Crusher.
      • Inorganic:
        • Rocket: The Drill Crusher charges at the enemy and attacks like a rocket.
    • Gun: Build channels the energy of a Fullbottle in his Drill Crusher and performs a powerful blast.
      • Harinezumi: Build shoots white energy spikes at the enemy.

Appearances: Build Episodes 1-2, Transformation Lessons: Kamen Rider Build Chapter, Build 3, 5-7, 10, 13 (flashback), 14, Heisei Generations FINAL: Build & Ex-Aid with Legend Riders, Build 15-17, Birth! KumaTelevi!! VS Kamen Rider Grease!, Build 21-24

RabbitSoujiki Form

RabbitSoujiki Form

"Rabbit! Soujiki! Are you Ready?"

―RabbitSoujiki's transformation announcement^[src]

Rider Statistics

• Rider Height: 196.0 cm
• Rider Weight: 93.7 kg

Ability Perimeters:

• Punching Power: 7.9t (right arm)/5.7t (left arm)
• Kicking Power: 9.6t (right leg)/14.2t (left leg)
• Maximum Jump Height: 38.4m
• Maximum Running Speed: 100m. per 3.9 sec

RabbitSoujiki Form (ラビット掃除機フォーム, Rabitto Sōjiki Fōmu) is Build's red and turquoise Trial Form accessed through the Rabbit and Soujiki Fullbottles, themed after a rabbit and a vacuum cleaner.

In this Trial Form, Build is armed with the Long Range Cleaner (ロングレンジクリーナー, Rongu Renji Kurīnā) on his left arm that can suck things in with high-velocity winds, and the Trash Converter (トラッシュコンバーター, Torasshu Konbātā) on his left shoulder that stores what has been sucked in.

This Trial Form gives Build the ability to absorb any elemental attacks using the Long Range Cleaner, and safely disarm the accumulated attack using the Trash Converter. However, this comes at the cost of all of his Ability Perimeters being decreased from RabbitTank.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Appearances: Build Episode 2

RabbitGatling Form

RabbitGatling Form

"Rabbit! Gatling! Are you Ready?"

―RabbitGatling's transformation announcement^[src]

Rider Statistics

• Rider Height: 196.0 cm
• Rider Weight: 95.0 kg

Ability Perimeters:

• Punching Power: 7.9 t (right arm)/8.0 t (left arm)
• Kicking Power: 10.8 t (right leg)/14.2 t (left leg)
• Maximum Jump Height: 37.7m
• Maximum Running Speed: 100m. per 6.2 sec

RabbitGatling Form (ラビットガトリングフォーム, Rabitto Gatoringu Fōmu) is Build's red and gray Trial Form accessed through the Rabbit and Gatling Fullbottles, themed after a rabbit and a gatling gun.

In this Trial Form, Build is armed with the Hawk Gatlinger and Drill Crusher.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Appearances: Build Episode 4

Trial Forms

"Rabbit! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

RabbitDiamond Form

RabbitComic Form

RabbitRocket Form

RabbitShoubousha Form

RabbitLock Form

RabbitDensya Form

RabbitLight Form

RabbitRobot Form

RabbitSmapho Form

RabbitTelevi Form

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RabbitHelicopter Form

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RabbitGold Form

RabbitKeshigomu Form

RabbitWatch Form

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RabbitReizoko Form

RabbitCamera Form

RabbitMic Form

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RabbitUFO Form

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RabbitSenpuki Form

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RabbitJet Form

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RabbitBike Form

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RabbitPyramid Form

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RabbitSukebo Form

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RabbitDryer Form

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RabbitSensuikan Form

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RabbitF1 Form

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RabbitMagnet Form

RabbitCake Form

RabbitUSB Memory Form

RabbitMedal Form

RabbitParka Form

RabbitGame Form

In any form that uses the Gorilla Fullbottle, Build is armed with the Muscle Glove (マッスルグローブ, Massuru Gurōbu) on his right arm for enhanced punching.

• Diamond
• Soujiki
• Rocket
• Others

GorillaMond Form

GorillaMond Form

"Gorilla! Diamond! Best Match! Are you Ready? (Tropical Rock music) Kagayaki no Destroyer! GorillaMond! Yeahhh!"

―GorillaMond's transformation announcement^[src]

Rider Statistics

• Rider Height: 189.0 cm
• Rider Weight: 112.0 kg

Ability Perimeters:

• Punching Power: 25.9 tons (right arm)/15.8 tons (left arm)
• Kicking Power: 17.3 tons (right leg)/16.5 tons (left leg)
• Maximum Jump Height: 32.5 m
• Maximum Running Speed: 100 m. per 8.4 sec.

GorillaMond Form (ゴリラモンドフォーム, Goriramondo Fōmu) is Build's brown and cyan second Best Match form accessed from the Gorilla and Diamond Fullbottles, hence known as the Shining Destroyer (輝きのデストロヤー, Kagayaki no Desutoroyā). It is themed after a gorilla and a diamond.

In this Best Match form, Build is armed with the BLD Prism Glove (BLDプリズムグローブ, BLD Purizumu Gurōbu) on his left hand.

GorillaMond shows an increase in power, as the Punching Power of Build is significantly higher than in RabbitTank, albeit with a slightly decreased amount in its left arm, but it lacks Kicking Power and agility compared to RabbitTank. His left arm can convert inorganic objects, or even weakened enemies, into diamonds.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): This finisher has two variations:

• Build uses the BLD Prism Glove creates a gust full of diamonds and uses the Muscle Glove to punch them at the enemy. The diamond then creates a tornado that causes a human to separate from his/her Smash form, then Build punches the Smash inside the tornadoes, thereby defeating the Smash.
• Build stops an enemy's projectile attack in mid-air with the BLD Prism Glove, altering the projectiles' atomic structure into a diamond shield. He then punches the shield with the Muscle Glove, shattering it and sending the shards flying at the enemy at high speeds.

Appearances: Build Episode 2, Transformation Lessons: Kamen Rider Build Chapter, Build 3-4, 6, Heisei Generations FINAL: Build & Ex-Aid with Legend Riders

GorillaSoujiki Form

GorillaSoujiki Form

"Gorilla! Soujiki! Are you Ready?"

―GorillaSoujiki's transformation announcement^[src]

Rider Statistics

• Rider Height: 189.0 cm
• Rider Weight: 111.7 kg

Ability Perimeters:

• Punching Power: 20.7 tons (right arm)/5.7 tons (left arm)
• Kicking Power: 9.6 tons (right leg)/13.2 tons (left leg)
• Maximum Jump Height: 26.5 m
• Maximum Running Speed: 100 m. per 6.2 sec.

GorillaSoujiki Form (ゴリラ掃除機フォーム, Gorira Sōjiki Fōmu) is Build's brown and turquoise Trial Form accessed through the Gorilla and Soujiki Fullbottles, themed after a gorilla and a vacuum cleaner.

In this Trial Form, Build is armed with the Long Range Cleaner (ロングレンジクリーナー, Rongu Renji Kurīnā) on his left arm that can suck things in with high-velocity winds, and the Trash Converter (トラッシュコンバーター, Torasshu Konbātā) on his left shoulder that stores what has been sucked in.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Appearances: Build Episode 3

GorillaRocket Form

GorillaRocket Form

"Gorilla! Rocket! Are you Ready?"

―GorillaRocket's transformation announcement^[src]

Rider Statistics

• Rider Height: 189.0 cm
• Rider Weight: 115.0 kg

Ability Perimeters:

• Punching Power: 20.7 tons (right arm)/11.6 tons (left arm)
• Kicking Power: 13.5 tons (right leg)/13.2 tons (left leg)
• Maximum Jump Height: 32.5 m
• Maximum Running Speed: 100 m. per 9.1 sec.

GorillaRocket Form (ゴリラロケットフォーム, Gorira Roketto Fōmu) is Build's brown and light blue Trial Form accessed through the Gorilla and Rocket Fullbottles, themed after a gorilla and a rocket.

In this Trial Form, Build is armed with the Space Ride Arm (スペースライドアーム, Supēsu Raido Āmu) on his left arm that can fly off as a rocket and ram the opponent, and let him fly.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Appearances: Build Episode 8

Trial Forms

"Gorilla! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

GorillaTank Form

GorillaGatling Form

GorillaComic Form

GorillaShoubousha Form

GorillaLock Form

GorillaDensya Form

GorillaLight Form

GorillaRobot Form

GorillaSmapho Form

GorillaTelevi Form

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GorillaHelicopter Form

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GorillaGold Form

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GorillaKeshigomu Form

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GorillaWatch Form

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GorillaReizoko Form

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GorillaCamera Form

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GorillaMic Form

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GorillaUFO Form

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GorillaSenpuki Form

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GorillaJet Form

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GorillaBike Form

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GorillaPyramid Form

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GorillaSukebo Form

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GorillaDryer Form

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GorillaSensuikan Form

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GorillaF1 Form

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GorillaMagnet Form

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GorillaCake Form

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GorillaUSB Memory Form

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GorillaMedal Form

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GorillaParka Form

GorillaGame Form

In any form that uses the Taka Fullbottle, Build is armed with the Solstall Wings (ソレスタルウィング, Soresutaru Wingu) on his back that grant him the ability to fly. He may also be able to summon the Hawk Gatlinger like other Trial Forms and their Best Match weapons, but this is yet unconfirmed.

• Gatling
• Others

HawkGatling Form

HawkGatling Form

Extended wings

"Taka! Gatling! Best Match! Are you Ready? (Techno Rock music) Tenkuu no Abarenbou! HawkGatling! Yeahhh!"

―HawkGatling's transformation announcement^[src]

Rider Statistics

• Rider Height: 193.0 cm
• Rider Weight: 107.0 kg

Ability Perimeters:

• Punching Power: 9.7 tons (right arm)/10.0 tons (left arm)
• Kicking Power: 13.5 tons (right leg)/14.2 tons (left leg)
• Maximum Jump Height: 41.7 m
• Maximum Running Speed: 100 m. per 5.8 sec.

HawkGatling Form (ホークガトリングフォーム, Hōku Gatoringu Fōmu) is Build's orange and gray Best Match form accessed with the Taka and Gatling Fullbottles, hence known as the Rampage of the Skies (天空の暴れん坊, Tenkū no Abarenbō). It is themed after a hawk and a gatling gun.

While this Best Match has low stats compared to RabbitTank, this is made up for by the Solstall Wings on his back which grant him flight capabilities, as well as the utilization of the Gatling Fullbottle's Hawk Gatlinger that was designed for this particular Best Match.

As a Best Match, this form has two finishers:

• Build Driver finisher:
  • Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu).
• Hawk Gatlinger finisher:
  • Full Bullet (フルブレット, Furu Buretto): Build spins the Revol-Magazine ten times causing the gun to surround itself and its wielder with a white energy spherical graph that traps all enemies in mid-air before firing upon them all.

Appearances: Build Episodes 3-5, 8-10, 13, Heisei Generations FINAL: Build & Ex-Aid with Legend Riders, Build 16, 20, 24

Trial Forms

"Taka! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

TakaTank Form

TakaDiamond Form

TakaComic Form

TakaRocket Form

TakaShoubousha Form

TakaSoujiki Form

TakaLock Form

TakaDensya Form

TakaLight Form

TakaRobot Form

TakaSmapho Form

TakaTelevi Form

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TakaHelicopter Form

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TakaGold Form

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TakaKeshigomu Form

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TakaWatch Form

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TakaReizoko Form

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TakaCamera Form

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TakaMic Form

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TakaUFO Form

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TakaSenpuki Form

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TakaJet Form

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TakaBike Form

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TakaPyramid Form

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TakaSukebo Form

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TakaDryer Form

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TakaSensuikan Form

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TakaF1 Form

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TakaMagnet Form

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TakaCake Form

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TakaUSB Memory Form

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TakaMedal Form

TakaParka Form

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TakaGame Form

In any form that uses the Ninjya Fullbottle, Build wields the 4Koma Ninpoutou. It also grants Build the Onmitsu Scarf (オンミツスカーフ, Onmitsu Sukāfu) on the right side of his back.

• Comic
• Tank
• Others

NinninComic Form

NinninComic Form

"Ninjya! Comic! Best Match! Are you Ready? (Techno Shinobi music) Shinobi no Entertainer! NinninComic! Yeahhh!"

―NinninComic's transformation announcement^[src]

Rider Statistics

• Rider Height: 194.0 cm
• Rider Weight: 90.5 kg

Ability Perimeters:

• Punching Power: 11.1 t (right arm)/8.8 t (left arm)
• Kicking Power: 10.1 t (right leg)/22.2 t (left leg)
• Maximum Jump Height: 45.4 m
• Maximum Running Speed: 100m. per 4.2 sec

NinninComic Form (ニンニンコミックフォーム, Ninnin Komikku Fōmu) is Build's purple and yellow Best Match form accessed with the Ninjya and Comic Fullbottles, hence known as the Stealthy Entertainer (忍びのエンターテイナー, Shinobi no Entāteinā). It is themed after a ninja and a comic book.

This form grants Build well-balanced abilities akin of RabbitTank. Furthermore, it has increased kicking and punching power with the cost of jumping power and speed. The 4Koma Ninpoutou was designed for this particular Best Match. This is also Build's fourth fastest form.

As a Best Match, this form has several finishers:

• Build Driver finisher:
  • Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu)
• 4Koma Ninpoutou finishers:
  • Clone Jutsu (分身の術, Bunshin no Jutsu, Art of Cloning): Build presses the Vortex Trigger one time and creates a number of clones of himself that attack together.
  • Fire Jutsu (火遁の術, Katon no Jutsu, Art of Fire Releasing): Build presses the Vortex Trigger two times and delivers a flaming slash attack. While performing this attack, the 4Koma Ninpoutou announces Blazing Slash (火炎斬り, Kaen Giri).
  • Wind Jutsu (風遁の術, Fūton no Jutsu, Art of Wind Releasing): Build presses the Vortex Trigger three times and creates a tornado around the blade. While performing this attack, the 4Koma Ninpoutou announces Tornado Slash (竜巻斬り, Tatsumaki Giri).
  • Stealth Jutsu (隠れ身の術, Kakuremi no Jutsu, Art of Camouflage): Build presses the Vortex Trigger four times and teleports a short distance away in a puff of smoke. While performing this attack, the 4Koma Ninpoutou announces Doron (ドロン, Doron, lit. "Abscond"), with a heavy drumbeat when he disappears and reappears.

Appearances: Build Episodes 5-7, 9, 12-13, Heisei Generations FINAL: Build & Ex-Aid with Legend Riders, Build 16, Birth! KumaTelevi!! VS Kamen Rider Grease!, Build 20

NinjyaTank Form

NinjyaTank Form

"Ninjya! Tank! Are you Ready?"

―NinjyaTank's transformation announcement^[src]

Rider Statistics

• Rider Height: 194.0 cm
• Rider Weight: 101.1 kg

Ability Perimeters:

• Punching Power: 8.9 t (right arm)/13.6 t (left arm)
• Kicking Power: 19.0 t (right leg)/17.8 t (left leg)
• Maximum Jump Height: 32.3 m
• Maximum Running Speed: 100m. per 2.3 sec

NinjyaTank Form (忍者タンクフォーム, Ninja Tanku Fōmu) is Build's purple and blue Trial Form accessed through the Ninjya and Tank Fullbottles, themed after a ninja and a tank.

In this Trial Form, Build is armed with the Tank Roller Shoes (タンクローラーシューズ, Tanku Rōrā Shūzu) on his right leg for kicking attacks, and can also act as a working tread to roll along on a flat foot, as well as the Drill Crusher.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Appearances: Build Episode 6

Trial Forms

"Ninjya! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

NinjyaDiamond Form

NinjyaGatling Form

NinjyaRocket Form

NinjyaShoubousha Form

NinjyaSoujiki Form

NinjyaLock Form

NinjyaDensya Form

NinjyaLight Form

NinjyaRobot Form

NinjyaSmapho Form

NinjyaTelevi Form

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NinjyaHelicopter Form

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NinjyaGold Form

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NinjyaKeshigomu Form

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NinjyaWatch Form

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NinjyaReizoko Form

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NinjyaCamera Form

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NinjyaMic Form

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NinjyaUFO Form

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NinjyaSenpuki Form

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NinjyaJet Form

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NinjyaBike Form

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NinjyaPyramid Form

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NinjyaSukebo Form

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NinjyaDryer Form

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NinjyaSensuikan Form

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NinjyaF1 Form

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NinjyaMagnet Form

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NinjyaCake Form

NinjyaUSB Memory Form

NinjyaMedal Form

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NinjyaParka Form

NinjyaGame Form

In any form that uses the Panda Fullbottle, Build is armed with the Giant Scratcher (ジャイアントスクラッチャー, Jaianto Sukuracchā) claws on his right hand.

• Rocket
• Gatling
• Others

RocketPanda Form

RocketPanda Form

"Panda! Rocket! Best Match! Are you Ready? (Monotone Classical music) Buttobi Monotone! RocketPanda! Yeahhh!"

―RocketPanda's transformation announcement^[src]

Rider Statistics

• Rider Height: 189.0 cm
• Rider Weight: 114.0 kg

Ability Perimeters:

• Punching Power: 18.8 t (right arm)/14.5 t (left arm)
• Kicking Power: 16.9 t (right leg)/15.4 t (left leg)
• Maximum Jump Height: 43.6 m
• Maximum Running Speed: 100m. per 8.5 sec

RocketPanda Form (ロケットパンダフォーム, Roketto Panda Fōmu) is Build's snow white and light blue Best Match form accessed with the Rocket and Panda Fullbottles, hence known as the Flying Monotone (ぶっ飛びモノトーン, Buttobi Monotōn). It is themed after a panda and a rocket.

In this Best Match form, Build is armed with the Space Ride Arm (スペースライドアーム, Supēsu Raido Āmu) on his left arm that can fly off as a rocket and ram the opponent, and let him fly.

This form grants Build a balanced boost in punching, kicking and jumping power, albeit his speed is the slowest of all forms so far.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): Build surrounds the enemy with a white, oval-shaped energy chart, then uses the Space Ride Arm to fly at the enemy and performs a series of slashes with the Giant Scratcher. The chart goes up as Build continues to slash the enemy.

Appearances: Build Episode 7-8, 15, 18, 20

PandaGatling Form

PandaGatling Form

"Panda! Gatling! Are you Ready?"

―PandaGatling's transformation announcement^[src]

Rider Statistics

• Rider Height: 189.0 cm
• Rider Weight: 112.0 kg

Ability Perimeters:

• Punching Power: 15.0 t (right arm)/8.0 t (left arm)
• Kicking Power: 10.8 t (right leg)/12.3 t (left leg)
• Maximum Jump Height: 26.6 m
• Maximum Running Speed: 100m. per 8.6 sec

PandaGatling Form (パンダガトリングフォーム, Panda Gatoringu Fōmu) is Build's snow white and gray Trial Form accessed through the Panda and Gatling Fullbottles, themed after a panda bear and a gatling gun.

In this Trial Form, Build is armed with the Hawk Gatlinger.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Appearances: Build Episode 7

Trial Forms

"Panda! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

PandaTank Form

PandaDiamond Form

PandaComic Form

PandaShoubousha Form

PandaSoujiki Form

PandaLock Form

PandaDensya Form

PandaLight Form

PandaRobot Form

PandaSmapho Form

PandaTelevi Form

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PandaHelicopter Form

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PandaGold Form

PandaKeshigomu Form

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PandaWatch Form

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PandaReizoko Form

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PandaCamera Form

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PandaMic Form

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PandaUFO Form

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PandaSenpuki Form

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PandaJet Form

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PandaBike Form

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PandaPyramid Form

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PandaSukebo Form

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PandaDryer Form

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PandaSensuikan Form

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PandaF1 Form

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PandaMagnet Form

PandaCake Form

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PandaUSB Memory Form

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PandaMedal Form

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PandaParka Form

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PandaGame Form

In any form that uses the Harinezumi Fullbottle, Build is armed with the Spine Knuckle (スパインナックル, Supain Nakkuru) on his right fist, allowing him to clobber foes with spikes that extend outwards when used. When first used after transforming, the spines notably appear to fly in from the surroundings to the Spine Knuckle, only extending from it on subsequent attacks.

• Shoubousha
• Tank
• Others

FireHedgehog Form

FireHedgehog Form

"Harinezumi! Shoubousha! Best Match! Are you Ready? (Techno Pop music) Rescue Kenzan! FireHedgehog! Yeahhh!"

―FireHedgehog's transformation announcement^[src]

Rider Statistics

• Rider Height: 190.0 cm
• Rider Weight: 103.7 kg

Ability Perimeters:

• Punching Power: 13.7 tons (right arm)/11.9 tons (left arm)
• Kicking Power: 14.7 tons (right leg)/14.0 tons (left leg)
• Maximum Jump Height: 36.5 m
• Maximum Running Speed: 100 m. per 6.4 sec.

FireHedgehog Form (ファイヤヘッジホッグフォーム, Faiya Hejjihoggu Fōmu) is Build's white and scarlet-colored Best Match form accessed from the Harinezumi and Shoubousha Fullbottles, hence known as the Rescue Kenzan (レスキュー剣山, Resukyū Kenzan). It is themed after a hedgehog and a fire engine.

In this Best Match form, Build is armed with the Multi Deluge Gun (マルチデリュージガン, Maruchi Deryūji Gan) on his left arm that can shoot water, fire, or extend.

This form give build balanced boost in punching, kicking and jumping power, albeit at the cost of his running speed.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): Build extends the Multi Deluge Gun and uses it to stab the enemy, then fills them up with water and surrounds them with a white energy chart before jumping up such that he's perpendicular with the ground, then dropping down, and punching the enemy with the Spine Knuckle.

Appearances: Build Episode 8, 10, 15, 19

HarinezumiTank Form

HarinezumiTank Form

"Harinezumi! Tank! Are you Ready?"

―HarinezumiTank's transformation announcement^[src]

Rider Statistics

• Rider Height: 194.0 cm
• Rider Weight: 102.7 kg

Ability Perimeters:

• Punching Power: 11.0 tons (right arm)/13.6 tons (left arm)
• Kicking Power: 19.0 tons (right leg)/11.2 tons (left leg)
• Maximum Jump Height: 28.4 m
• Maximum Running Speed: 100 m. per 7.0 sec.

HarinezumiTank Form (ハリネズミタンクフォーム, Harinezumi Tanku Fōmu) is Build's white and blue Trial Form accessed through the Harinezumi and Tank Fullbottles, themed after a hedgehog and a tank.

Compared to RabbitTank, this Trial Form has a stronger amount of Punching Power in its right arm, while being weaker in the left. The rest of the Ability Perimeters are overall much worse in comparison.

In this Trial Form, Build is armed with the Tank Roller Shoes (タンクローラーシューズ, Tanku Rōrā Shūzu) on his right leg for kicking attacks, and can also act as a working tread to roll along on a flat foot.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Appearances: Build Episodes 1-2

Trial Forms

"Harinezumi! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

HarinezumiDiamond Form

HarinezumiGatling Form

HarinezumiComic Form

HarinezumiRocket Form

HarinezumiSoujiki Form

HarinezumiLock Form

HarinezumiDensya Form

HarinezumiLight Form

HarinezumiRobot Form

HarinezumiSmapho Form

HarinezumiTelevi Form

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HarinezumiHelicopter Form

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HarinezumiGold Form

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HarinezumiKeshigomu Form

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HarinezumiWatch Form

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HarinezumiReizoko Form

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HarinezumiCamera Form

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HarinezumiMic Form

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HarinezumiUFO Form

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HarinezumiSenpuki Form

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HarinezumiJet Form

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HarinezumiBike Form

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HarinezumiPyramid Form

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HarinezumiSukebo Form

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HarinezumiDryer Form

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HarinezumiSensuikan Form

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HarinezumiF1 Form

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HarinezumiMagnet Form

HarinezumiCake Form

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HarinezumiUSB Memory Form

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HarinezumiMedal Form

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HarinezumiParka Form

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HarinezumiGame Form

In any form that uses the Lion Fullbottle, Build is armed with the Gold Lio Gauntlet (ゴルドライオガントレット, Gorudo Raio Gantoretto) on his right arm that lets him shoot bursts of yellow energy by punching.

• Soujiki
• Comic
• Others

LionCleaner Form

LionCleaner Form

"Lion! Soujiki! Best Match! Are you Ready? (Upbeat Techno Pop music) Tategami Cyclone! LionCleaner! Yeah!"

―LionCleaner's transformation announcement^[src]

Rider Statistics

• Rider Height: 189.0 cm
• Rider Weight: 104.3 kg

Ability Perimeters:

• Punching Power: 17.4 tons (right arm)/7.1 tons (left arm)
• Kicking Power: 12.0 tons (right leg)/21.3 tons (left leg)
• Maximum Jump Height: 39.0 m
• Maximum Running Speed: 100 m. per 3.6 sec.

LionCleaner Form (ライオンクリーナーフォーム, Raion Kurīnā Fōmu) is Build's marigold and turquoise Best Match form accessed with the Lion and Soujiki Fullbottles, hence known as the Mane Cyclone (鬣サイクロン, Tategami Saikuron). It is themed after a lion and a vacuum cleaner.

In this Best Match form, Build is armed with the Long Range Cleaner (ロングレンジクリーナー, Rongu Renji Kurīnā) on his left arm that can suck things in with high-velocity winds, and the Trash Converter (トラッシュコンバーター, Torasshu Konbātā) on his left shoulder that stores what has been sucked in.

This form grants Build a balanced boost in all his ability perimeters. This is also Build's third fastest form.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): Build uses the Long Range Cleaner to suck the enemy towards him, holding it in place, before coating the Gold Lio Gauntlet in yellow energy, then firing off an energy lion head that bites the opponent on contact.

Though Build possessed both Fullbottles needed for this form for an extended time and seemingly knew of their Best Match, he didn't use them until much later, likely because Lion was always being used for the Machine Builder.

Appearances: Build Episodes 9-10, 15

LionComic Form

LionComic Form

"Lion! Comic! Are you Ready?"

―LionComic's transformation announcement^[src]

Rider Statistics

• Rider Height: 194.0 cm
• Rider Weight: 99.0 kg

Ability Perimeters:

• Punching Power: 13.9 tons (right arm)/7.0 tons (left arm)
• Kicking Power: 8.1 tons (right leg)/17.0 tons (left leg)
• Maximum Jump Height: 32.8 m
• Maximum Running Speed: 100 m. per 5.6 sec.

LionComic Form (ライオンコミックフォーム, Raion Komikku Fōmu) is Build's marigold and yellow Trial Form accessed with the Lion and Comic Fullbottles, themed after a lion and a comic book.

In this Trial Form, Build is armed with the 4Koma Ninpoutou.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku)

Appearances: Build Episode 15

Trial Forms

"Lion! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

LionTank Form

LionDiamond Form

LionGatling Form

LionRocket Form

LionShoubousha Form

LionLock Form

LionDensya Form

LionLight Form

LionRobot Form

LionSmapho Form

LionTelevi Form

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LionHelicopter Form

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LionGold Form

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LionKeshigomu Form

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LionWatch Form

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LionReizoko Form

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LionCamera Form

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LionMic Form

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LionUFO Form

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LionSenpuki Form

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LionJet Form

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LionBike Form

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LionPyramid Form

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LionSukebo Form

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LionDryer Form

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LionSensuikan Form

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LionF1 Form

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LionMagnet Form

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LionCake Form

LionUSB Memory Form

LionMedal Form

LionParka Form

LionGame Form

In any form that uses the Dragon Fullbottle, Build can make powerful punches and scratches with his right hand augmented by blue flames. Any form using this Fullbottle tends to be unstable, due to its immense power and close tuning to Ryuga instead of Sento.

Its power is so strong that even its Best Match configuration cannot stabilize it for long, and Build can be forced out of his transformation and get injured.

• Lock
• Others

KeyDragon Form

KeyDragon Form

"Dragon! Lock! Best Match! Are you Ready? (Classical music) Fūin no Fantasy Star! KeyDragon! Yeahhh!"

―KeyDragon's transformation announcement^[src]

Rider Statistics

• Rider Height: 196.0 cm
• Rider Weight: 108.0 kg

Ability Perimeters:

• Punching Power: 19.7 tons (right arm)/16.9 tons (left arm)
• Kicking Power: 17.6 tons (right leg)/24.1 tons (left leg)
• Maximum Jump Height: 47.4 m
• Maximum Running Speed: 100 m. per 5.1 sec.

KeyDragon Form (キードラゴンフォーム, Kī Doragon Fōmu) is Build's navy and gold Best Match form accessed with the Dragon and Lock Fullbottles, hence known as the Sealed Fantasy Star (封印のファンタジースター, Fūin no Fantajī Sutā). It is themed after a dragon and a lock.

This form grants Build a significant parameter boost along with jumping power, albeit at a cost in running speed. Despite its tremendous power, this form also possesses a drawback of a potential overload due to the Dragon Fullbottle's strong synchronization with Ryuga.

In this Best Match Form, Build is armed with the Bind Master Key ( バインドマスターキー, Baindo Masutā Kī) on his left arm which can be used as a battering weapon due to its weight.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): Build fires several chains from the Bind Master Key to bind the opponent in place before creating and throwing a powerful dark blue fireball, that detonates upon impact.

Appearances: Build Episode 10-11

Trial Forms

"Dragon! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

DragonTank Form

DragonDiamond Form

DragonGatling Form

DragonComic Form

DragonRocket Form

DragonShoubousha Form

DragonSoujiki Form

DragonDensya Form

DragonLight Form

DragonRobot Form

DragonSmapho Form

DragonTelevi Form

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DragonHelicopter Form

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DragonGold Form

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DragonKeshigomu Form

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DragonWatch Form

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DragonReizoko Form

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DragonCamera Form

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DragonMic Form

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DragonUFO Form

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DragonSenpuki Form

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DragonJet Form

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DragonBike Form

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DragonPyramid Form

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DragonSukebo Form

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DragonDryer Form

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DragonSensuikan Form

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DragonF1 Form

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DragonMagnet Form

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DragonCake Form

DragonUSB Memory Form

DragonMedal Form

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DragonParka Form

DragonGame Form

In any form that uses the Kaizoku Fullbottle, Build wields the Kaizoku Hassyar.

• Densya
• Gatling
• Others

KaizokuRessya Form

KaizokuRessya Form

"Kaizoku! Densya! Best Match! Are you Ready? (Classical Rock music) Teikoku no Hangyakusha! KaizokuRessya! Yeahhh!"

―KaizokuRessya's transformation announcement^[src]

Rider Statistics

• Rider Height: 189.0 cm
• Rider Weight: 95.8 kg

Ability Perimeters:

• Punching Power: 12.0 tons (right arm)/12.7 tons (left arm)
• Kicking Power: 15.0 tons (right leg)/13.8 tons (left leg)
• Maximum Jump Height: 39.4 m
• Maximum Running Speed: 100 m. per 2.5 sec.

KaizokuRessya Form (海賊レッシャフォーム, Kaizoku Ressha Fōmu, lit. PirateTrain Form) is Build's azure and lime green Best Match form accessed with the Kaizoku and Densya Fullbottles, hence known as the Punctual Rebel (定刻の反逆者, Teikoku no Hangyakusha). It is themed after a pirate and a train.

Being based on a train, this form is Build's fastest Best Match form, only being outpaced by Trial Form NinjyaTank by 0.2 seconds. The Kaizoku Hassyar was designed for this Best Match.

In this form, Build is armed with the Train Gauntlet (トレインガントレット, Torein Gantoretto) on his left arm for increased speed.

Using the Kaizoku Hassyar, Build can perform three different special attacks by pulling back the Build Arrow and holding it before letting go. Charging the Kaizoku Hassyar escalates its shot through three of the four tiers. While performing any of this attacks, the Kaizoku Hassyar announces Shuppatsu (出発, Shuppatsu lit. Departure).

• Kakueki Densha (各駅電車, Kakueki Densha lit. All Station Train)
• Kyuukou Densha (急行電車, Kyūkō Densha, lit. Express Train)
• Kaisoku Densha (快速電車, Kaisoku Densha lit. Rapid-Service Train)

As a Best Match, this form has three finishers:

• Build Driver finisher:
  • Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu):
• Drill Crusher finisher:
  • Vortex Break (ボルテックブレイク, Borutekku Bureiku):
    • Blade: Build channels the energy of a Fullbottle in his Drill Crusher and performs a powerful slash.
      • Kaizoku: The Drill Spiral Blade spins such that it creates an energy whirlpool before Build performs a double green energy slash.
• Kaizoku Hassyar finisher:
  • Kaizoku Densha (海賊電車, Kaizoku Densha lit. Pirate Train): It is charged by pulling back the Build Arrow and holding it before letting go. While performing this finisher, the Kaizoku Hassyar announces Hassha (発射, Hassha lit. Fire).
    • Build fires a green and azure energy train from the Kaizoku Hassyar that not only rams into the enemy, but shoots azure energy discs as well.

Appearances: Build Episodes 12-13, Heisei Generations FINAL: Build & Ex-Aid with Legend Riders, Build 15, 19

KaizokuGatling Form

KaizokuGatling Form

"Kaizoku! Gatling! Are you Ready?"

―KaizokuGatling's transformation announcement^[src]

Rider Statistics

• Rider Height: 189.0 cm
• Rider Weight: 98.1 kg

Ability Perimeters:

• Punching Power: 9.6 tons (right arm)/8.0 tons (left arm)
• Kicking Power: 10.8 tons (right leg)/11.0 tons (left leg)
• Maximum Jump Height: 33.1 m
• Maximum Running Speed: 100 m. per 6.7 sec.

KaizokuGatling Form (海賊ガトリングクフォーム, Kaizoku Gatoringu Fōmu) is Build's azure and gray Trial Form accessed through the Kaizoku and Gatling Fullbottles, themed after a pirate and a gatling gun.

In this Trial Form, Build is armed with the Hawk Gatlinger. Even though Build didn't use the Hawk Gatlinger in the debut episode, a scan shows that he does use it in this form.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Appearances: Build Episode 16

Trial Forms

"Kaizoku! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special. KaizokuShoubousha specifically was almost used in Build Episode 8, but Sento decided otherwise upon seeing it wasn't a Best Match.

KaizokuTank Form

KaizokuDiamond Form

KaizokuComic Form

KaizokuRocket Form

KaizokuShoubousha Form

KaizokuSoujiki Form

KaizokuLock Form

KaizokuLight Form

KaizokuRobot Form

KaizokuSmapho Form

KaizokuTelevi Form

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KaizokuHelicopter Form

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KaizokuGold Form

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KaizokuKeshigomu Form

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KaizokuWatch Form

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KaizokuReizoko Form

KaizokuCamera Form

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KaizokuMic Form

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KaizokuUFO Form

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KaizokuSenpuki Form

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KaizokuJet Form

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KaizokuBike Form

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KaizokuPyramid Form

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KaizokuSukebo Form

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KaizokuDryer Form

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KaizokuSensuikan Form

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KaizokuF1 Form

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KaizokuMagnet Form

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KaizokuCake Form

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KaizokuUSB Memory Form

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KaizokuMedal Form

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KaizokuParka Form

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KaizokuGame Form

In any form that uses the Octopus Fullbottle, Build is armed with the Twist Lash Arm (ツイストラッシュアーム, Tsuisuto Rasshu Āmu) on his right shoulder that can be used to bind his opponents.

• Light
• Others

OctopusLight Form

OctopusLight Form

"Octopus! Light! Best Match! Are you Ready? (Upbeat Techno Rock music) Inazuma Technician! OctopusLight! Yeahhh!"

―OctopusLight's transformation announcement^[src]

Rider Statistics

• Rider Height: 193.5 cm
• Rider Weight: 96.5 kg

Ability Perimeters:

• Punching Power: 4.4 tons (right arm)/4.8 tons (left arm)
• Kicking Power: 8.6 tons (right leg)/8.0 tons (left leg)
• Maximum Jump Height: 42.1 m
• Maximum Running Speed: 100 m. per 6.5 sec.

OctopusLight Form (オクトパスライトフォーム, Okutopasu Raito Fōmu) is Build's magenta and light yellow Best Match form accessed with the Octopus and Light Fullbottles, hence known as the Lightning Technician (稲妻テクニシャン, Inazuma Tekunishan). It is themed after an octopus and a light bulb.

This is Build's weakest Best Match form in terms of ability perimeters. However, his jumping power and speed is on average. As such, Build is restricted to OctopusLight's special abilities to win fights.

In this Best Match form, he is armed with the Shade Breaker (シェードブレイカーム, Shēdo Bureikā) and the BLD Light Bulb Shoulder (BLDライトバルブショルダー, Birudo Raito Barubu Shorudā), which can both be used together to create lightning in order to attack his opponents.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): Build fires an orb of jet-black ink from the head of the Twist Lash Arm that traps the enemy before snaring them with its tentacles, then using both the Shade Breaker and BLD Light Bulb Shoulder to shock the trapped enemy via a punching maneuver.

Appearances: Build Episode 13-14, 16

Trial Forms

"Octopus! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

OctopusTank Form

OctopusDiamond Form

OctopusGatling Form

OctopusComic Form

OctopusRocket Form

OctopusShoubousha Form

OctopusSoujiki Form

OctopusLock Form

OctopusDensya Form

OctopusRobot Form

OctopusSmapho Form

OctopusTelevi Form

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OctopusHelicopter Form

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OctopusGold Form

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OctopusKeshigomu Form

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OctopusWatch Form

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OctopusReizoko Form

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OctopusCamera Form

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OctopusMic Form

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OctopusUFO Form

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OctopusSenpuki Form

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OctopusJet Form

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OctopusBike Form

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OctopusPyramid Form

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OctopusSukebo Form

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OctopusDryer Form

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OctopusSensuikan Form

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OctopusF1 Form

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OctopusMagnet Form

OctopusCake Form

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OctopusUSB Memory Form

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OctopusMedal Form

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OctopusParka Form

OctopusGame Form

In any form that uses the Phoenix Fullbottle, Build is armed with the Flame Reviber (フレイムリヴァイバー, Fureimu Rivaibā) gauntlet on his right arm for pyrokinesis and Empirial Wings (エンパイリアルウィング, Enpairiaru Uingu) on his back that grant him the ability to fly.

• Robot
• Soujiki
• Others

PhoenixRobo Form

PhoenixRobo Form

"Phoenix! Robot! Best Match! Are you Ready? (Classical Rock music) Fujimi no Heiki! PhoenixRobo! Yeahhh!"

―PhoenixRobo's transformation announcement^[src]

Rider Statistics

• Rider Height: 191.0 cm
• Rider Weight: 112.3 kg

Ability Perimeters:

• Punching Power: 15.7 tons (right arm)/28.8 tons (left arm)
• Kicking Power: 23.4 tons (right leg)/16.8 tons (left leg)
• Maximum Jump Height: 43.6 m
• Maximum Running Speed: 100 m. per 6.4 sec.

PhoenixRobo Form (フェニックスロボフォーム, Fenikkusu Robo Fōmu) is Build's vermillion and gunmetal gray Best Match form accessed with the Phoenix and Robot Fullbottles, hence known as the Immortal Weapon (不死身の兵器, Fujimi no Heiki). It is themed after a phoenix and a robot.

In this Best Match form, Build is armed with the Demolition One (デモリションワン, Demorishon Wan) on his left hand for dismantling and crushing targets, which connected to the BLD Arsenal Shoulder (BLDアーセナルショルダー, Bī Eru Dī Āsenaru Shorudā) on his left shoulder that allows him to turn dismantled objects into his personal robot troops.

Stat-wise, this Best Match is significantly stronger than all previous Best Matches, and its punching power even surpasses RabbitTank Sparkling. In this form, Build handled the Hokuto Three Crows quite easy, which is something he couldn't do with RabbitTank Sparkling.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): Build covers himself in a bird-shaped flame before ramming the enemy into the air, then flies after the enemy before repeatedly ramming into it.

This form debuts in Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders after Soichi Isurugi gives Sento its Fullbottles, going on to appear in the series and specials.

Appearances: Heisei Generations FINAL: Build & Ex-Aid with Legend Riders, Build Episode 18, Raising the Hazard Level ~7 Best Matches~: First Chapter

PhoenixSoujiki Form

PhoenixSoujiki Form

"Phoenix! Soujiki! Are you Ready?"

―PhoenixSoujiki's transformation announcement^[src]

Rider Statistics

• Rider Height: 191.0 cm
• Rider Weight: 98.0 kg

Ability Perimeters:

• Punching Power: 12.6 tons (right arm)/5.7 tons (left arm)
• Kicking Power: 9.6 tons (right leg)/13.4 tons (left leg)
• Maximum Jump Height: 37.9 m
• Maximum Running Speed: 100 m. per 3.8 sec.

PhoenixSoujiki Form (フェニックス掃除機フォーム, Fenikkusu Sōjiki Fōmu) is Build's vermillion and turquoise Trial Form accessed through the Phoenix and Soujiki Fullbottles, themed after a phoenix and a vacuum cleaner.

In this Trial Form, Build is armed with the Long Range Cleaner (ロングレンジクリーナー, Rongu Renji Kurīnā) on his left arm that can suck things in with high-velocity winds, and the Trash Converter (トラッシュコンバーター, Torasshu Konbātā) on his left shoulder that stores what has been sucked in.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Appearances: Build Episodes 19, 21

Trial Forms

"Phoenix! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

PhoenixTank Form

PhoenixDiamond Form

PhoenixGatling Form

PhoenixComic Form

PhoenixRocket Form

PhoenixShoubousha Form

PhoenixLock Form

PhoenixDensya Form

PhoenixLight Form

PhoenixSmapho Form

PhoenixTelevi Form

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PhoenixHelicopter Form

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PhoenixGold Form

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PhoenixKeshigomu Form

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PhoenixWatch Form

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PhoenixReizoko Form

PhoenixCamera Form

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PhoenixMic Form

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PhoenixUFO Form

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PhoenixSenpuki Form

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PhoenixJet Form

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PhoenixBike Form

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PhoenixPyramid Form

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PhoenixSukebo Form

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PhoenixDryer Form

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PhoenixSensuikan Form

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PhoenixF1 Form

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PhoenixMagnet Form

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PhoenixCake Form

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PhoenixUSB Memory Form

PhoenixMedal Form

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PhoenixParka Form

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PhoenixGame Form

In any form that uses the Wolf Fullbottle, Build is armed with the Wolfatal Claw (ウルフェイタルクロー, Urufeitaru Kurō) on his right arm for channeling animal instinct.

• Smapho
• Others

SmaphoWolf Form

SmaphoWolf Form

"Wolf! Smapho! Best Match! Are you Ready? (Surfer music) Tsunagaru Ippiki Ookami! SmaphoWolf! Yeahhh!"

―SmaphoWolf's transformation announcement^[src]

Rider Statistics

• Rider Height: 189.0 cm
• Rider Weight: 91.6 kg

Ability Perimeters:

• Punching Power: 16.6 tons (right arm)/5.2 tons (left arm)
• Kicking Power: 10.4 tons (right leg)/20.8 tons (left leg)
• Maximum Jump Height: 41.6 m
• Maximum Running Speed: 100 m. per 5.1 sec.

SmaphoWolf Form (スマホウルフフォーム, Sumaho Urufu Fōmu) is Build's silver and blue Best Match form accessed with the Wolf and Smapho Fullbottles, hence known as the Connected Lone Wolf (繋がる一匹狼, Tsunagaru Ippiki Ōkami). It is themed after a wolf and the Build Phone.

In this Best Match form, Build is armed with the Build Pad Shield (ビルドパッドシールド, Birudo Paddo Shīrudo) on his left arm for either defending capabilities or selecting a recommended attack enhancement. Although the Build Pad Shield cracks upon sustaining a strong attack, it can repair itself. Befitting its identical appearance to the Build Phone, the Build Pad Shield can also function in the same manner, with the exception of Bike Mode.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): Build surrounds himself with a ring of energy smartphone icons before a black energy wolf shadow circles it, leaps out, and rams into any enemy within the ring.

Appearances: Build Episode 18, Raising the Hazard Level ~7 Best Matches~

Trial Forms

"Wolf! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

WolfTank Form

WolfDiamond Form

WolfGatling Form

WolfComic Form

WolfRocket Form

WolfShoubousha Form

WolfSoujiki Form

WolfLock Form

WolfDensya Form

WolfLight Form

WolfRobot Form

WolfTelevi Form

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WolfHelicopter Form

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WolfGold Form

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WolfKeshigomu Form

WolfWatch Form

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WolfReizoko Form

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WolfCamera Form

WolfMic Form

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WolfUFO Form

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WolfSenpuki Form

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WolfJet Form

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WolfBike Form

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WolfPyramid Form

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WolfSukebo Form

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WolfDryer Form

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WolfSensuikan Form

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WolfF1 Form

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WolfMagnet Form

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WolfCake Form

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WolfUSB Memory Form

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WolfMedal Form

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WolfParka Form

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WolfGame Form

In any form that uses the Rose Fullbottle, Build is armed with the Ibalash Arm (イバラッシュアーム, Ibarasshu Āmu) on his right arm for manipulating plant vines or firing thorn projections.

• Helicopter
• Soujiki
• Shoubousha
• Others

RoseCopter Form

RoseCopter Form

"Rose! Helicopter! Best Match! Are you Ready? (Spanish music) Jounetsu no Senpuki! RoseCopter! Yeahhh!"

―RoseCopter's transformation announcement^[src]

Rider Statistics

• Rider Height: 190.0 cm
• Rider Weight: 94.2 kg

Ability Perimeters:

• Punching Power: 6.3 tons (right arm)/12.9 tons (left arm)
• Kicking Power: 14.4 tons (right leg)/10.6 tons (left leg)
• Maximum Jump Height: 42.8 m
• Maximum Running Speed: 100 m. per 5.6 sec.

RoseCopter Form (ローズコプターフォーム, Rōzu Koputā Fōmu) is Build's red and turquoise Best Match form accessed with the Rose and Helicopter Fullbottles, hence known as the Fan of Passion (情熱の扇風機, Jōnetsu no Senpūki). It is themed after a rose and a helicopter.

In this Best Match form, Build is armed with the Batrotor Blade (バトローターブレード, Batorōtā Burēdo) which he can use to fly, or alternatively, use as a weapon.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): This finisher has two variations:

• Build removes the Batrotor Blade from his back, then covers it in red energy rose vines as it starts spinning before flying at the enemy for a slashing attack.^{[The Unstoppable Hazard]}
• During an experimental test conducted by Sento and Nariaki, Build flies with the Batrotor Blade on his back as he catches any escaping targets with the vine summoned by the Ibalash Arm before dragging his target to the spinning rotor to be sliced with.^{[Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~: First Chapter]}

Appearances: Build Episode 21, Raising the Hazard Level ~7 Best Matches~: First Chapter, Build 22

RoseSoujiki Form

RoseSoujiki Form

"Rose! Soujiki! Are you Ready?"

―RoseSoujiki's transformation announcement^[src]

Rider Statistics

• Rider Height: 190.0 cm
• Rider Weight: 93.2 kg

Ability Perimeters:

• Punching Power: 5.0 tons (right arm)/5.7 tons (left arm)
• Kicking Power: 9.6 tons (right leg)/8.5 tons (left leg)
• Maximum Jump Height: 31.8 m
• Maximum Running Speed: 100 m. per 5.7 sec.

RoseSoujiki Form (ローズ掃除機フォーム, Rōzu Sōjiki Fōmu) is Build's red and turquoise Trial Form accessed through the Rose and Soujiki Fullbottles, themed after a rose and a vacuum cleaner.

In this Trial Form, Build is armed with the Long Range Cleaner (ロングレンジクリーナー, Rongu Renji Kurīnā) on his left arm that can suck things in with high-velocity winds, and the Trash Converter (トラッシュコンバーター, Torasshu Konbātā) on his left shoulder that stores what has been sucked in.

This Trial Form gives Build the ability to absorb any elemental attacks using the Long Range Cleaner, and safely disarm the accumulated attack using the Trash Converter.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Appearances: Build Episode 21

RoseShoubousha Form

RoseShoubousha Form

"Rose! Shoubousha! Are you Ready?"

―RoseShoubousha's transformation announcement^[src]

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

RoseShoubousha Form (ローズ消防車フォーム, Rōzu Shōbōsha Fōmu) is Build's red and scarlet Trial Form accessed through the Rose and Shoubousha Fullbottles, themed after a rose and a fire engine.

In this Trial Form, Build is armed with the Multi Deluge Gun (マルチデリュージガン, Maruchi Deryūji Gan) on his left arm that can shoot water, fire, or extend.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Appearances: Build Episode 25

Trial Forms

"Rose! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

RoseTank Form

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RoseDiamond Form

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RoseGatling Form

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RoseComic Form

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RoseRocket Form

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RoseLock Form

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RoseDensya Form

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RoseLight Form

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RoseRobot Form

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RoseSmapho Form

RoseTelevi Form

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RoseGold Form

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RoseKeshigomu Form

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RoseWatch Form

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RoseReizoko Form

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RoseCamera Form

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RoseMic Form

RoseUFO Form

RoseSenpuki Form

RoseJet Form

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RoseBike Form

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RosePyramid Form

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RoseSukebo Form

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RoseDryer Form

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RoseSensuikan Form

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RoseF1 Form

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RoseMagnet Form

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RoseCake Form

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RoseUSB Memory Form

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RoseMedal Form

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RoseParka Form

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RoseGame Form

In any form that uses the Tora Fullbottle, Build can slash the opponent with the tiger claws on his right hand.

• UFO
• Others

ToraUFO Form

ToraUFO Form

"Tora! UFO! Best Match! Are you Ready? (Tropically Rock music) Mikakunin Jungle Hunter! ToraUFO! Yeahhh!"

―ToraUFO's transformation announcement^[src]

Rider Statistics

• Rider Height: 189.0 cm
• Rider Weight: 100.5 kg

Ability Perimeters:

• Punching Power: 17.8 tons (right arm)/5.1 tons (left arm)
• Kicking Power: 8.7 tons (right leg)/21.2 tons (left leg)
• Maximum Jump Height: 46.5 m
• Maximum Running Speed: 100 m. per 3.9 sec.

ToraUFO Form (トラユーフォーフォーム, Tora Yūfō Fōmu) is Build's marigold and pink Best Match form accessed with the Tora and UFO Fullbottles, hence known as the Unidentified Jungle Hunter (未確認ジャングルハンター, Mikakunin Janguru Hantā). It is themed after a tiger and a UFO.

In this form, Build's agility outmatches KaizokuRessya form, and RabbitTank Sparkling Form by a lot. He can generate a pink, energy UFO beneath him for hovering capabilities.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu).

Appearances: Raising the Hazard Level ~7 Best Matches~: Next Chapter, Build Episode 22

Trial Forms

"Tora! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

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ToraTank Form

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ToraDiamond Form

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ToraGatling Form

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ToraComic Form

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ToraRocket Form

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ToraShoubousha Form

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ToraSoujiki Form

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ToraLock Form

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ToraDensya Form

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ToraLight Form

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ToraRobot Form

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ToraSmapho Form

ToraTelevi Form

ToraHelicopter Form

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ToraGold Form

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ToraKeshigomu Form

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ToraWatch Form

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ToraReizoko Form

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ToraCamera Form

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ToraMic Form

ToraSenpuki Form

ToraJet Form

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ToraBike Form

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ToraPyramid Form

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ToraSukebo Form

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ToraDryer Form

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ToraSensuikan Form

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ToraF1 Form

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ToraMagnet Form

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ToraCake Form

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ToraUSB Memory Form

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ToraMedal Form

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ToraParka Form

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ToraGame Form

In any form that uses the Kujira Fullbottle, Build can perform a water blast with his right hand.

• Jet
• Others

KujiraJet Form

File:KujiraJetScan.jpg

KujiraJet Form

"Kujira! Jet! Best Match! Are you Ready? (Surfer Rock music) Amakakeru Big Wave! KujiraJet! Yeahhh!"

―KujiraJet's transformation announcement^[src]

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

KujiraJet Form (クジラジェットフォーム, Kujira Jetto Fōmu) is Build's navy and teal Best Match form accessed with the Kujira and Jet Fullbottles, hence known as the Sky-Flying Big Wave (天駆けるビッグウェーブ, Amakakeru Biggu Wēbu). It is themed after a whale and a jet plane.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu).

Appearances: Raising the Hazard Level ~7 Best Matches~: Next Chapter, Build Episode 22

Trial Forms

"Kujira! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

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KujiraTank Form

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KujiraDiamond Form

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KujiraGatling Form

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KujiraComic Form

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KujiraRocket Form

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KujiraShoubousha Form

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KujiraSoujiki Form

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KujiraLock Form

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KujiraDensya Form

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KujiraLight Form

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KujiraRobot Form

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KujiraSmapho Form

KujiraTelevi Form

KujiraHelicopter Form

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KujiraGold Form

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KujiraKeshigomu Form

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KujiraWatch Form

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KujiraReizoko Form

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KujiraCamera Form

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KujiraMic Form

KujiraUFO Form

KujiraSenpuki Form

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KujiraBike Form

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KujiraPyramid Form

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KujiraSukebo Form

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KujiraDryer Form

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KujiraSensuikan Form

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KujiraF1 Form

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KujiraMagnet Form

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KujiraCake Form

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KujiraUSB Memory Form

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KujiraMedal Form

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KujiraParka Form

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KujiraGame Form

In any form that uses the Kirin Fullbottle, Build can slash the opponent with the giraffe neck on his right hand.

• Senpuki
• Others

KirinCyclone Form

File:KirinCycloneScan.jpg

KirinCyclone Form

"Kirin! Senpuki! Best Match! Are you Ready? (Techno Rock music) Arashi o yobu kyotou! KirinCyclone! Yeahhh!"

―KirinCyclone's transformation announcement^[src]

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

KirinCyclone Form (キリンサイクロンフォーム, Kirin Saikuron Fōmu) is Build's gold and baby blue Best Match form accessed with the Kirin and Senpuki Fullbottles, hence known as the The Towering Storm-Caller (嵐を叫ぶ巨塔, Arashi o Yobu Kyotō). It is themed after a giraffe and an electric fan.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): Build summons an energy giraffe neck and attacks the enemy with it.

Appearances: Raising the Hazard Level ~7 Best Matches~: Next Chapter, Build Episode 22

Trial Forms

"Kirin! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

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KirinTank Form

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KirinDiamond Form

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KirinGatling Form

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KirinComic Form

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KirinRocket Form

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KirinShoubousha Form

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KirinSoujiki Form

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KirinLock Form

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KirinDensya Form

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KirinLight Form

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KirinRobot Form

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KirinSmapho Form

KirinTelevi Form

KirinHelicopter Form

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KirinGold Form

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KirinKeshigomu Form

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KirinWatch Form

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KirinReizoko Form

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KirinCamera Form

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KirinMic Form

KirinUFO Form

KirinJet Form

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KirinBike Form

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KirinPyramid Form

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KirinSukebo Form

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KirinDryer Form

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KirinSensuikan Form

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KirinF1 Form

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KirinMagnet Form

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KirinCake Form

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KirinUSB Memory Form

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KirinMedal Form

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KirinParka Form

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KirinGame Form

• RabbitTank Sparkling
• Hazard Trigger
• Genius

RabbitTank Sparkling Form

RabbitTank Sparkling Form

"RabbitTank Sparkling! Are you Ready? (Soda Can opening to Technical Rock music) Shuwatto Hajikeru! RabbitTank Sparkling! Yea-Yeahhh!"

―RabbitTank Sparkling's transformation announcement^[src]

Rider Statistics

• Rider Height: 202.0 cm
• Rider Weight: 102.1 kg

Ability Perimeters:

• Punching Power: 14.9 tons (right arm)/25.5 tons (left arm)
• Kicking Power: 35.6 tons (right leg)/26.7 tons (left leg)
• Maximum Jump Height: 66.0 m
• Maximum Running Speed: 100 m. per 2.0 sec.

RabbitTank Sparkling Form (ラビットタンクスパークリングフォーム, Rabitto Tanku Supākuringu Fōmu) is Build's carbonated soda upgrade form accessed with the RabbitTank Sparkling Fullbottle.

RabbitTank Sparkling, in comparison to RabbitTank, is a giant leap of improvement, literally. It can run faster than KaizokuRessya, jump higher than RabbitTank, and has a nice assortment of offensive power perimeters, with the right leg boasting more power then any of Build's previously introduced forms.

This form allows Build to use the Drill Crusher, Hawk Gatlinger, 4Koma Ninpoutou and Kaizoku Hassyar without restrictions.

This form has two finishers:

• Build Driver finisher:
  • Sparkling Finish (スパークリングフィニッシュ, Supākuringu Finisshu): This finisher has three variations:
    • Build delivers a powerful, bubbly kick attack at the enemy
    • Build leaps high into the air before creating a red and blue, spiraling, hourglass-shaped vortex resembling a wormhole. He then dives down through the wormhole, and kicks. The wormhole is also capable of sucking in and disintegrating opponents' attacks.
    • Build delivers a powerful, bubbly kick attack at the enemy from behind in close range.
• Kaizoku Hassyar finisher:
  • Kaizoku Densha (海賊電車, Kaizoku Densha): It is charged by pulling back the Build Arrow and holding it before letting go. While performing this finisher, the Kaizoku Hassyar announces Hassha (発射, Hassha lit. Fire).
    • Build fires a green and azure energy train from the Kaizoku Hassyar that not only rams into the enemy, but shoots azure energy discs as well.
• Build Driver + Drill Crusher finisher:
  • Sparkling Finish/Vortex Break (スパークリングフィニッシュ/ボルテックブレイク, Supākuringu Finisshu/Borutekku Bureiku): After plugging a Fullbottle into the Full Bottle Slot of the Drill Crusher, Build, in his RabbitTank Sparkling Form, can perform a powerful, bubbly finisher.
    • Blade: Build channels the energy of a Full Bottle in his Drill Crusher and performs a powerful slash.
      • Kabutomushi: The Drill Spiral Blade cloaks itself in an energy projection resembling a rhinoceros beetle's horn and performs a powerful, bubbly stab attack.

Appearances: Build Episode 14, Heisei Generations FINAL: Build & Ex-Aid with Legend Riders, Build 15-20, 22-25

• 1
• 2
• 3

"(Organic Fullbottle name)! (Inorganic Fullbottle name)! Super Best Match!"

―Activation Announcement^[src]

"Don Ten Kan! Don Ten Kan!"

―Looping Standby Announcement^[src]

"Gata Gata Gotton! Zuttan Zutan! Gata Gata Gotton! Zuttan Zutan! Are you Ready? (Oven's ding to Technical Rock music) Uncontrol Switch! Black Hazard! Yabei!"

―Hazard Form transformation announcement^[src]

By attaching the Hazard Trigger to the Build Driver, Build can upgrade any of his Best Match forms into a Hazard Form. This results in a base Hazard Form body with the eyes of the Best Match used. While Hazard Forms lack the unique equipment of a normal Best Match's Halfbodies, they still retain some access to their specific powers, and can use any handheld weapon tied to that Best Match.

The Hazard Trigger grants a massive strength, capable of destroying even a Hazard Smash with little effort, but usage of it puts the user at risk of losing self-awareness and going on a destructive rampage.

• RabbitTank
• SmaphoWolf
• HawkGatling
• KaizokuRessya
• Full Full RabbitTank Bottle

RabbitTank Hazard Form

RabbitTank Hazard Form

Rider Statistics

• Rider Height: 197.5 cm
• Rider Weight: 101.0 kg

Ability Perimeters:

• Punching Power: 19.8 tons (right arm)/34.0 tons (left arm)
• Kicking Power: 47.4 tons (right leg)/35.6 tons (left leg)
• Maximum Jump Height: 77.0 m
• Maximum Running Speed: 100 m. per 1.4 sec.

RabbitTank Hazard Form (ラビットタンクハザードフォーム, Rabitto Tanku Hazādo Fōmu) is Build's turbocharged super form accessed by upgrading RabbitTank Form with the Hazard Trigger.

In this form, Build's stats greatly surpass any other form, Rider, or Smash up to its appearance.

This form has two finishers:

• Overflow (オーバーフロー, Ōbāfurō): Build transfers surplus Nebula Gas into his HZ Deadly Gloves (ＨＺデッドリーグローブ, HZ Deddorī Gurōbu) and throws powerful punches and kicks. Additionally, Build also can simply touch the enemy for about several seconds to deliver electricity that paralyze the enemy.
• Hazard Finish (ハザードフィニッシュ, Hazādo Finisshu): Build coats his right HZ Vanish End Shoe (HZヴァニッシュエンドシューズ, HZ Vanisshu Endo Shūzu) in purple, dark energy before delivering a powerful kick.

Appearances: Build Episodes 20-25

SmaphoWolf Hazard Form

File:KRBu-Buildwolfsmapho Hazard.png

SmaphoWolf Hazard Form

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

SmaphoWolf Hazard Form (スマホウルフハザードフォーム, Sumaho Urufu Hazādo Fōmu) is Build's turbocharged super form accessed by upgrading SmaphoWolf Form with the Hazard Trigger.

From the Tu-Ka Face Module (ツーカーフェイスモジュール, Tsūkā Feisu Mojūru) (the phone icon on the right eye), Build is able to send a series of energy projections of app icons which encircle the enemy, disorienting and attacking them.

This forms has three finisher:

• Build Driver finishers:
  • Overflow (オーバーフロー, Ōbāfurō): Build transfers surplus Nebula Gas into his HZ Deadly Gloves (ＨＺデッドリーグローブ, HZ Deddorī Gurōbu) and delivers a powerful punch, summoning a wolf-like energy projection which "bites" down on the enemy.
  • Hazard Finish (ハザードフィニッシュ, Hazādo Finisshu):
• Drill Crusher finisher:
  • Vortex Break (ボルテックブレイク, Borutekku Bureiku):
    • Blade: Build channels the energy of a Fullbottle in his Drill Crusher and performs a powerful slash.
      • Unicorn: An energy projection resembling a unicorn's horn spins around the Drill Crusher as Build performs a powerful stab attack.

This form is exclusive to Raising the Hazard Level ~7 Best Matches~: First Chapter.

HawkGatling Hazard Form

HawkGatling Hazard Form

Rider Statistics

• Rider Height: 197.5 cm
• Rider Weight: 101.0 kg

Ability Perimeters:

• Punching Power: 19.4 tons (right arm)/20.4 tons (left arm)
• Kicking Power: 27.0 tons (right leg)/28.4 tons (left leg)
• Maximum Jump Height: 58.4 m
• Maximum Running Speed: 100 m. per 2.9 sec.

HawkGatling Hazard Form (ホークガトリングハザードフォーム, Hōku Gatoringu Hazādo Fōmu) is Build's turbocharged super form accessed by upgrading HawkGatling Form with the Hazard Trigger.

This form has two finishers:

• Overflow (オーバーフロー, Ōbāfurō): Build performs a series of blasts with the Hawk Gatlinger while flying around the enemy with the Solstall Wings.
• Hazard Finish (ハザードフィニッシュ, Hazādo Finisshu): Build traps the enemy in a black cloud and performs a series of purple blasts with the Hawk Gatlinger.

Appearances: Build Episode 22

KaizokuRessya Hazard Form

KaizokuRessya Hazard Form

Rider Statistics

• Rider Height: 197.5 cm
• Rider Weight: 101.0 kg

Ability Perimeters:

• Punching Power: 24.0 tons (right arm)/25.4 tons (left arm)
• Kicking Power: 30.0 tons (right leg)/27.6 tons (left leg)
• Maximum Jump Height: 55.2 m
• Maximum Running Speed: 100 m. per 1.3 sec.

KaizokuRessya Hazard Form (海賊レッシャハザードフォーム, Kaizoku Ressha Hazādo Fōmu) is Build's turbocharged super form accessed by upgrading KaizokuRessya Form with the Hazard Trigger.

This form has two finishers:

• Overflow (オーバーフロー, Ōbāfurō): Build repeatedly punches the enemy with his fists delivering purple shockwaves on impact.
• Hazard Finish (ハザードフィニッシュ, Hazādo Finisshu):

Appearances: Build Episode 24

Build uses the Full Full RabbitTank Bottle to upgrade Hazard Form into either RabbitRabbit Form or TankTank Form. Build's weapon in these forms is the Fullbottle Buster.

• RabbitRabbit
• TankTank

RabbitRabbit Form

RabbitRabbit Form

"Overflow! Kurenai no Speedy Jumper! RabbitRabbit! Yabei! Haei!"

―Transformation announcement^[src]

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

RabbitRabbit Form (ラビットラビットフォーム, Rabitto Rabitto Fōmu) is one of Build's upgraded super forms, based on the Rabbit Halfbody. It is accessed by upgrading RabbitTank Hazard Form with the Full Full RabbitTank Bottle, set to its Rabbit mode, hence known as the Crimson Speedy Jumper (紅のスピーディージャンパー, Kurenai no Supīdī Janpā).

In this form, Build can not only run faster, and jump higher than he could in RabbitTank Sparkling form, but he can also stretch his limbs at will.

Appearances: Build Episode TBA

TankTank Form

Tank Form

"Overflow! Koutetsu no Blue Warrior! TankTank! Yabei! Tsuei!"

―Transformation announcement^[src]

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

TankTank Form (タンクタンクフォーム, Tanku Tanku Fōmu) is one of Build's upgraded super forms, based on the Tank Halfbody. It is accessed by upgrading RabbitTank Hazard Form with the Full Full RabbitTank Bottle, set to its Tank mode, hence known as the Blue Warrior of Steel (鋼鉄のブルーウォーリアー, Kōtetsu no Burū U~ōriā).

In this form, Build's armor becomes significantly denser, and is covered in tank treads and turrets to boost his attacks.

Appearances: Build Episode TBA

Genius Form

Genius Form

"Yay! Yay! Yay! Yay! Yay! Yay! Are you Ready? Kanzen Muketsu no Bottle Yarou! Build Genius! Sugei! Monosugei!"

―Transformation announcement^[src]

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

Genius Form (ジーニアスフォーム, Jīniasu Fōmu) is Build's final form, accessed by using Genius Fullbottle in the Build Driver, hence known as the Completely Flawless Bottle Man (完全無欠のボトル野郎, Kanzen Muketsu no Botoru Yarō).

This form has three finishers:

• Genius Attack (ジーニアスアタック, Jīniasu Attaku)
• Genius Break (ジーニアスブレイク, Jīniasu Bureiku)
• Genius Finish (ジーニアスフィニッシュ, Jīniasu Finisshu)

Appearances: Build Episode TBA

These forms are accessed through Fullbottles either not used or unavailable in the main series and are exclusive to specials or spin-off installments.

• Kuma
• Same
• Scorpion
• Hachi
• Sai
• Rabbit

• Televi
• Others

KumaTelevi Form

File:Kumatelevi.PNG

KumaTelevi Form

"Kuma! Televi! Best Match! Are you Ready? Hachimitsu High Vision! KumaTelevi! Yeahhh!"

―KumaTelevi's transformation announcement^[src]

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

KumaTelevi Form (クマテレビフォーム, Kuma Terebi Fōmu) is Build's marigold and gunmetal gray Best Match form accessed with the Kuma and Televi Fullbottles, hence known as the Honey High Vision (はちみつハイビジョン, Hachimitsu Hai Bijon). It is themed after a bear and a television.

In this form, Build gains assistance from an AI in the suit known as Televi-san (てれびさん, Terebisan). He can also temporarily enlarge himself simply by projecting an energy barrier in the shape of the bear crossing sign on his chest, and then running through it.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu): Build throws a ball of honey-like energy at the enemy that solidifies in front of it before running up to the enemy for a slashing maneuver with his claws.

This form is exclusive to Kamen Rider Build: Birth! KumaTelevi!! VS Kamen Rider Grease!.

Trial Forms

"Kuma! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

KumaTank Form

KumaDiamond Form

KumaGatling Form

KumaComic Form

KumaRocket Form

KumaShoubousha Form

KumaSoujiki Form

KumaLock Form

KumaDensya Form

KumaLight Form

KumaRobot Form

KumaSmapho Form

KumaHelicopter Form

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KumaGold Form

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KumaKeshigomu Form

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KumaWatch Form

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KumaReizoko Form

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KumaCamera Form

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KumaMic Form

KumaUFO Form

KumaSenpuki Form

KumaJet Form

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KumaBike Form

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KumaPyramid Form

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KumaSukebo Form

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KumaDryer Form

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KumaSensuikan Form

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KumaF1 Form

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KumaMagnet Form

KumaCake Form

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KumaUSB Memory Form

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KumaMedal Form

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KumaParka Form

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KumaGame Form

• Bike
• Others

SameBike Form

File:SameBike.png

SameBike Form

"Same! Bike! Best Match! Are you Ready? (Surfer Rock music) Dokusou Hunter! SameBike! Yeahhh!"

―SameBike's transformation announcement^[src]

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

SameBike Form (サメバイクフォーム, Same Baiku Fōmu) is Build's navy and scarlet Best Match form accessed with the Same and Bike Fullbottles, hence known as the Solo-running Hunter (独走ハンター, Dokusō Hantā). It is themed after a shark and the Machine Builder.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu).

This form is exclusive to Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~.

Trial Forms

"Same! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

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SameTank Form

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SameDiamond Form

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SameGatling Form

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SameComic Form

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SameRocket Form

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SameShoubousha Form

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SameSoujiki Form

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SameLock Form

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SameDensya Form

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SameLight Form

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SameRobot Form

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SameSmapho Form

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SameTelevi Form

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SameHelicopter Form

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SameGold Form

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SameKeshigomu Form

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SameWatch Form

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SameReizoko Form

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SameCamera Form

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SameMic Form

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SameUFO Form

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SameSenpuki Form

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SameJet Form

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SamePyramid Form

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SameSukebo Form

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SameDryer Form

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SameSensuikan Form

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SameF1 Form

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SameMagnet Form

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SameCake Form

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SameUSB Memory Form

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SameMedal Form

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SameParka Form

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SameGame Form

• Gold
• Others

GoldScorpion Form

File:GoldScorpionForm.jpg

GoldScorpion Form

"Scorpion! Gold! Best Match! Are you Ready? (Egyptian Rock music) Kouki naru Dokubari! GoldScorpion! Yeahhh!"

―GoldScorpion's transformation announcement^[src]

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

GoldScorpion Form (ゴールドスコーピオンフォーム, Gōrudo Sukōpion Fōmu) is Build's maroon and gold Best Match form accessed with the Scorpion and Gold Fullbottles, hence known as the Noble Stinger (高貴なる毒針, Kōki naru Dokubari). It is themed after a scorpion and gold.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu).

Trial Forms

"Scorpion! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

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ScorpionTank Form

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ScorpionDiamond Form

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ScorpionGatling Form

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ScorpionComic Form

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ScorpionRocket Form

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ScorpionShoubousha Form

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ScorpionSoujiki Form

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ScorpionLock Form

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ScorpionDensya Form

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ScorpionLight Form

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ScorpionRobot Form

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ScorpionSmapho Form

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ScorpionTelevi Form

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ScorpionHelicopter Form

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ScorpionKeshigomu Form

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ScorpionWatch Form

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ScorpionReizoko Form

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ScorpionCamera Form

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ScorpionMic Form

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ScorpionUFO Form

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ScorpionSenpuki Form

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ScorpionJet Form

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ScorpionBike Form

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ScorpionPyramid Form

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ScorpionSukebo Form

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ScorpionDryer Form

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ScorpionSensuikan Form

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ScorpionF1 Form

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ScorpionMagnet Form

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ScorpionCake Form

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ScorpionUSB Memory Form

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ScorpionMedal Form

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ScorpionParka Form

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ScorpionGame Form

• Sensuikan
• Others

HachiMarine Form

HachiMarine Form

"Hachi! Sensuikan! Best Match! Are you Ready? Shinkai no Shigotonin! HachiMarine! Yeahhh!"

―HachiMarine's transformation announcement^[src]

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

HachiMarine Form (ハチマリンフォーム, Hachi Marin Fōmu) is Build's electric yellow and skyblue Best Match form accessed with the Hachi and Sensuikan Fullbottles, hence known as the Deep Sea Worker (深海の仕事人, Shinkai no Shigotonin). It is themed after a bee and a submarine.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu).

Trial Forms

"Hachi! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

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HachiTank Form

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HachiDiamond Form

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HachiGatling Form

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HachiComic Form

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HachiRocket Form

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HachiShoubousha Form

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HachiSoujiki Form

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HachiLock Form

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HachiDensya Form

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HachiLight Form

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HachiRobot Form

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HachiSmapho Form

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HachiTelevi Form

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HachiHelicopter Form

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HachiGold Form

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HachiKeshigomu Form

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HachiWatch Form

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HachiReizoko Form

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HachiCamera Form

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HachiMic Form

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HachiUFO Form

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HachiSenpuki Form

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HachiJet Form

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HachiBike Form

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HachiPyramid Form

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HachiSukebo Form

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HachiDryer Form

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HachiF1 Form

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HachiMagnet Form

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HachiCake Form

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HachiUSB Memory Form

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HachiMedal Form

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HachiParka Form

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HachiGame Form

• Dryer
• Others

SaiDryer Form

SaiDryer Form

"Sai! Dryer! Best Match! Are you Ready? (Upbeat Pop music) Chou Netsu Tairiku! SaiDryer! Yeahhh!"

―SaiDryer's transformation announcement^[src]

Rider Statistics

• Rider Height:
• Rider Weight:

Ability Perimeters:

• Punching Power:
• Kicking Power:
• Maximum Jump Height:
• Maximum Running Speed:

SaiDryer Form (サイドライヤーフォーム, Sai Doraiyā Fōmu) is Build's grey and scarlet Best Match form accessed with the Sai and Dryer Fullbottles, hence known as the Super Heating Continent (超熱大陸, Chō Netsu Tairiku). It is themed after a rhinoceros and a hair dryer.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu).

Trial Forms

"Sai! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

These forms have yet to appear in any episode, movie, or special.

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SaiTank Form

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SaiDiamond Form

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SaiGatling Form

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SaiComic Form

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SaiRocket Form

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SaiShoubousha Form

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SaiSoujiki Form

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SaiLock Form

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SaiDensya Form

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SaiLight Form

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SaiRobot Form

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SaiSmapho Form

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SaiTelevi Form

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SaiHelicopter Form

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SaiGold Form

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SaiKeshigomu Form

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SaiWatch Form

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SaiReizoko Form

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SaiCamera Form

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SaiMic Form

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SaiUFO Form

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SaiSenpuki Form

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SaiJet Form

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SaiBike Form

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SaiPyramid Form

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SaiSukebo Form

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SaiSensuikan Form

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SaiF1 Form

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SaiMagnet Form

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SaiCake Form

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SaiUSB Memory Form

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SaiMedal Form

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SaiParka Form

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SaiGame Form

• Dragon

File:RabbitDragon.png

RabbitDragon form is Build's upcoming silver and gold movie-exclusive form, presumably obtained by using the Rabbit and Dragon fullbottles. Little information is known about this form at this time.

These Forms are exclusive to Kamen Rider Battle: Ganbarizing.

• Santa Claus
• Obake
• Kabutomushi
• Dog
• Unicorn
• Turtle
• Momotaros
• Rider Card
• Tantei
• Yujou
• Mahoutsukai
• Orange
• Doctor

• Cake
• Others

MerryChristmas Form

File:Build Chrismas.jpg

MerryChristmas Form

"Santa Claus! Cake! Best Match! Are you Ready? (Christmas music) Seinaru Shisha! MerryChristmas! Yeahhh!"

―MerryChristmas's transformation announcement^[src]

MerryChristmas Form (メリークリスマスフォーム, Merī Kurisumasu Fōmu) is Build's red and cream Best Match form accessed with the Santa Claus and Cake Fullbottles, hence known as the The Holy Envoy (聖なる使者, Seinaru Shisha). It is themed after Santa Claus and a cake.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu).

Trial Forms

"Santa Claus! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

Santa ClausTank Form

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Santa ClausDiamond Form

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Santa ClausGatling Form

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Santa ClausComic Form

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Santa ClausRocket Form

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Santa ClausShoubousha Form

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Santa ClausSoujiki Form

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Santa ClausLock Form

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Santa ClausDensya Form

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Santa ClausLight Form

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Santa ClausRobot Form

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Santa ClausSmapho Form

Santa ClausTelevi Form

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Santa ClausHelicopter Form

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Santa ClausGold Form

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Santa ClausKeshigomu Form

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Santa ClausWatch Form

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Santa ClausReizoko Form

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Santa ClausCamera Form

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Santa ClausMic Form

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Santa ClausUFO Form

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Santa ClausSenpuki Form

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Santa ClausJet Form

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Santa ClausBike Form

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Santa ClausPyramid Form

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Santa ClausSukebo Form

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Santa ClausDryer Form

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Santa ClausSensuikan Form

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Santa ClausF1 Form

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Santa ClausMagnet Form

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Santa ClausUSB Memory Form

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Santa ClausMedal Form

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Santa ClausParka Form

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Santa ClausGame Form

Obake's main Best Match form, with Magnet, has yet to be teased. It also has a Legend Rider Best Match with Parka as Ghost Form.

• Others

Trial Forms

"Obake! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

ObakeTank Form

ObakeDiamond Form

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ObakeGatling Form

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ObakeComic Form

ObakeRocket Form

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ObakeShoubousha Form

ObakeSoujiki Form

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ObakeLock Form

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ObakeDensya Form

ObakeLight Form

ObakeRobot Form

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ObakeSmapho Form

ObakeTelevi Form

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ObakeHelicopter Form

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ObakeGold Form

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ObakeKeshigomu Form

ObakeWatch Form

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ObakeReizoko Form

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ObakeCamera Form

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ObakeMic Form

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ObakeUFO Form

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ObakeSenpuki Form

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ObakeJet Form

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ObakeBike Form

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ObakePyramid Form

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ObakeSukebo Form

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ObakeDryer Form

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ObakeSensuikan Form

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ObakeF1 Form

ObakeCake Form

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ObakeUSB Memory Form

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ObakeMedal Form

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ObakeGame Form

• Camera
• Others

BeetleCamera Form

File:BeetleCamera.jpg

BeetleCamera Form

"Kabutomushi! Camera! Best Match! Are you Ready? Mitsurin no Scoop King! BeetleCamera! Yeahhh!"

―BeetleCamera's transformation announcement^[src]

BeetleCamera Form (ビートルカメラフォーム, Bītoru Kamera Fōmu) is Build's orange and blue Best Match form accessed with the Kabutomushi and Camera Fullbottles, hence known as the Scoop King of the Forest (密林のスクープキング, Mitsurin no Sukūpu Kingu). It is themed after a rhinoceros beetle and a camera.

Trial Forms

"Kabutomushi! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

KabutomushiTank Form

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KabutomushiDiamond Form

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KabutomushiGatling Form

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KabutomushiComic Form

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KabutomushiRocket Form

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KabutomushiShoubousha Form

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KabutomushiSoujiki Form

KabutomushiLock Form

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KabutomushiDensya Form

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KabutomushiLight Form

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KabutomushiRobot Form

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KabutomushiSmapho Form

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KabutomushiTelevi Form

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KabutomushiHelicopter Form

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KabutomushiGold Form

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KabutomushiKeshigomu Form

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KabutomushiWatch Form

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KabutomushiReizoko Form

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KabutomushiMic Form

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KabutomushiUFO Form

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KabutomushiSenpuki Form

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KabutomushiJet Form

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KabutomushiBike Form

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KabutomushiPyramid Form

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KabutomushiSukebo Form

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KabutomushiDryer Form

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KabutomushiSensuikan Form

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KabutomushiF1 Form

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KabutomushiMagnet Form

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KabutomushiCake Form

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KabutomushiUSB Memory Form

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KabutomushiMedal Form

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KabutomushiParka Form

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KabutomushiGame Form

• Mic
• Others

DogMic Form

File:Build-DogMic.png

DogMic Form

"Dog! Mic! Best Match! Are you Ready? Iyashi no Daibakuon! DogMic! Yeahhh!"

―DogMic's transformation announcement^[src]

DogMic Form (ドッグマイクフォーム, Doggu Maiku Fōmu) is Build's sienna and silver Best Match form accessed with the Dog and Mic Fullbottles, hence known as the Great Roar of Comfort (癒しの大爆音, Iyashi no Daibakuon). It is themed after a dog and a microphone.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu).

Trial Forms

"Dog! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

DogTank Form

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DogDiamond Form

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DogGatling Form

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DogComic Form

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DogRocket Form

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DogShoubousha Form

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DogSoujiki Form

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DogLock Form

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DogDensya Form

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DogLight Form

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DogRobot Form

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DogSmapho Form

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DogTelevi Form

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DogHelicopter Form

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DogGold Form

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DogKeshigomu Form

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DogWatch Form

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DogReizoko Form

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DogCamera Form

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DogUFO Form

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DogSenpuki Form

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DogJet Form

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DogBike Form

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DogPyramid Form

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DogSukebo Form

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DogDryer Form

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DogSensuikan Form

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DogF1 Form

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DogMagnet Form

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DogCake Form

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DogUSB Memory Form

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DogMedal Form

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DogParka Form

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DogGame Form

• Keshigomu
• Others

UniRaser Form

File:Build UniRaser.png

UniRaser Form

"Unicorn! Keshigomu! Best Match! Are you Ready? (Classical music) Ikkaku Shoukyou! UniRaser! Yeahhh!"

―UniRaser's transformation announcement^[src]

UniRaser Form (ユニレイサーフォーム, Yuni Reisā Fōmu) is Build's skyblue and white Best Match form accessed with the Unicorn and Keshigomu Fullbottles, hence known as the One Horned Erasure (一角消去, Ikkaku Shōkyo). It is themed after an unicorn and a eraser.

Trial Forms

"Unicorn! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

UnicornTank Form

UnicornDiamond Form

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UnicornGatling Form

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UnicornComic Form

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UnicornRocket Form

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UnicornShoubousha Form

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UnicornSoujiki Form

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UnicornLock Form

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UnicornDensya Form

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UnicornLight Form

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UnicornRobot Form

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UnicornSmapho Form

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UnicornTelevi Form

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UnicornHelicopter Form

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UnicornGold Form

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UnicornWatch Form

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UnicornReizoko Form

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UnicornCamera Form

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UnicornMic Form

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UnicornUFO Form

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UnicornSenpuki Form

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UnicornJet Form

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UnicornBike Form

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UnicornPyramid Form

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UnicornSukebo Form

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UnicornDryer Form

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UnicornSensuikan Form

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UnicornF1 Form

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UnicornMagnet Form

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UnicornCake Form

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UnicornUSB Memory Form

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UnicornMedal Form

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UnicornParka Form

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UnicornGame Form

• Watch
• Others

TurtleWatch Form

File:Build TurtleWatch.png

TurtleWatch Form

"Turtle! Watch! Best Match! Are you Ready? Toki o Kakeru Katchuu! TurtleWatch! Yeahhh!"

―TurtleWatch's transformation announcement^[src]

TurtleWatch Form (タートルウォッチフォーム, Tātoru Wocchi Fōmu) is Build's green and white Best Match form accessed with the Turtle and Watch Fullbottles, hence known as the Armored Time Hopper (時を駆ける甲冑, Toki o kakeru katchū). It is themed after a turtle and a watch.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu).

This form was intended to be used by Build in episode 21, though the scene was cut before the transformation was finished.

Trial Forms

"Turtle! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

TurtleTank Form

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TurtleDiamond Form

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TurtleGatling Form

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TurtleComic Form

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TurtleRocket Form

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TurtleShoubousha Form

TurtleSoujiki Form

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TurtleLock Form

TurtleDensya Form

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TurtleLight Form

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TurtleRobot Form

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TurtleSmapho Form

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TurtleTelevi Form

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TurtleHelicopter Form

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TurtleGold Form

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TurtleKeshigomu Form

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TurtleReizoko Form

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TurtleCamera Form

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TurtleMic Form

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TurtleUFO Form

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TurtleSenpuki Form

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TurtleJet Form

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TurtleBike Form

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TurtlePyramid Form

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TurtleSukebo Form

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TurtleDryer Form

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TurtleSensuikan Form

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TurtleF1 Form

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TurtleMagnet Form

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TurtleCake Form

TurtleUSB Memory Form

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TurtleMedal Form

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TurtleParka Form

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TurtleGame Form

Momotaros's only Best Match form, with Densya, is a Legend Rider Best Match as Den-O Form.

• Others

Trial Forms

"Momotaros! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

MomotarosTank Form

MomotarosDiamond Form

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MomotarosGatling Form

MomotarosComic Form

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MomotarosRocket Form

MomotarosShoubousha Form

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MomotarosSoujiki Form

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MomotarosLock Form

MomotarosLight Form

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MomotarosRobot Form

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MomotarosSmapho Form

MomotarosTelevi Form

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MomotarosHelicopter Form

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MomotarosGold Form

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MomotarosKeshigomu Form

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MomotarosWatch Form

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MomotarosReizoko Form

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MomotarosCamera Form

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MomotarosMic Form

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MomotarosUFO Form

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MomotarosSenpuki Form

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MomotarosJet Form

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MomotarosBike Form

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MomotarosPyramid Form

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MomotarosSukebo Form

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MomotarosDryer Form

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MomotarosSensuikan Form

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MomotarosF1 Form

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MomotarosMagnet Form

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MomotarosCake Form

MomotarosUSB Memory Form

MomotarosMedal Form

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MomotarosParka Form

MomotarosGame Form

Rider Card's only Best Match form, with Camera, is a Legend Rider Best Match as Decade Form.

• Others

Trial Forms

"Card! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

CardTank Form

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CardDiamond Form

CardGatling Form

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CardComic Form

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CardRocket Form

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CardShoubousha Form

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CardSoujiki Form

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CardLock Form

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CardDensya Form

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CardLight Form

CardRobot Form

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CardSmapho Form

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CardTelevi Form

CardHelicopter Form

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CardGold Form

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CardKeshigomu Form

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CardWatch Form

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CardReizoko Form

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CardMic Form

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CardUFO Form

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CardSenpuki Form

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CardJet Form

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CardBike Form

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CardPyramid Form

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CardSukebo Form

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CardDryer Form

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CardSensuikan Form

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CardF1 Form

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CardMagnet Form

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CardCake Form

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CardUSB Memory Form

CardMedal Form

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CardParka Form

CardGame Form

Tantei's only Best Match form, with USB Memory, is a Legend Rider Best Match as W Form.

• Others

Trial Forms

"Tantei! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

TanteiTank Form

TanteiDiamond Form

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TanteiGatling Form

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TanteiComic Form

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TanteiRocket Form

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TanteiShoubousha Form

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TanteiSoujiki Form

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TanteiLock Form

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TanteiDensya Form

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TanteiLight Form

TanteiRobot Form

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TanteiSmapho Form

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TanteiTelevi Form

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TanteiHelicopter Form

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TanteiGold Form

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TanteiKeshigomu Form

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TanteiWatch Form

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TanteiReizoko Form

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TanteiCamera Form

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TanteiMic Form

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TanteiUFO Form

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TanteiSenpuki Form

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TanteiJet Form

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TanteiBike Form

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TanteiPyramid Form

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TanteiSukebo Form

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TanteiDryer Form

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TanteiSensuikan Form

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TanteiF1 Form

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TanteiMagnet Form

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TanteiCake Form

TanteiMedal Form

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TanteiParka Form

TanteiGame Form

Yujou's only Best Match form, with Rocket, is a Legend Rider Best Match as Fourze Form.

• Others

Trial Forms

"Yujou! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

YujouTank Form

YujouDiamond Form

YujouGatling Form

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YujouComic Form

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YujouShoubousha Form

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YujouSoujiki Form

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YujouLock Form

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YujouDensya Form

YujouLight Form

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YujouRobot Form

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YujouSmapho Form

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YujouTelevi Form

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YujouHelicopter Form

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YujouGold Form

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YujouKeshigomu Form

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YujouWatch Form

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YujouReizoko Form

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YujouCamera Form

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YujouMic Form

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YujouUFO Form

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YujouSenpuki Form

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YujouJet Form

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YujouBike Form

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YujouPyramid Form

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YujouSukebo Form

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YujouDryer Form

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YujouSensuikan Form

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YujouF1 Form

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YujouMagnet Form

YujouCake Form

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YujouUSB Memory Form

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YujouMedal Form

YujouParka Form

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YujouGame Form

Mahoutsukai's only Best Match form, with Diamond, is a Legend Rider Best Match as Wizard Form.

• Others

Trial Forms

"Mahoutsukai! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

MahoutsukaiTank Form

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MahoutsukaiGatling Form

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MahoutsukaiComic Form

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MahoutsukaiRocket Form

MahoutsukaiShoubousha Form

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MahoutsukaiSoujiki Form

MahoutsukaiLock Form

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MahoutsukaiDensya Form

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MahoutsukaiLight Form

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MahoutsukaiRobot Form

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MahoutsukaiSmapho Form

MahoutsukaiTelevi Form

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MahoutsukaiHelicopter Form

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MahoutsukaiGold Form

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MahoutsukaiKeshigomu Form

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MahoutsukaiWatch Form

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MahoutsukaiReizoko Form

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MahoutsukaiCamera Form

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MahoutsukaiMic Form

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MahoutsukaiUFO Form

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MahoutsukaiSenpuki Form

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MahoutsukaiJet Form

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MahoutsukaiBike Form

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MahoutsukaiPyramid Form

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MahoutsukaiSukebo Form

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MahoutsukaiDryer Form

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MahoutsukaiSensuikan Form

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MahoutsukaiF1 Form

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MahoutsukaiMagnet Form

MahoutsukaiCake Form

MahoutsukaiUSB Memory Form

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MahoutsukaiMedal Form

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MahoutsukaiParka Form

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MahoutsukaiGame Form

Orange's only Best Match form, with Lock, is a Legend Rider Best Match as Gaim Form.

• Others

Trial Forms

"Orange! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

OrangeTank Form

OrangeDiamond Form

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OrangeGatling Form

OrangeComic Form

OrangeRocket Form

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OrangeShoubousha Form

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OrangeSoujiki Form

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OrangeDensya Form

OrangeLight Form

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OrangeRobot Form

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OrangeSmapho Form

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OrangeTelevi Form

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OrangeHelicopter Form

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OrangeGold Form

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OrangeKeshigomu Form

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OrangeWatch Form

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OrangeReizoko Form

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OrangeCamera Form

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OrangeMic Form

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OrangeUFO Form

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OrangeSenpuki Form

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OrangeJet Form

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OrangeBike Form

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OrangePyramid Form

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OrangeSukebo Form

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OrangeDryer Form

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OrangeSensuikan Form

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OrangeF1 Form

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OrangeMagnet Form

OrangeCake Form

OrangeUSB Memory Form

OrangeMedal Form

OrangeParka Form

OrangeGame Form

• Game
• Others

DoctorGame Form

DoctorGame Form

DoctorGame Form (ドクターゲームフォーム, Dokutā Gēmu Fōmu) is Build's white and pink imaginary Best Match form accessed with the Doctor and Game Fullbottles. It is themed after a doctor and a video game. This form is impossible to take normally as Doctor and Game are a Legend Rider Best Match and would directly access Ex-Aid Form instead. However, this form is featured exclusively in Kamen Rider Buttobasoul.

As a Best Match, this form's finisher is the Vortex Finish (ボルテックフィニッシュ, Borutekku Finisshu).

Trial Forms

"Doctor! (Inorganic Fullbottle name)! Are you Ready?"

―Trial Forms' transformation announcement^[src]

As mismatched forms, the finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku).

DoctorTank Form

DoctorDiamond Form

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DoctorGatling Form

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DoctorComic Form

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DoctorRocket Form

DoctorShoubousha Form

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DoctorSoujiki Form

DoctorLock Form

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DoctorDensya Form

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DoctorLight Form

DoctorRobot Form

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DoctorSmapho Form

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DoctorTelevi Form

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DoctorHelicopter Form

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DoctorGold Form

DoctorKeshigomu Form

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DoctorWatch Form

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DoctorReizoko Form

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DoctorCamera Form

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DoctorMic Form

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DoctorUFO Form

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DoctorSenpuki Form

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DoctorJet Form

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DoctorBike Form

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DoctorPyramid Form

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DoctorSukebo Form

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DoctorDryer Form

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DoctorSensuikan Form

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DoctorF1 Form

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DoctorMagnet Form

DoctorCake Form

DoctorUSB Memory Form

DoctorMedal Form

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DoctorParka Form

Unlike any Legend Rider forms since Decade, Build directly takes the previous Riders' forms, aside from keeping the Build Driver, instead of taking a form invoking them that resembles Build's own armor pattern.

• Ex-Aid
• Den-O
• Ghost
• Gaim
• Wizard
• Fourze
• OOO
• W
• Decade

Ex-Aid Form

File:DG BestMatch.png

Ex-Aid Form

"Doctor! Game! Best Match! Are you Ready? Ex-Aid! Mighty Jump! Mighty Kick! Mighty, Mighty Action X!"

―Ex-Aid Form's transformation announcement^[src]

Ex-Aid Form (エグゼイドフォーム, Eguzeido Fōmu) is Build's Legend Rider form themed after Kamen Rider Ex-Aid Action Gamer Level 2. It is accessed with the Doctor and Game Fullbottles.

In this form, he gains enhanced fighting ability similar to Ex-Aid and access to the Gashacon Breaker. However, while the Gashacon Key Slasher isn't used by this form in any movies, series, or specials, it is in the DX toyline.

This form is exclusive to Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders.

Den-O Form

Den-O Form

"Momotaros! Densya! Best Match! Are you Ready? Den-O! (Den-O Sword Form music)"

―Den-O Form's transformation announcement^[src]

Den-O Form (電王フォーム, Den-Ō Fōmu) is Build's Legend Rider form themed after Kamen Rider Den-O Sword Form. It is accessed with the Momotaros and Densya Fullbottles.

In this form, he gains access to the DenGasher.

Ghost Form

Ghost Form

"Obake! Parka! Best Match! Are you Ready? Ghost! Let's Go! Kakugo! Go-Go-Go-Ghost! Go! Go! Go! Go!"

―Ghost Form's transformation announcement^[src]

Ghost Form (ゴーストフォーム, Gōsuto Fōmu) is Build's Legend Rider form themed after Kamen Rider Ghost Ore Damashii. It is accessed with the Obake and Parka Fullbottles.

In this form, he gains access to the Gan Gun Saber.

Gaim Form

Gaim Form

"Orange! Lock! Best Match! Are you Ready? Gaim! Orange Arms: Hanamichi on Stage!"

―Gaim Form's transformation announcement^[src]

Gaim Form (鎧武フォーム, Gaimu Fōmu) is Build's Legend Rider form themed after Kamen Rider Gaim Orange Arms. It is accessed with the Orange and Lock Fullbottles.

In this form, he gains access to the Daidaimaru and Musou Saber.

Wizard Form

Wizard Form

"Mahoutsukai! Diamond! Best Match! Are you Ready? Wizard! Please! Hii, Hii, Hii-Hii-Hii!"

―Wizard Form's transformation announcement^[src]

Wizard Form (ウィザードフォーム, Wizādo Fōmu) is Build's Legend Rider form themed after Kamen Rider Wizard Flame Style. It is accessed with the Mahoutsukai and Diamond Fullbottles.

In this form, he gains access to the WizarSwordGun.

Fourze Form

Fourze Form

"Yujou! Rocket! Best Match! Are you Ready? Fourze! (Techno space music)"

―Fourze Form's transformation announcement^[src]

Fourze Form (フォーゼフォーム, Fōze Fōmu) is Build's Legend Rider form themed after Kamen Rider Fourze Base States. It is accessed with the Yujou and Rocket Fullbottles.

In this form, he gains access to Rocket & Drill Modules.

OOO Form

OOO Form

"Taka! Medal! Best Match! Are you Ready? OOO! Ta-To-Ba! Tatoba, Ta-To-Ba!"

―OOO Form's transformation announcement^[src]

OOO Form (オーズフォーム, Ōzu Fōmu) is Build's Legend Rider form themed after Kamen Rider OOO Tatoba Combo. It is accessed with the Taka and Medal Fullbottles.

In this form, he gains access to Medajalibur and Medagabryu.

Double Form

W Form

"Tantei! USB Memory! Best Match! Are you Ready? W! (Technical guitar to orchestral hit)"

―W Form's transformation announcement^[src]

W Form (Ｗフォーム, Daburu Fōmu) is Build's Legend Rider form themed after Kamen Rider Double CycloneJoker. It is accessed with the Tantei and USB Memory Fullbottles.

Decade Form

Decade Form

"Card! Camera! Best Match! Are you Ready? Decade!"

―Decade Form's transformation announcement^[src]

Decade Form (ディケイドフォーム, Dikeido Fōmu) is Build's Legend Rider form themed after Kamen Rider Decade. It is accessed with the Card and Camera Fullbottles.

In this form, he gains access to the Ride Booker.

Notably, the right-side Fullbottle used by this form, Rider Card, isn't directly something organic like it normally is, but instead something inorganic (card) that represents something organic (Rider).

This form is exclusive to a YouTube net series.

Equipment

Devices

• Build Driver - Transformation device.
• Fullbottles - Transformation trinkets.
• Fullbottle Holder - Carrier strap for Build's Fullbottles
• Build Phone - Build's personal smartphone that can transform into the Machine Builder.
• Hazard Trigger - Build's power up device, used to upgrade any Best Match Form into a Hazard Form by attaching it to the Build Driver.

Weapons

• Handheld weapons
  • Drill Crusher - Build's personal drill-like weapon
  • Hawk Gatlinger - Build's gatling rifle-like weapon accessed by any form that uses the Gatling Fullbottle.
  • 4Koma Ninpoutou - Build's katana-like weapon accessed by any form that uses the Ninjya or Comic Fullbottle.
  • Kaizoku Hassyar - Build's bladed bow-like weapon accessed by any form that uses the Kaizoku Fullbottle.
  • Fullbottle Buster - Build's personal sword-like and pump-action shotgun-like weapon, accessed by any form that uses the Full Full RabbitTank Bottle.
• Form-based weapons
  • Rabbit Foot Shoes - Build's rabbit-like spring shoe accessed by any form that uses the Rabbit Fullbottle and in RabbitTank Sparkling Form.
  • Tank Roller Shoes - Build's tank-like tread shoe accessed by any form that uses the Tank Fullbottle and in RabbitTank Sparkling Form.
  • Muscle Glove - Build's gorilla-like tekko accessed by any form that uses the Gorilla Fullbottle.
  • BLD Prism Glove - Build's diamond-like glove accessed by any form that uses the Diamond Fullbottle.
  • Solstall Wings - Build's hawk-like wings accessed by any form that uses the Taka Fullbottle.
  • Giant Scratcher - Build's panda-like gauntlet accessed by any form that uses the Panda Fullbottle.
  • Space Ride Arm - Build's rocket-like missile accessed by any form that uses the Rocket Fullbottle.
  • Spine Knuckle - Build's hedgehog-like tekko accessed by any form that uses the Harinezumi Fullbottle.
  • Multi Deluge Gun - Build's fire engine-like hose accessed by any form that uses the Shoubousha Fullbottle.
  • Gold Lio Gauntlet - Build's lion-like gauntlet accessed by any form that uses the Lion Fullbottle.
  • Long Range Cleaner and Trash Converter - Build's vacuum cleaner-like weapons accessed by any form that uses the Soujiki Fullbottle.
  • Bind Master Key - Build's key-like accessory/batting weapon accessed by any form that uses the Lock Fullbottle.
  • Train Gauntlet - Build's train-like wrist guard accessed by any form that uses the Densya Fullbottle.
  • Twist Lash Arm - Build's octopus-like whips accessed by any form that uses the Octopus Fullbottle.
  • Shade Breaker and BLD Light Bulb Shoulder - Build's light bulb and circuit breaker-like weapons accessed by any form that uses the Light Fullbottle.
  • Flame Reviber and Empirial Wings - Build's phoenix-like weapons accessed by any form that uses the Phoenix Fullbottle.
  • Demolition One and BLD Arsenal Shoulder - Build's robot-like weapons accessed by any form that uses the Robot Fullbottle.
  • Wolfatal Claw - Build's wolf-like claws accessed by any form that uses the Wolf Fullbottle.
  • Build Pad Shield - Build's smartphone-like shield accessed by any form using the Smapho Fullbottle.
  • Ibalash Arm - Build's rose-like gauntlet accessed by any form using the Rose Fullbottle.
  • Batrotor Blade - Build's helicopter rotor-like staff accessed by any form using the Helicopter Fullbottle.
  • HZ Deadly Gloves - Build's gloves in any of the Hazard Forms.
  • HZ Vanish End Shoe - Build's boots in any of the Hazard Forms.

Vehicles

• Machine Builder - Build's personal Rider Machine that is transformed from the Build Phone.

Rider Gashat

File:Kamen Rider Build Gashat.png

Rider Gashat

Kamen Rider Build (仮面ライダービルドガシャット, Kamen Raidā Birudo Gashatto): Though it was used by Kamen Riders Brave, Snipe, Lazer Turbo and Genm for a yet to be known purpose in Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders, there does not seem to be any indication of a Legend Rider form associated with this Gashat.

Relationships

• Allies
  • nascita
    • Misora Isurugi: When Sento first became Kamen Rider Build, he was introduced to Misora by Soichi, and especially her ability to fertilize Fullbottles. Although they usually bicker and prank each other, Sento cares about her greatly and consoled her who felt guilty about being the cause of the current war. It was due to her response that Sento realized that to end this war, he had to get his own hands dity by fighting as Build, not as a weapon of warfare, but to uphold a sense of justice and protect his friends and his home. Sento is also aware of the importance of Misora's online identity as Mii-tan, and withheld this fact from Kazumi Sawatari when he asked. For the proxy duel, Sento entrusted an empty Fullbottle to Misora that would have the capabilities of stopping Build in his Hazard Form, if he would go out of control. It would not only destroy the Hazard Trigger, but it would also kill Sento as well, Misora had disagreed with this method and simply refused to use it. Luckily when Ryuga appeared and was able to successfully knock Sento out of Hazard Form, Misora cries in joy and didn't use the kill switch. Throughout the war, Misora continues to show her care for Sento as she noticed he hasn't been smiling much, and promised him to fight for "love and peace."
    • Ryuga Banjou/Kamen Rider Cross-Z (Charge): Sento refers to Ryuga as his "best match" for helping him search for his memories and Night Rogue, as he's the only surviving victim from the experiments who retained his memory and escaped before entirely becoming a Smash. They are shown to constantly banter, however they both have great trust and innate respect for each other. When Soichi revealed his true plans, Ryuga got angry and attacked Blood Stalk for Sento and Misora's sake. Later on when Sento was feeling depressed after learning of his own true identity, it was Ryuga who encouraged him to accept for what he was and fight as Build again. Sento was initially unaware of how much he has done for Ryuga and despite not expecting anything back, Ryuga still wished to do the same for him. In turn, Sento accepted the consequences of using the Hazard Trigger for Ryuga's sake as well, although he lost his will to fight after he killed someone in his time of berserk, even surrendering his bottles to the Touto government and turning down the offer to participate in the proxy duel. Ryuga was struck with a sense of guilt, blaming himself for forcing Sento to resort to the dangerous Hazard Trigger, and decides to apologize to the Hokuto Three Crows for Sento. During the proxy duel, Sawa informs Ryuga that Sento was going to die after using the Hazard Trigger. Just before Hazard Build was going to kill Kazumi, Cross-Z Charge interfered and was able to successfully knock Sento out of his Hazard Form upon giving him the pep talk. Ryuga was given the credit for saving him, but at the end he said the credit belonged to everyone.
    • Sawa Takigawa: Sawa was saved by Build before he unknowingly and accidentally revealed his identity and led her to his base. In exchange for her silence, she asks that Sento gives her an interview on the Kamen Rider. Sento agreed on the condition she not only kept his identity secret, but also aid him in solving the mystery of the Smash and his missing memories. Eventually, Sento finds Sawa a bit annoying, as she comments wildly when he is trying to battle. After turned into Smash by Night Rogue and saved by Ryuga as Cross-Z, Sento and Ryuga are shocked as Sawa tells them that she's actually a Faust Spy. In the end, she is forgiven after explaining her reasoning. Sawa is shown to have upheld her dignity and sought Soichi's past files on Sento's request, and continues to support them. When Sento went out of control during the proxy duel with Grease, she realized the only person who could save Sento was Ryuga himself.
    • Kazumi Sawatari/Kamen Rider Grease: Although Kazumi was Sento's enemy during the war, Sento showed sympathy for him since Kazumi was also a war victim. Sento withheld Misora's identity as the online idol Mii-tan from Kazumi. After Sento is struck with grief upon killing Aoba, he begs Kazumi to hit him. However he refuses saying that Aoba's death wasn't his fault and that this is a normal result of war. However because Aoba was a good friend of Kazumi, he swears to defeat him in the proxy battle, should Sento participate. After the duel ended in Grease's defeat, Sento was still under the influence of the Hazard Trigger, and while Ryuga tried to stop him, Kazumi warned Ryuga that it was dangerous. But, after Ryuga succeeded in doing so, Kazumi admit defeat fairly. After Seito made it's invasion into Hokuto, Kazumi and Akaba returned home to save Kiba and their farm, with Sento and Ryuga saying they can't risk joining them due to alliance differences, but they'd wait at the Sky Road. After Kiba's death at hand of Washio Brothers and both Kazumi and Akaba return injured, Sento and Ryuga promise to help them avenge Kiba. Later when Sento is paying his respects to Aoba and Kiba, it was apparent that Kazumi no longer held hard feelings for Sento, and suggested that they team up against Seito. When Build used the Hazard Trigger against Rogue, Grease said he'll knock him out himself if he goes berserk.
• Enemies:
  • Gentoku Himuro/Night Rogue/Kamen Rider Rogue: Sento trusts Gentoku as a more senior employee. Sento views Night Rogue as a rival, with this hatred is fueled further by how he was responsible for the former's experimentation and loss of his past memories. However when Soichi revealed Gentoku's true identity as Night Rogue, Sento confronts Gentoku and they fight for the Pandora Box. It was Gentoku who revealed Sento's true identity to him, information he received from Soichi. Later, during the war between Touto and Hokuto, Sento and Banjou are forced to work with Gentoku. After Taizan returns as Prime Minister, Sento soundly defeats Gentoku, but he returns as a Kamen Rider Rogue who allied with Seito and takes down both Build and Cross-Z without even breaking a sweat. He reveals that the ambitions that he fights for are several times stronger than both Build and Cross-Z combined, and that they'd never understand the pain he went through to get where he was right now. Taking their battle to the outskirts of the Skywall, Rogue defeats Hazard Build with ease.
  • Soichi Isurugi/Blood Stalk: Sento was taken in by Soichi during their first encounter, as Soichi believed that Sento had the potential to become Build. Stalk views Build as equal to Night Rogue, but takes his words and assistance into account. He believes that science will one day bring the end of mankind, but Sento disagreed. Before being aware that Soichi was Stalk, Sento's relationship with the shop owner was on very good terms. However upon realizing the two were one and the same, Sento didn't want to believe that the Soichi he knew was dead. However Sento lost all reason to forgive Soichi after hearing the latter's story, and vowed to defeat him to upload that sense of justice Soichi had previously taught Sento to believe in, in honor of the old Soichi. Despite this, Soichi continues to call Sento to check up on both him and Ryuga. Later, Soichi gives Sento the Hazard Trigger and Fullbottles from Hokuto and Seito, along with their Pandora Panels. Despite all of this, Sento was greatly angered for having his pacifist views shattered. Ultimately, Stalk reprimands him to fight for Touto, for the sake of peoples he cares.
• Past Riders:
  • Emu Hojo/Kamen Rider Ex-Aid: It's not known why Sento planned to attack Emu and take his essence. However, later it was shown that the Build who took Ex-Aid essence was none other than his alter ego, Takumi Katsuragi.
  • Kuroto Dan/Kamen Rider Genm: Apparently, Sento attacks him for taking the essence. However, he declares that he was not Ex-Aid, due in fact that Genm was black, while Ex-Aid was originally pink. Once again, it was his alter ego who attacked Genm.
  • Parado/Kamen Rider Para-DX: To be added.
• Others:
  • Tatsuya Kishida: Before Taro had disappeared, Tatsuya revealed that he and Taro were childhood friends and bandmates. They were so close that they called each other "bros." Initially it was believed that Sento was in fact Taro, and despite "having no memory of being Taro", Sento protected Tatsuya as per his duties as Build.
  • Taro Satou: Although Sento has never met Taro, he has heard of him from Taro's friend Tatsuya. When Sento was Takumi, Takumi called Taro in for a drug test, but this was all prevented by Blood Stalk. Stalk then used the murdered Taro's appearance to change Takumi into Sento.
  • Takumi Katsuragi: Sento's relationship with Takumi is a complicated one, since they're both in fact one-and-the-same. Sento has heard of the name on numerous occasions, and is in possession of the Project Build files Takumi left behind. Sento has heard of horrible things about Takumi, and was both distraught and depressed to learn he was Takumi himself. However after some encouragement from Ryuga, Sento is able to mentally separate himself from Takumi and be just Sento Kiryu, and only Sento Kiryu. Although, he still didn't want to militarize the Rider System, as he is still partly at fault in the war between Touto and Hokuto.
  • Taizan Himuro: Taizan is in good terms with Sento, having entrusted him that he'll win in the proxy duel with Grease.

Behind the Scenes

Portrayal

Sento Kiryu is portrayed by Atsuhiro Inukai (犬飼 貴丈, Inukai Atsuhiro). As Kamen Rider Build, his suit actor is Seiji Takaiwa (高岩 成ニ, Takaiwa Seiji) and Yuya Nawata (縄田 雄哉, Nawata Yuya) in his televised debut in the 44th episode of Kamen Rider Ex-Aid.

Rider No.

As the leading rider protagonist of Kamen Rider Build, Build is labelled Kamen Rider #34 (仮面ライダー34号, Kamen Raidā Sanjūyongō) and Heisei Rider #19 (平成ライダー19号, Heisei Raidā Jūkyūgō).

Etymology

According to Soichi Isurugi, the kanji used to spell Sento's first name, Sento (戦兎, Sento), is composed of the first kanji for tank (戦車, Sensha) and the kanji for rabbit (兎, To); this is referring to Build's primary form, RabbitTank. The last name was provided by the name of the barber Soichi had been headed out to by the time he "found" Sento.

Notes

• Sento as a Rider makes a variety of callbacks to previous Riders in an attempt by Toei to bring the franchise back to its roots:
  • Build's design uses more basic Kamen Rider design cues than many of his recent predecessors, such as large compound eyes, antenna-like features, and his unique motifs being less prominent in his main form.
  • Build's functionality and design is extremely similar to Kamen Rider Double, the Rider who kicked off the second phase of the Heisei Era, using two trinkets in his black and red Driver to interchange halves of his Forms. Other similarities include form names that combine the names of the trinkets in use, and being the first Rider since Double to not have a unique term for his Forms.
  • Build RabbitTank's color scheme is reversibly similar to Para-DX Perfect Knockout Gamer Level 99, which uses blue and red color connection.
  • Sento's imprisonment and experimentation on by Faust is a reference to the Shocker experimentation origins of the Showa Era Riders.
  • Sento's Ninjya Fullbottle creates a half form that gives him a scarf, making him the first main protagonist Rider since Double to have that classic design element.
  • His Driver is also similar to that of Kamen Rider OOO, as there is a set number of collectible items required for a form, certain combinations match to create powerful forms, and said forms have special jingles, while mismatched forms only state the names of the collectibles.
• Sento is the current Rider to hold the record of:
  • the largest count of main forms, with 39 Best Matches (40 if counting DoctorGame Form).
  • the largest count of all forms, with over 1607 forms (1552 Trial Forms, 40 Best Matches, 10 Legend Rider forms, 5 power-up forms, currently), overwhelming 133 forms (334 if Random Combos of special Core Medals are counted) of Eiji Hino.
    • Thanks to Ganbarizing, all 1552 Trial Forms get a real appearance.
    • But, if also including concept forms, such as Random Combos of the CSM-exclusive Core Medals, this record is still holding by Eiji Hino and his A.R. world counterparts, with a total count of 4557.
• According to director Ryuta Tasaki, Build has the "highest IQ of all the Heisei Riders" as Build is a prodigy in physics.
  • Given the statement of being the smartest of just the Heisei Riders, he is seemingly only rivaled in intellect by Kamen Rider 1, who has an IQ of 600 and a major in biochemistry.
• Sento is the first Rider Creator in the Heisei period to be the protagonist since Takeshi Hongo of the Showa era.
• Sento is the first Kamen Rider with the most unique living creature and object theme's.
  • Organic: Rabbit, Hedgehog, Panda, Pirate, Wolf, Rose, Whale, and Giraffe.
  • Inorganic: Tank, Gun, Comic Books, Fire Engine, Vacuum, Lock, Light Bulbs, Cellphone, Helicopter, TV, U.F.O, Jet, Fan, and Gold.
• Sento is the third amnesiac protagonist with a mysterious past, after Shouichi Tsugami of Agito and Tsukasa Kadoya of Decade.
  • He shares many similarities with Tsukasa, like being amnesiac , being a former member of the evil organization, can transform into past Kamen Riders and having an X-designed on his suit.
  • By comparison towards Shouichi Tsugami/Agito, Sento's true identity being that of Takumi Katsuragi brings to mind Shouichi's real name being Tetsuya Sawaki, while there is also an actual Shouichi Tsugami who ironically took his real name.
• Build is the first Kamen Rider since Agito to have certain parts of his body possess different amounts of power (save Ex-Aid's Robot Gamer left arm attachment).
• The pneumatic tubes and assembly platform will not appear when Sento doesn't use a Best Match form.
  • One of the pneumatic tubes will go invisible if a part of the Best Match is already in use during the change into a Best Match from a Trial Form.
• Sento is the first main Heisei Era Rider that has a different color for each eye in all his forms.
• HawkGatling Form is similar to Snipe's Combat Shooting Gamer Level 3, as both of them are orange-colored flying forms armed with gatling guns.
• Coincidentally, Build's PhoenixRobo Form shares an identical motif with Houou Soldier's mecha, Gigant Houou, from Build's first Super Hero Time partner, Uchu Sentai Kyuranger.
• Build's Legend Rider forms work similar to Decade's main ability, with both Riders being able to transform directly into their predecessor Riders.
  • Incidentally, Build is also able to transform into Decade as well.
• A Ganbarizing exclusive finisher for KaizokuRessya bears similarities to Den-O Liner Form's Densha Giri.
• Build is the second Rider after Agito to have more than one super form.
• Build's RabbitTank Sparkling form is similar to Haruto Soma's Dragon Style form's and Takeru Tenkuji's Toucon Boost Damashii as they are evolved versions of the main forms that the Rider's use.
  • RabbitTank Sparkling is an evolved version of Build's RabbitTank form.
  • Wizard's Flame Dragon, Water Dragon, Hurricane Dragon, and Land Dragon are each evolved versions of his Flame Style, Water Style, Hurricane Style, and Land Style respectively.
  • Ghost's Toucon Boost Damashii is an evolved version of his Ore Damashii form.
• Build's Hazard Forms are similar to Kamen Rider Kuuga's Ultimate Form, being predominantly black upgrades which are heavily retooled from the base form, while carrying the risk of the user losing his sense of self and being consumed with a desire to destroy everything.
  • Coincidentally, upgrading with the Full Full RabbitTank Bottle is similar to how Rising Mighty was connected to Amazing Mighty.
  • It is also similiar to Gaim's Jimber Arms, in which it is predominantly black with the frames being identical, but with a few minor design changes in each variant.
• Build's Genius Form takes inspiration from Kamen Rider Eternal, having Fullbottles stick out from almost every part of his body.
  • Given that it's potentially a Final Form, it can be seen as a reference to Kiwami Arms, considering it's seen as a merge of multiple form-changing mechanics.

Appearances

• Kamen Rider Build
  • Episode 1: That One with the Best Match
  • Episode 2: The Innocent Runaway
  • Transformation Lessons ~The Laws Of Transformation Are Set!~ "Kamen Rider Build Chapter"
  • Episode 3: Borderline of Justice
  • Episode 4: The Testimony Will Be Zero
  • Episode 5: Dangerous Identity
  • Episode 6: Moonsault of Anger
  • Episode 7: The Devil's Scientist
  • Episode 8: Memory Starts To Talk
  • Episode 9: The Trap of Project Build
  • Episode 10: Technology of Destruction
  • Episode 11: Burning Dragon
  • Episode 12: Theory of Conspiracy
  • Episode 13: Who Takes Off The Veil?
  • Episode 14: The False Kamen Rider
  • File:Icon-exaid.png Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders
  • Episode 15: Judging Sento Kiryu!
  • Episode 16: The Weaponry Hero
  • Episode 17: Rider Wars Start
  • Episode 18: The Golden Soldier
  • Episode 19: The Forbidden Item
  • Episode 20: The Devil's Trigger
  • Episode 21: The Unstoppable Hazard
  • Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~
    • First Chapter
    • Next Chapter
  • Episode 22: Victory of Tears
  • Episode 23: The Phantom of the West
  • Episode 24: A Man Called Rogue

References

RabbitDragon the Movie