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Icon-buildThis article is about a Rider in Kamen Rider Build.

"Now, shall we begin the experiment? (さぁ、実験を始めようか。, Saa, jikken o hajimeyou ka)"
―Sento's catchphrase before transforming[src]

"Buildビルド Upアップ!"
―Build's call whenever he changes forms[src]

"The law of victory is set! (勝利の法則は決まった!, Shōri no hōsoku wa kimatta!)"
―Build's catchphrase when he has an advantage or before he performs a finisher[src]

"This is the best!/worst. (最高だ!/最悪だ。, Saikō da!/Saiaku da)"
―Sento's catchphrase whenever things go right / wrong[src]

"I'm amazing! I'm the best! I'm a genius!"
―Sento praising his own work[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]

"Humans aren't that simple! Even if we make mistakes...we do research to make sure that the same thing doesn't happen again. That's the duty of science! I believe in humanity!"
―Sento's stand to protect the Earth from Evolto.[src]

"Now, shall we begin the final experiment? (さあ、最後の実験を始めようか。, Saa, saigo no jikken wo hajimeyou ka)"
―Sento's catchphrase before transforming into Cross-ZBuild[src]

Sento Kiryu (桐生 戦兎, Kiryū Sento) is the main protagonist of Kamen Rider Build. He is a physicist who transforms into Kamen Rider Build (仮面ライダービルド, Kamen Raidā Birudo) to uncover the truth behind his mysterious past.

History[]

Background[]

Main article: Takumi Katsuragi
The Devil's Scientist

Takumi Katsuragi performing his "inhumane" experiments as a scientist of Faust

Takumi Katsuragi was the infamous "Devil's Scientist" researcher at the Touto Institute of Advanced Matter Physics, who alongside his father Shinobu Katsuragi was involved in the creation of Project Build, which was completed after Takumi had joined Faust. However despite Faust's objectives, Katsuragi reiterated that Project Build's primary purpose was to combat the alien Evolto, whom he discovered was masquerading on Earth as Soichi Isurugi. Confronting the alien, Katsuragi's plan was foiled and his appearance was switched with the musician Taro Satou. Erasing his memories as well, Evolto smuggled Katsuragi out of Faust and made it appear as if "Sento Kiryu" was just an amnesiac man found in an alleyway nearby Nascita on a rainy day.

Sento is given the Build Driver

Soichi gives Sento the Build Driver

Sento was later given the Build Driver and a set of Fullbottles by Isurugi. During his 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 belt. Upon transforming, Build defeated the Smash and headed back to Nascita, where Soichi and Misora Isurugi awaited for him. From that day on, Sento would continue being Kamen Rider Build in order to uncover the mysteries surrounding his past.

The Faust Conspiracy[]

Sento helped Ryuga escape

Sento believing in Banjo's innocence, helped him escape.

After gaining one year of notoriety as Build, Sento continued searching for clues relating his missing memories and landed a position at the Touto Institute. He would come across the escaped convict Ryuga Banjo, discovering a connection with their experiences of being experimented on. Understanding Banjo's claims that he was framed for Takumi Katsuragi's murder, he is approched meets the journalist Sawa Takigawa who wishes to interview Sento for his activites as Build. Sento and Banjo would come across the mysterious Night Rogue, who is one of the ringleaders of Faust.

Through Sawa's investigations, Sento and Banjo searched for Masahiro Nabeshima, a man with a connection to Takumi Katsuragi's murder and Banjo's jailbreak, but reached a dead end after Nabeshima's memories were temporarily erased. Sento would learn of a musician named Taro Satou, a man who is seemingly identical to Sento. Upon further research on Katsuragi, Sento would uncover the plans to Project Build and would be informed that the Devil's Scientist is alive according to Blood Stalk. With the battle with Faust was heightening, Sento arranges Banjo to become Kamen Rider Cross-Z. After disovering Sawa was originally a spy from Namba Heabvy Industries, Sento experienced turmoil between the three regions' plans to reclaim the Pandora Box, especially after the death Nariaki Utsumi.

Kamen Rider Heisei Generations Final: Build & Ex-Aid with Legend Riders[]

After having dreaming of himself robbing Kamen Rider Ex-Aid of his powers, Sento wakes up receiving the Doctor and Game Fullbottles purified by Misora. Kamen Rider Build later fights the Nebula Bugster attacking a power plant. He utilizes the new bottles to change into an form resembling Ex-Aid to land a hit against the grunts. However, Left Kaiser appears to take away the new bottles and as Cross-Z chases after him, he is transported into another world where the Sky Wall never existed.

Sento is later intercepted by Parado where learns he comes from another world and spent two years tracking Build down to retrieve Ex-Aid's powers back. Soichi Isurugi would appears to drop information on Left Kaiser's identity, Kaisei Mogami, before leaving behind the Phoenix and Robot Fullbottles. Upon further investigation, Sento learns Mogami was a researcher studying parallel worlds and the Bugster Virus. He also learned that Takumi Katsuragi worked very close to him and operated in Ex-Aid's world as Build, having taken Ex-Aid's powers to stop Mogami's nefarious agenda.

Sento would remain in contact with Emu Hojo and Ryuga Banjo from Ex-Aid's world, while he and Parado confront Mogami, learning his intention of smashing the two Earths with his counterpart, Right Kaiser. As the two Earths approached, Sento and Parado landed in Ex-Aid's world and he reunites with Banjo. Sento finally meets Emu and returns the Doctor and Game Bottles to restore his powers. Build and Ex-Aid joined with OOO, Fourze, Gaim, and Ghost as they cycled against the Foundation X Guardians, until the two reached the Interlocking Enigma to confront Bikaiser. Build RabbitTank Sparkling fights with Ex-Aid Muteki Gamer to vanquish Bikaiser together. After Build and Cross-Z say their goodbyes to the Kamen Riders, they return back to their native Earth.

Igniting the Japanese Civil War[]

Katsuragi Sento

Sento upon discovering that he was previously Takumi Katsuragi.

"This is the worst. Having you criticize me... I remember now. I...am a narcissistic-ego driven... hero of justice!"
― Sento regaining his confidence as a Kamen Rider.[src]

One night, Sento was informed by Nabeshima that Soichi Isurugi is Blood Stalk. While confronting Isurugi, Sento uses the power of the Pandora Box to become Build RabbitTank Sparkling. He would also be informed of Gentoku Himuro's true identity as Night Rogue. Although the interim Touto Prime Minister had just issued a warrant for both his and Banjo's arrest, Sento manages to defeat and expose his identity. However, Sento would be told by Gentoku that he is actually Takumi Katsuragi the entire time. After learning of how he really lost his memories, Sento became overridden with guilt due to Katsuragi's past actions, but ultimately managed to find the confidence to resolved to right Katsuragi's wrongs by protecting his country as the hero, Kamen Rider Build.

With Faust's dissolution in Touto, the starving nation of Hokuto declared war on Touto by sending an army of forces to secure the Pandora Box. Sento and Banjo voluntarily assisted Touto's govenment to protect the nation, but are forced to comply with Gentoku Himuro's orders. Build and Cross-Z would encounter Kamen Rider Grease, Kazumi Sawatari, and the Hokuto Sanbagarasu who are Hokuto's forces intent to take the Fullbottles. Furthermore, Banjo would take the Slash Driver that Sento created to become Kamen Rider Cross-Z Charge.

Build 20

Sento deciding to use the Hazard Trigger for the first time

"I will stop you. Even if I lose myself!"
―Sento's before transforming to RabbitTank Hazard Form for the first time[src]
Depressed Sento

Sento, losing his will to fight

While Sento continue to fight off Hokuto's forces, he would learn that his Hazard Level is quite lower than expected. Blood Stalk would grant him the Hazard Trigger, a forbidden item created by Katsuragi that could risk losing sight in himself. Regardless, Sento ended up transforming with the Hazard Trigger, that sent Build into a mindless rage and in the process, taking Aoba's life. Once Sento realizes what he just did, he became too traumatized to continue fighting anymore. Despite this, he is invited as Touto's representive in the upcoming Proxy Battle between him and Grease. On the day of the duel, Build is forced to use the Hazard Trigger once more to defeat Grease. While he does go berserk, Banjo manages to stop him on time and Touto is declared the winner of the war with Hokuto.

Despite this victory, Seito had launched an invasion to Hokuto as its forces are led by the Washio brothers. Sento and Banjo joined forces with Kazumi Sawatari as Seito unveils Kamen Rider Rogue, revealed to be the previously exiled Gentoku Himuro. He becomes wary of Misora as the entity within her, Vernage, was slowly emerging. Sento had also suspected Sawa is still working as Namba's personal spy upon learning her true nature as a Namba Child. In his search to control the Hazard Trigger, Sento sucessfully created the FullFull RabbitTank. As he planned to unveil his latest upgrade at the Proxy Battle between Touto and Seito, he formulated a plan with Sawa to ensure Touto's victory.

During the day of the Proxy Battle, Build is paired with Rogue in the final match. When Rogue questioned his own motives of creating weapons of destruction, Sento confessed that he will accept responsibility for his actions. Using the FullFull RabbitTank Bottle, Sento transforms into Build RabbitRabbit, granting extra armor into the Hazard Form. Although he was able outwit Rogue, Seito had received data of form from Sawa, which allowed Rogue to counter back. However, Sawa was secretly colluding with Sento, giving the signal to transform into Build TankTank and defeat Rogue as he reaffirms in fighting for "love and peace". With Sento's victory, the war with Seito had seemingly come to a close.

The Evolto Revolution[]

Although the war between Touto and Seito had come to a close, Blood Stalk decided to press on by raising the Pandora Tower from the Sky Wall. While the Kamen Riders march on against Seito's forces, they would be informed of Blood Stalk's true nature as Evolto, the alien responsible for the destruction of Mars. Noticing the strange circumstances with Banjo's past, Sento has Sawa look into his background, while creating the Magma Knuckle for him. As the Kamen Riders engage Seito's forces in the Pandora Tower, they manage to get through thanks to Rogue's unexpected assistance and Banjo's transformation into Cross-Z Magma. After returning the Pandora Box back to Touto, Sento learns from Sawa about Banjo's extraterrestrial origins and Shinobu Katsuragi's involvement in it.

After Rogue abducted Prime Minister Himuro, Evolto demands Sento for the Evol-Driver in exchange for the Touto Prime Minister's life. Finding the belt in his lab, the team head to the trade which goes south as Evolto wouldn't cooperate. While Sento disabled Gentoku's chip in exchange for his assistance, Evolto recovers the Evol-Driver and emerges as Kamen Rider Evol, killing Taizen Himuro in the process. Sento is later poisoned by Evol and will die within three days if he doesn't recieve the antidote. While Banjo managed to defeat Evol in order to cure Sento from his condition, Evolto takes this opportunity to possess Banjo and can access Evol's Dragon-based Phase 2 form.

Sento engineers one of the Pandora Box's panels to develop his final power-up item, despite the life-threatening risks. In battle, Build attempts to sacrifice himself to destroy Evolto, but it backfires and Evolto manages to take over Sento's body, ejecting Banjo. With Sento now in Evolto's possession, Evolto accesses Evol's Rabbit-based Phase 3 form, but is still unable to activate his Evol-Trigger, believing humans aren't strong enough to handle the such power. Although Evolto's seperation with Banjo rendered him unable to transform, his determination allowed him to reignite his genes and become Great Cross-Z. However, Evolto managed to complete the Evol-Trigger and access his Black Hole form, jettisoning Sento. However, his memories of being Sento are gone and is reverted back into Takumi Katsuragi.

Build39

Sento Kiryu's triumphant return and holding the Genius Fullbottle.

Katsuragi continued to assist the Riders in their efforts against Evolto. Although he behaved just like Sento, Katsuragi lacked the fundamental aspects of a hero, which prevented him from using the Genius Fullbottle that he finished from Sento's handiwork. Hearing of Sento's seemingly heroic deeds from Banjo, Katsuragi experienced a flow of memories coming into his mind. Sento appears in front of Katsuragi, who asks him if he believed in the power of trust and friendship, to which Sento responds with a smile. With Sento showing Katsuragi the future he could build, they both join hands and assimilated with each other. During the battle against Kamen Rider MadRogue, Sento revealed himself to Banjo having regained his memories. Declaring the return of the egotistic superhero, he reveals the Genius Bottle and successfully activates it into his Build Driver, thus giving birth to Kamen Rider Build Genius Form and overwhelming MadRogue with intense speed and power.

The Tomorrow Build Will Create[]

With his memories been restored back to normal, Sento begins to wonder why Evolto was collecting Fullbottles despite having already reached Black Hole form. He continues to speak with Katsuragi in their shared mental scape, the latter confirming Evolto is searching for Faust's Lost Bottles, which was created by their father Shinobu. While Sento continues to investigate his father's involvement with Evolto, he discovers that his father is still alive, having faked his death. Though Sento believed that Shinobu created Project Build with the intent of combating against Evolto, it did not seem that way as Shinobu was working alongside Evolto to complete the Black Pandora Panels using the Lost Bottles.

While the Kamen Riders continue fighting Evolto and Seito's forces, they are intercepted by another Kamen Rider Build, who is revealed to be Shinobu Katsuragi. Shinobu reveals his intent to collect the Lost Bottles and fights the heroes, turning Misora into the CD Lost Smash. Ultimately by working together, Sento and Banjo defeat Shinobu, with Vernage giving some of her powers to Banjo which also stops his episodes entirely. Upon reclaiming the Rabbit Fullbottle, he has evolved into Hazard Level 7. With the final Lost Bottle in hand, Sento leads the Kamen Riders into defeating Evolto for good. However, Shinobu arrives and places all of Evolto's essence and gear into a large container and reveals his true intentions to foil Evolto's plans. Although Sento hesitates to forgive his father, Evolto escapes and kills Shinobu before the man confides in his son information about a secret White Pandora panel.

Kamen Rider Build: Be The One[]

After intercepting stray Smash attacking a pair of siblings, Sento is suddenly chased down by a mob of civilians compelled to attack him. It is revealed Japan's new governors were actually Blood Tribe members and part of the same race as Evolto. They had operated in the shadows and declared Build an enemy of the country, commencing the "Build Annihilation Plan". Sento quickly lost all of his supporters as Sawa and Misora fell into mind control, Gentoku and Kazumi were overwhelmed by the horde, and Banjo was personally brainwashed by Kengo Ino. Finding himself attacked by Banjo, Sento was robbed of the Hazard Trigger, which was used by Kengo Ino to transform into Kamen Rider Blood.

Sento was fortunately rescued by Evolto, but remained intent in saving Banjo. Sento soon confronted the Blood Tribe and the possessed Banjo in the station square. Using the Genius Bottle, Build was able to land a blow which separated Banjo from Kamen Rider Blood, later curing Banjo from his brainwashing. Knowing that a pair of Hazard Level 7 Fullbottles could defeat Blood, Misora channeled Vernage's power to combine the Gold Rabbit and Silver Dragon Fullbottles, as well as the Genius Bottle, to allow Sento and Banjo to fuse into Kamen Rider Build Cross-ZBuild Form. Ultimately, this new power allowed them to vanquish Kamen Rider Blood and free his compulsion over the Japanese populace.

Sometime after Sento created the White Pandora Panel, it suddenly created a portal that pulled him in. Now on a mountain top, Sento discovers the past Heisei Kamen Riders fighting a platoon of enemies. Suddenly a Time Mazine lands in front of Sento. Kamen Rider Zi-O steps out, who later transforms using Build's powers to defeat the monsters down below.

Final Battle Against Evolto[]

Chikai no BE THE ONE

Build with the other Kamen Riders as they storm Pandora Tower.

While Sento is distressed over his father's death, Evolto evolves into a horrifying new monster form and announcing his intention to destroy Earth. Sento uses the Hazard Trigger with the Genius Bottle to purify a few Lost Bottles and restore Evolto back to Black Hole. Using his father's research, Sento figures out a way to merge their world with one where the Sky Wall did not exist, using Evolto himself as the catalyst. On Kazumi's request, Sento creates the Blizzard Knuckle for him, warning Kazumi that transforming with it would be fatal. Shortly after Evolto's national television broadcast, the Kamen Riders raced up to Pandora Tower. Kazumi and Gentoku stay behind to fight Evolto's replicants, while rest of the team awaited for Evolto at the top, later learning of Kazumi's death from becoming Grease Blizzard. Unable to grieve, Evolto arrives and Sento lashes out at the tyrant.

"To be surrounded by a bunch of idiots... this is the best!"
―Sento expresses his relief of being surrounded by idiots before transforming into Kamen Rider Build Genius Form.[src]

The three remaining Riders transform and charge at Evolto, who was unimpressed at their performance and takes an opportunity to transform back into his monster form. Sento and Banjo watch as Gentoku sacrifices himself to immobilize Evolto, allowing Sento to trap Evolto and tether the worlds. However at the last second, Evolto grabs Banjo and drags him into the ripple between the two Earths. Sento gives pursuit and faces off against Evolto one last time, who mocks his efforts for being a fake hero. Sento retorts that he's been fighting with love and peace, and ultimately accesses RabbitDragon form to vanquish Evolto once and for all. The energy begins the fusion, and both Sento and Banjo are sent flying by a tornado. The two worlds merge, finally bringing peace.

New World[]

New World for Sento

Sento upon arriving in the New World

Sento wakes up in the middle of a park where the Sky Wall originally stood, holding onto a strange stopwatch with an image of Cross-Z on it. While wrapping his head around the situation, he realized his plan to create a new world had succeeded. Takumi, realizing that he was no longer needed, bids farewell to Sento and disappears from his mental psyche. Though the world was finally at peace, no one will know who he was or remember his good deeds. However, Sento is able to happily reunites with the old world Banjo after an encounter with his new world counterpart.

As the duo departed, they begin chronicling their journey into a 49 episode script and moved into a storage facility having finished the recordings. While Sento tasks Banjo to sell his various inventions to make income, Killbus emerges from the White Pandora Panel and takes the Build Driver. While he tries to war Banjo about the new threat, Killbus manages to reactivate the Pandora Box. Those who were experimented on Nebula Gas were able to recall their previous world memories, allowing Sawa, Misora, Kazumi, and Gentoku to resurface in Build's support.

After Banjo regroups with the others, Sento learned Evolto had revived. When Banjo delivers the Dragon Evolbottle, Sento processes the Banjo needs a new power-up item to amplify Evolto's genes to defeat Killbus. This carries the risk of reviving Evolto at full power along with destroying Banjo's body, a necessary risk that Banjo was willing to take. The power-up item was later completed as the excited Sento christened the Muscle Galaxy Fullbottle. He then entrusts Yui Mabuchi to deliver it to Banjo to finish the fight. After Killbus' defeat and Evolto subsequently leaving the planet, Sento continued to work on his latest inventions. It was later revealed he used the Genius Bottle to cure Yui's hospitalized students.

Sento Kiryu Grease

Sento in NEW WORLD: Kamen Rider Grease.

While Sento helps Nariaki Utsumi raise his Hazard Level with a Nebula Gas chamber, he and Banjo are ambushed by Down Fall's Phantom Crusher. While Build and Cross-Z engage the Phantom Crusher, he negates their transformation and takes both the Hazard Trigger and White Panel. After regrouping with Kazumi, Sento questions how he could maintain his transformation and learns Grease and the Hokuto Sanbagarasu had bathed in a hot spring containing Phantom Liquid. Sento reunites with Takumi Katsuragi to study the Phantom Liquid's effects. He devises a new power-up item to harnesses the Phantom Liquid's power specifically made for Kazumi.

After the Hokuto Sanbagarasu were injured during a battle against Metal Build, Sento presented Kazumi with the Perfect Kingdom adapter but advised him that it lacks enough Phantom Liquid to complete it. Despite his suggestion the rest could be extracted from the Hokuto Sanbagarasu, it could put their lives at risk which Kazumi refused. However, the three offered to sacrifice themselves to complete the adapter. Once Sento retrieves Utsumi out from the Nebula Gas capsule, he created a replica Evol-Driver for him to use in the awaiting battle. He assumes Kamen Rider Build Genius Form to defeat the remaining Phantom Crushers. After the battle, Kazumi discovered the Hokuto Sanbagarasu were alive the entire time and Sento deliberately lied about their fate to raise Kazumi's Hazard Level.

Other Events[]

The following events currently do not have an established place within the main continuity.

Kamen Rider Heisei Generations Forever[]

Team Build in Heisei Generations Forever

A powerful Time Jacker named Tid appears and creates two powerful warriors, Another Double and Another Den-O and orders them to pursue a young boy named Shingo. Build and Cross-Z are drawn to Ataru's world to protect Shingo from the Another Riders, while assisted by Grease and Rogue despite them suddenly losing their memories. Together with Sougo Tokiwa, they both discover that Kamen Riders were TV show characters and are not real. Regardless, Sento chooses to continue fighting Tid's forces to protect the people. Build would join the Heisei Kamen Riders for a last battle together and Shingo is returned to his time.

Saber + Zenkaiger: Superhero Senki[]

Though he was seemingly erased as a result of Asmodeus’ manipulations, he was restored back into existence once Touma Kamiyama had helped Shotaro regained his passion in drawing out the superheroes that he wants to draw out.

During the climatic final battle itself, he can be seen fighting alongside Kamen Rider Stronger, DenziRed, Red1 and Kamen Rider Espada.

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]

Originally a man with no memories of his past, one of the greatest traits Sento has kept from the transition from Takumi is his genius-level intellect, which he has displayed numerous times with his advanced knowledge of science, mathematics, engineering, and cryptography. Sento is easily attracted to anything he deems mysterious or interesting, such as a new innovation or a lead towards uncovering his past, and will relentlessly pursue it. This will continue until either he reaches a conclusion or someone forcibly stops him during progress. When Sento gets excited (usually due to a discovery or breakthrough), he receives an ahoge, a single lock of hair that typically represents a person with a foolish and carefree personality, traits that are not entirely absent in Sento.

Another trait that is carried over from Takumi is his polymathism, which is accompanied by an inflated ego and sharp tongue: he likes to praise himself for his works, and often mocks Banjo for his comparatively lower intelligence. 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.

Perhaps Sento's greatest and most well-known trait is his "superhero like" sense of justice, which Sento is said to have uniquely created all on his own, separate from Takumi's natural anti-heroic nature. 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:

  • Pre-transformation: "Now, shall we begin the experiment?" (さあ、実験を始めようか?, Sā, jikken o hajimeyou ka?).
    • Variant in Kamen Rider Build: Be The One: "Now, shall we begin the final experiment?" (さあ、最後の実験を始めようか?, Sa, saigo no jikken o hajimeyou ka).
  • Post-transformation: "The laws of victory are set." (勝利の法則は決まった, Shōri no hōsoku wa kimatta).

Powers and Abilities[]

Powers[]

  • Artificially Enhanced Physiology: Sento underwent an experiment from Faust which injected him with a certain amount of Nebula Gas, which has enhanced his physical condition to a certain degree. To be noted that as his Hazard Level increases, his physical condition increases as well. Since his body was presumably been experimented on beforehand, as Takumi Katsuragi was able to become Build in previous occasions, he didn't mutate into a Smash and 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 was at 4.4 according to Blood Stalk, last time it was measured. By using a panel from the Pandora Box in the Build Driver, Sento was able to raise his Hazard Level to 6, a feat that should not be possible for a human being. Soon, he raised his Hazard level to 6.3+ by cranking the Build Driver's Vortex Lever. During his fight with the CD Lost Smash and Shinobu Katsuragi as another Build, Sento raised his Hazard level to 7.
  • Fullbottle Augmentation: By shaking a Fullbottle in his hand, regardless of whether he is transformed or not, Sento can gain abilities based on said Fullbottle's traits.
    • Rabbit: Allows Sento to gain fast reflexes. First used to defeat Ryuga Banjo in a one-on-one fight.
    • Gold Rabbit: Allows Sento to perform powerful punches. First used to defeat Shinobu Katsuragi's version of Build.
    • Gorilla: Allows Sento to perform fiery punches. First used to fight Ryuga Banjo.
  • Fourth-Wall Interaction: Used only for comical purposes, Sento is capable of interacting with Banjo's recollection of his birth in various ways. This normally involves said recollection being thrown away or knocked off-screen somehow.
  • Hazard Level Measurement: Sento gained this ability following his acquisition of Genius Form. He was able to detect Evolto's rising Hazard Level while fighting him.

Abilities[]

  • Genius-Level Intellect: Sento's most defining trait is his intelligence. He is a genius in several fields of science and has an advanced knowledge of particularly both physics and chemistry. Thus, he created majority of Build's accessories and modified from Evol-Driver and Evol-Trigger to create Build Driver and Hazard Trigger that they would be safe to use by humans, all of Cross-Z's equipment on his own, some equipment and Fullbottles for Grease and Rogue. Since regaining his memories of Takumi Katsuragi, his intellect has combined with the latter as well, enabling him to complete Project Build.
    • Out-of-universe, director Ryuta Tasaki himself has noted Sento to have the "highest IQ of all the Heisei Riders".
  • Master Scientist: A exceptional scientific prodigy, Sento is a ingeniously resourceful, knowledgeable, and brilliant scientist who is well-educated in many different fields of science, including physics, chemistry, and advanced mathematics. This is publicly proven through his perfect test score on a difficult physics test administered by the Touto Institute of Advanced Matter Physics. This proves a significant asset in battle, which Sento incorporates into his fighting technique with his science knowledge. He cultivated and activated inert Evolto Cells despite Evolto being a completely alien life form. Moreover, he masters the usage of in his technology a Gas that warps Physics and Space-Time (The Sky Wall notably had Bugster Viruses in them which is not found in Build's Universe but rather Ex-Aid's).
  • Master Engineer: Sento is an extremely talented and prolific engineer and technician, having been able to make many complicated inventions. Since inheriting Project Build, Sento has showcased an immense and prolific talent in engineering by developing the majority, if not all, of the equipment used by himself and the rest of Team Build. He is also a master craftsman. Hence, he created fake versions of his gear to use as bait, which were completely indistinguishable from the genuine article with the naked eye. He has also made a modified microwave machine in Nascita's basement, and through Vernage's power inside of Misora Isurugi's bracelet to purified the harmful properties in Smash Bottle, leading to the creation of a Fullbottle which can then be used by Build.
  • Time Travel Knowledge: Sento also seems to understand the fundamentals of time travel as well, as he is able to maintain the bootstrap paradox previously established by Sougo, in fact that he is currently the only legacy Rider in Zi-O to remember Sougo giving him the blank Ridewatch and return it, knowing Sougo is a time traveler. In Heisei Generations Forever, he was able to repair a time machine without prior knowledge on how it works, though it most likely stems from his previous encounter with Sougo before the latter had even met him in the first place.
  • Expert Tactician: Sento has shown himself to be a capable strategist, being able to outwit Blood Stalk on two occasions as well as Namba.
  • Skilled Combatant: Being the creator of Build's Rider system, Sento has become adept at physical combat, even knowing how to use the Fullbottles' abilities to his advantage when fighting out-of-suit. Sento's fighting capabilities have been demonstrated ever since he was still Katsuragi, even though he had to take a while to adapt to combat again during his first post-amnesiac fight as Build.
  • Bilingualism: Sento speaks his native Japanese and can possibly speak English as he able to read files written in English entirely and perfectly translate it back to Japanese verbally.

Weaknesses[]

  • Form Data: As seen on Utsumi's tablet, Namba has data on most (if not all) of Build's forms, including tactical data for countering them. Hypothetically, Sento would be at a disadvantage if his opponents are powerful enough to utilize said counters.

Former Weaknesses[]

  • 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 Banjo'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. Sento uses the Dragon Bottle in the finale for his RabbitDragon form when he is finally above Hazard Level 7, giving him a complete control.
    • Dragon Jelly: Sento is also incapable of using this item as well when he uses Banjou's Sclash Driver.
  • Hazard Kill Switch: With Utsumi's help, Sento designed a switch that would allow the user to overload and destroy the Hazard Trigger, killing Sento in the process, should he ever lose control while using it. However, Sento has came up with an idea on countering the side effects of the Hazard Trigger by using the broken fragments of the Low Rabbit Fullbottle as a basis, thus the creation of the FullFull RabbitTank Bottle.
  • Alien Poison: Due to Evolto's poison injecting on him, Sento will suffer panic attacks and a high health risk, right until Evolto removes it from his body after a few hours while possessing Banjo. This goes the same for Killbus, however, Sento manages to cure himself with the Genius Fullbottle.

Forms[]

Kamen Rider Build 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.

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).

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.

RabbitTank is the Best Match form for this bottle. To see all possible form combinations, see Rabbit Halfbody and Tank Halfbody.

RabbitTank Form
KRBu-Buildrabbittank

RabbitTank Form

"Rabbit! Tank! Best Match! Are you ready? (Techno rock music) Hagane no moonsault! RabbitTank! Yeah!"
―RabbitTank's transformation announcement[src]
Rider Statistics
  • Rider Height: 196 cm.
  • Rider Weight: 99 kg.
Ability Parameters
  • Punching Power: 9.9 t. (right arm)/17 t. (left arm)
  • Kicking Power: 23.7 t. (right leg)/17.8 t. (left leg)
  • Maximum Jump Height: 55 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 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 a Touto Best Match, and is themed after a rabbit and a tank.

Being Build's most balanced (and second fastest) form, RabbitTank is the Best Match form favored by Sento, despite being able to transform with any Fullbottles. The Rabbit and Tank Fullbottles are noted as having a particularly high synergy with each other and compatibility with various mechanisms, thus RabbitTank is the basis of several upgraded forms Build can access.

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 surface.

This form's weapon is the Drill Crusher. In the final episode, Build uses the Fullbottle Buster while in this form.

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 Mode: Build channels the energy of a Fullbottle in his Drill Crusher and performs a powerful slash.
        • Biotic:
          • 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.
        • Abiotic:
          • Rocket: The Drill Crusher charges at the enemy and attacks like a rocket.
      • Gun Mode: 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.
  • Fullbottle Buster finisher:
    • Just Match Break (ジャストマッチブレイク, Jasuto Matchi Bureiku): Build channels the power of two Fullbottles for a powerful attack.
      • Buster Blade Mode
        • Gold Rabbit + Silver Dragon: Build jumps into the air and performs a powerful downward slash covered in gold and silver energy, followed by two horizontal slashes.
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! KumaTV!! VS Kamen Rider Grease!, Build 21-25, 30, Be The One, Build 49, Kamen Rider Build: Final Stage, Heisei Generations Forever, Zi-O Episodes 39, 41, Kamen Rider Zi-O: Over Quartzer, Kamen Rider: Reiwa The First Generation, Kamen Rider Saber + Kikai Sentai Zenkaiger: Superhero SenkiIcon-crosswiki

RabbitSoujiki Form
KRBu-Buildrabbitsoujiki

RabbitSoujiki Form

"Rabbit! Soujiki! Are you ready? (Funky music)"
―RabbitSoujiki's transformation announcement[src]
Rider Statistics
  • Rider Height: 196 cm.
  • Rider Weight: 93.7 kg.
Ability Parameters
  • Punching Power: 7.9 t. (right arm)/5.7 t. (left arm)
  • Kicking Power: 9.6 t. (right leg)/14.2 t. (left leg)
  • Maximum Jump Height: 38.4 m.
  • Maximum Running Speed: 100 m. 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 Parameters 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).

This form is exclusive to Kamen Rider Build Episode 2.

RabbitGatling Form
KRBu-Buildrabbitgatling

RabbitGatling Form

"Rabbit! Gatling! Are you ready? (Funky music)"
―RabbitGatling's transformation announcement[src]
Rider Statistics
  • Rider Height: 196 cm.
  • Rider Weight: 95 kg.
Ability Parameters
  • Punching Power: 7.9 t. (right arm)/8 t. (left arm)
  • Kicking Power: 10.8 t. (right leg)/14.2 t. (left leg)
  • Maximum Jump Height: 37.7 m.
  • Maximum Running Speed: 100 m. 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).

This form is exclusive to Kamen Rider Build Episode 4.

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.

GorillaMond is the Best Match form for this bottle. To see all possible form combinations, see Gorilla Halfbody and Diamond Halfbody.

GorillaMond Form
KRBu-Buildgorillamond

GorillaMond Form

"Gorilla! Diamond! Best Match! Are you ready? (Tropical rock music) Kagayaki no destroyer! GorillaMond! Yeah!"
―GorillaMond's transformation announcement[src]
Rider Statistics
  • Rider Height: 189 cm.
  • Rider Weight: 112 kg.
Ability Parameters
  • Punching Power: 25.9 t. (right arm)/15.8 t. (left arm)
  • Kicking Power: 17.3 t. (right leg)/16.5 t. (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 a Touto Best Match, and 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 abiotic 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 to create a gust full of diamonds and uses the Muscle Glove to punch them at the enemy. The diamonds creates a tornado that causes a human to separate from his/her Smash form, then Build punches the Smash inside the tornado, destroying it.
  • Build stops an enemy's projectile attack in mid-air with the BLD Prism Glove, altering the projectile's 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

GorillaSoujiki Form
KRBu-Buildgorillasoujiki

GorillaSoujiki Form

"Gorilla! Soujiki! Are you ready? (Funky music)"
―GorillaSoujiki's transformation announcement[src]
Rider Statistics
  • Rider Height: 189 cm.
  • Rider Weight: 111.7 kg.
Ability Parameters
  • Punching Power: 20.7 t. (right arm)/5.7 t. (left arm)
  • Kicking Power: 9.6 t. (right leg)/13.2 t. (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).

This form is exclusive to Kamen Rider Build Episode 3.

GorillaRocket Form
KRBu-Buildgorillarocket

GorillaRocket Form

"Gorilla! Rocket! Are you ready? (Funky music)"
―GorillaRocket's transformation announcement[src]
Rider Statistics
  • Rider Height: 189 cm.
  • Rider Weight: 115 kg.
Ability Parameters
  • Punching Power: 20.7 t. (right arm)/11.6 t. (left arm)
  • Kicking Power: 13.5 t. (right leg)/13.2 t. (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).

This form is exclusive to Kamen Rider Build Episode 8

In any form that uses the Taka Fullbottle, Build is armed with the Celestial Wings (ソレスタルウィング, Soresutaru Wingu) on his back that grant him the ability to fly, along with the Hawk Gatlinger. [3]

HawkGatling is the Best Match form for this bottle. To see all possible form combinations, see Taka Halfbody and Gatling Halfbody.

HawkGatling Form
KRBu-Buildhawkgatling

HawkGatling Form

Kamen Rider Build HawkGatling Form (Extended Wings)

Extended wings

"Taka! Gatling! Best Match! Are you ready? (Brass band music) Tenkuu no abarenbou! HawkGatling! Yeah!"
―HawkGatling's transformation announcement[src]
Rider Statistics
  • Rider Height: 193 cm.
  • Rider Weight: 107 kg.
Ability Parameters
  • Punching Power: 9.7 t. (right arm)/10 t. (left arm)
  • Kicking Power: 13.5 t. (right leg)/14.2 t. (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 a Touto Best Match, and 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 Celestial 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, Be The One, 49 (flashback; archive footage only), Kamen Rider Build: Final Stage

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.

NinninComic is the Best Match form for this bottle. To see all possible form combinations, see Ninjya Halfbody and Comic Halfbody.

NinninComic Form
KRBu-Buildninnincomic

NinninComic Form

"Ninjya! Comic! Best Match! Are you ready? (Surfer rock music) Shinobi no entertainer! NinninComic! Yeah!"
―NinninComic's transformation announcement[src]
Rider Statistics
  • Rider Height: 194 cm.
  • Rider Weight: 90.5 kg.
Ability Parameters
  • 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: 100 m. 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 a Touto Best Match, and 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.

Additionally, thanks to the stretchable Onmitsu Scarf, Build can wrap his entire body in it to camoflauge himself with local scenery, rendering him almost invisible.

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! KumaTV!! VS Kamen Rider Grease!, Build 20, Kamen Rider Build: Final Stage

NinjyaTank Form
KRBu-Buildninjyatank

NinjyaTank Form

"Ninjya! Tank! Are you ready? (Funky music)"
―NinjyaTank's transformation announcement[src]
Rider Statistics
  • Rider Height: 194 cm.
  • Rider Weight: 101.1 kg.
Ability Parameters
  • Punching Power: 8.9 t. (right arm)/13.6 t. (left arm)
  • Kicking Power: 19 t. (right leg)/17.8 t. (left leg)
  • Maximum Jump Height: 32.3 m.
  • Maximum Running Speed: 100 m. 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).

This form is exclusive to Kamen Rider Build Episode 6

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.

RocketPanda is the Best Match form for this bottle. To see all possible form combinations, see Panda Halfbody and Rocket Halfbody.

RocketPanda Form
KRBu-Buildrocketpanda

RocketPanda Form

"Panda! Rocket! Best Match! Are you ready? (Orchestra music) Buttobi monotone! RocketPanda! Yeah!"
―RocketPanda's transformation announcement[src]
Rider Statistics
  • Rider Height: 189 cm.
  • Rider Weight: 114 kg.
Ability Parameters
  • 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: 100 m. 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 a Touto Best Match, and 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
KRBu-Buildpandagatling

PandaGatling Form

"Panda! Gatling! Are you ready? (Funky music)"
―PandaGatling's transformation announcement[src]
Rider Statistics
  • Rider Height: 189 cm.
  • Rider Weight: 112 kg.
Ability Parameters
  • Punching Power: 15 t. (right arm)/8 t. (left arm)
  • Kicking Power: 10.8 t. (right leg)/12.3 t. (left leg)
  • Maximum Jump Height: 26.6 m.
  • Maximum Running Speed: 100 m. 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).

This form is exclusive to Kamen Rider Build Episode 7

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.

FireHedgehog is the Best Match form for this bottle. To see all possible form combinations, see Harinezumi Halfbody and Syoubousya Halfbody.

FireHedgehog Form
KRBu-Buildfirehedgehog

FireHedgehog Form

"Harinezumi! Syoubousya! Best Match! Are you ready? (Rock music with sirens) Rescue kenzan! FireHedgehog! Yeah!"
―FireHedgehog's transformation announcement[src]
Rider Statistics
  • Rider Height: 190 cm.
  • Rider Weight: 103.7 kg.
Ability Parameters
  • Punching Power: 13.7 t. (right arm)/11.9 t. (left arm)
  • Kicking Power: 14.7 t. (right leg)/14 t. (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 Syoubousya Fullbottles, hence known as the Rescue Kenzan (レスキュー剣山, Resukyū Kenzan). It is a Touto Best Match, and 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
KRBu-Buildharinezumitank

HarinezumiTank Form

"Harinezumi! Tank! Are you ready? (Funky music)"
―HarinezumiTank's transformation announcement[src]
Rider Statistics
  • Rider Height: 194 cm.
  • Rider Weight: 102.7 kg.
Ability Parameters
  • Punching Power: 11 t. (right arm)/13.6 t. (left arm)
  • Kicking Power: 19 t. (right leg)/11.2 t. (left leg)
  • Maximum Jump Height: 28.4 m.
  • Maximum Running Speed: 100 m. per 7 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 Parameters 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

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.

LionCleaner is the Best Match form for this bottle. To see all possible form combinations, see Lion Halfbody and Soujiki Halfbody.

LionCleaner Form
KRBu-Buildlioncleaner

LionCleaner Form

"Lion! Soujiki! Best Match! Are you ready? (Techno rock music) Tategami cyclone! LionCleaner! Yeah!"
―LionCleaner's transformation announcement[src]
Rider Statistics
  • Rider Height: 189 cm.
  • Rider Weight: 104.3 kg.
Ability Parameters
  • Punching Power: 17.4 t. (right arm)/7.1 t. (left arm)
  • Kicking Power: 12 t. (right leg)/21.3 t. (left leg)
  • Maximum Jump Height: 39 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 a Touto Best Match, and 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 parameters. 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
KRBu-Buildlioncomic

LionComic Form

"Lion! Comic! Are you ready? (Funky music)"
―LionComic's transformation announcement[src]
Rider Statistics
  • Rider Height: 194 cm.
  • Rider Weight: 99 kg.
Ability Parameters
  • Punching Power: 13.9 t. (right arm)/7 t. (left arm)
  • Kicking Power: 8.1 t. (right leg)/17 t. (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)

This form is exclusive to Kamen Rider Build Episode 15

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.

KeyDragon is the Best Match form for this bottle. To see all possible form combinations, see Dragon Halfbody and Lock Halfbody.

KeyDragon Form
KRBu-Buildkeydragon

KeyDragon Form

"Dragon! Lock! Best Match! Are you ready? (Fantasy-themed music) Fūin no fantasy star! KeyDragon! Yeah!"
―KeyDragon's transformation announcement[src]
Rider Statistics
  • Rider Height: 196 cm.
  • Rider Weight: 108 kg.
Ability Parameters
  • Punching Power: 19.7 t. (right arm)/16.9 t. (left arm)
  • Kicking Power: 17.6 t. (right leg)/24.1 t. (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 a Touto Best Match, and 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. Sento originally could not handle the form, which caused electrocution, intense pain, and later forced de-transformation. After Sento reached Hazard Level 7, he was able to use the form at ease.

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

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

KaizokuRessya is the Best Match form for this bottle. To see all possible form combinations, see Kaizoku Halfbody and Densya Halfbody.

KaizokuRessya Form
KRBu-Buildkaizokuressya

KaizokuRessya Form

"Kaizoku! Densya! Best Match! Are you ready? (Pirate-themed string music) Teikoku no hangyakusha! KaizokuRessya! Yeah!"
―KaizokuRessya's transformation announcement[src]
Rider Statistics
  • Rider Height: 189 cm.
  • Rider Weight: 95.8 kg.
Ability Parameters
  • Punching Power: 12 t. (right arm)/12.7 t. (left arm)
  • Kicking Power: 15 t. (right leg)/13.8 t. (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)[4] 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 a Touto Best Match, and 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, and the Multi Sail Mantle (マルチセイルマント, Maruchi Seiru Manto) on his right shoulder for increased agility and throwing net-like capturing maneuver.

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 lit. Departure).

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 Mode: 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 azure energy slash.
  • Kaizoku Hassyar finisher:
    • Kaizoku Densya (海賊電車): After charging the Kaizoku Hassyar by pulling back the Build Arrow and holding it until it reaches the final tier, 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. While performing this finisher, the Kaizoku Hassyar announces Hassha (発射 lit. Fire).
Appearances: Build Episodes 12-13, Heisei Generations FINAL: Build & Ex-Aid with Legend Riders, Build 15, 19

KaizokuGatling Form
KRBu-Buildkaizokugatling

KaizokuGatling Form

"Kaizoku! Gatling! Are you ready? (Funky music)"
―KaizokuGatling's transformation announcement[src]
Rider Statistics
  • Rider Height: 189 cm.
  • Rider Weight: 98.1 kg.
Ability Parameters
  • Punching Power: 9.6 t. (right arm)/8 t. (left arm)
  • Kicking Power: 10.8 t. (right leg)/11 t. (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.[5]

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

This form is exclusive to Kamen Rider Build Episode 16

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.

OctopusLight is the Best Match form for this bottle. To see all possible form combinations, see Octopus Halfbody and Light Halfbody.

OctopusLight Form
KRBu-Buildoctopuslight

OctopusLight Form

"Octopus! Light! Best Match! Are you ready? (Electronic music) Inazuma technician! OctopusLight! Yeah!"
―OctopusLight's transformation announcement[src]
Rider Statistics
  • Rider Height: 193.5 cm.
  • Rider Weight: 96.5 kg.
Ability Parameters
  • Punching Power: 4.4 t. (right arm)/4.8 t. (left arm)
  • Kicking Power: 8.6 t. (right leg)/8 t. (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 a Touto Best Match, and is themed after an octopus and a light bulb.

This is Build's weakest Best Match form in terms of ability parameters. 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, BLD 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

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

PhoenixRobo is the Best Match form for this bottle. To see all possible form combinations, see Phoenix Halfbody and Robot Halfbody.

PhoenixRobo Form
KRBu-Buildphoenixrobo

PhoenixRobo Form

"Phoenix! Robot! Best Match! Are you ready? (Dark classical music) Fujimi no heiki! PhoenixRobo! Yeah!"
―PhoenixRobo's transformation announcement[src]
Rider Statistics
  • Rider Height: 191 cm.
  • Rider Weight: 112.3 kg.
Ability Parameters
  • Punching Power: 15.7 t. (right arm)/28.8 t. (left arm)
  • Kicking Power: 23.4 t. (right leg)/16.8 t. (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 a Hokuto Best Match, and 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, Birudo 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 Sanbagarasu 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.

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

PhoenixSoujiki Form
KRBu-Buildphoenixsoujiki

PhoenixSoujiki Form

"Phoenix! Soujiki! Are you ready? (Funky music)"
―PhoenixSoujiki's transformation announcement[src]
Rider Statistics
  • Rider Height: 191 cm.
  • Rider Weight: 98 kg.
Ability Parameters
  • Punching Power: 12.6 t. (right arm)/5.7 t. (left arm)
  • Kicking Power: 9.6 t. (right leg)/13.4 t. (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

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.

SmaphoWolf is the Best Match form for this bottle. To see all possible form combinations, see Wolf Halfbody and Smapho Halfbody.

SmaphoWolf Form
KRBu-Buildsmaphowolf

SmaphoWolf Form

"Wolf! Smapho! Best Match! Are you ready? (Classic rock music) Tsunagaru ippiki ookami! SmaphoWolf! Yeah!"
―SmaphoWolf's transformation announcement[src]
Rider Statistics
  • Rider Height: 189 cm.
  • Rider Weight: 91.6 kg.
Ability Parameters
  • Punching Power: 16.6 t. (right arm)/5.2 t. (left arm)
  • Kicking Power: 10.4 t. (right leg)/20.8 t. (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 a Hokuto Best Match, and 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

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.

RoseCopter is the Best Match form for this bottle. To see all possible form combinations, see Rose Halfbody and Helicopter Halfbody.

RoseCopter Form
KRBu-Buildrosecopter

RoseCopter Form

"Rose! Helicopter! Best Match! Are you ready? (Spanish music) Jounetsu no senpūki! RoseCopter! Yeah!"
―RoseCopter's transformation announcement[src]
Rider Statistics
  • Rider Height: 190 cm.
  • Rider Weight: 94.2 kg.
Ability Parameters
  • Punching Power: 6.3 t. (right arm)/12.9 t. (left arm)
  • Kicking Power: 14.4 t. (right leg)/10.6 t. (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 vermillion 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 a Hokuto Best Match, and 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
KRBu-Buildrosesoujiki

RoseSoujiki Form

"Rose! Soujiki! Are you ready? (Funky music)"
―RoseSoujiki's transformation announcement[src]
Rider Statistics
  • Rider Height: 190 cm.
  • Rider Weight: 93.2 kg.
Ability Parameters
  • Punching Power: 5 t. (right arm)/5.7 t. (left arm)
  • Kicking Power: 9.6 t. (right leg)/8.5 t. (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 vermillion 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).

This form is exclusive to Kamen Rider Build Episode 21

RoseSyoubousya Form
KRBu-Buildrosesyoubousya

RoseSyoubousya Form

"Rose! Syoubousya! Are you ready? (Funky music)"
―RoseSyoubousya's transformation announcement[src]
Rider Statistics
  • Rider Height: 190 cm.
  • Rider Weight: 99.5 kg.
Ability Parameters
  • Punching Power: 5 t. (right arm)/9.5 t. (left arm)
  • Kicking Power: 11.8 t. (right leg)/8.5 t. (left leg)
  • Maximum Jump Height: 30.1 m.
  • Maximum Running Speed: 100 m. per 5 sec.

RoseSyoubousya Form (ローズ消防車フォーム, Rōzu Shōbōsha Fōmu) is Build's vermillion and scarlet Trial Form accessed through the Rose and Syoubousya 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).

This form is exclusive to Kamen Rider Build Episode 25

In any form that uses the Tora Fullbottle, Build is armed with the BLD Tora Fight Glove (BLDトラファイトグローブ, BLD Tora Faito Gurōbu) on his right hand for slashing attacks, and the Jungle Foot Shoes (ジャングルフットシューズ, Janguru Futto Shūzu) for leaping at the enemy at blurring speeds for a split second.[6]

ToraUFO is the Best Match form for this bottle. To see all possible form combinations, see Tora Halfbody and UFO Halfbody.

ToraUFO Form
KRBu-Buildtoraufo

ToraUFO Form

"Tora! UFO! Best Match! Are you ready? (Jungle music) Mikakunin jungle hunter! ToraUFO! Yeah!"
―ToraUFO's transformation announcement[src]
Rider Statistics
  • Rider Height: 189 cm.
  • Rider Weight: 100.5 kg.
Ability Parameters
  • Punching Power: 17.8 t. (right arm)/5.1 t. (left arm)
  • Kicking Power: 8.7 t. (right leg)/21.2 t. (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 a Seito Best Match, and is themed after a tiger and a UFO.

In this form, This form grants Build a balanced boost in all his ability parameters akin to LionCleaner. He is also armed with the Inbay Dodge Shoes (インベイダッジシューズ, Inbei Dajji Shūzu) that 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): Build generates a pink, energy UFO that rams into any enemy before sucking them up and shredding them to pieces.

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

In any form that uses the Kujira Fullbottle, Build is armed with the Navy Chest Armor (ネイビーチェストアーマー, Neibī Chesuto Āmā) for protection against water pressure, and the BLD Spout Glove (BLDスパウトグローブ, BLD Supauto Gurōbu) on his right hand for a water-based shooting attack.

KujiraJet is the Best Match form for this bottle. To see all possible form combinations, see Kujira Halfbody and Jet Halfbody.

KujiraJet Form
KRBu-Buildkujirajet

KujiraJet Form

"Kujira! Jet! Best Match! Are you ready? (Tropical music) Amakakeru big wave! KujiraJet! Yeah!"
―KujiraJet's transformation announcement[src]
Rider Statistics
  • Rider Height: 189.5 cm.[7]
  • Rider Weight: 116.5 kg.[7]
Ability Parameters
  • Punching Power: 18.0 t. (right arm)/13.5 t. (left arm)[7]
  • Kicking Power: 23.0 t. (right leg)/25.5 t. (left leg)[7]
  • Maximum Jump Height: 46.2 m.[7]
  • Maximum Running Speed: 100 m. per 6.9 sec.[7]

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

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 floods the area in front of him and goes underwater, then a giant whale comes up and boosts Build with its blowhole allowing Build to fly out of the water, and perform a powerful kick at the enemy.
  • Drill Crusher finisher:
    • Vortex Break (ボルテックブレイク, Borutekku Bureiku):
      • Gun Mode: Build channels the energy of a Fullbottle in his Drill Crusher and performs a powerful blast.
        • Sensuikan: Build shoots some torpedoes at the enemy.
Appearances: Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~: Next Chapter, Build Episode 22

KujiraSyoubousya Form
KRBu-Buildkujirasyoubousya

KujiraSyoubousya Form

"Kujira! Syoubousya! Are you ready? (Funky music)"
―KujiraSyoubousya's transformation announcement[src]
Rider Statistics
  • Rider Height: 189.5 cm.
  • Rider Weight: 120 kg.
Ability Parameters
  • Punching Power: 14.4 t. (right arm)/9.5 t. (left arm)
  • Kicking Power: 11.8 t. (right leg)/20.4 t. (left leg)
  • Maximum Jump Height: 28.8 m.
  • Maximum Running Speed: 100 m. per 7 sec.

KujiraSyoubousya Form (クジラ消防車フォーム, Kujira Shōbōsha Fōmu) is Build's navy and scarlet-colored Trial Form accessed from the Kujira and Syoubousya Fullbottles. It is themed after a whale and a fire engine.

This form is exclusive to Kamen Rider Build Episode 25

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

KirinCyclone is the Best Match form for this bottle. To see all possible form combinations, see Kirin Halfbody and Senpuki Halfbody.

KirinCyclone Form
KRBu-Buildkirincyclone

KirinCyclone Form

"Kirin! Senpuki! Best Match! Are you ready? (Techno rock music) Arashi o yobu kyotō! KirinCyclone! Yeah!"
―KirinCyclone's transformation announcement[src]
Rider Statistics
  • Rider Height: 190.0 cm.[7]
  • Rider Weight: 109 kg.[7]
Ability Parameters
  • Punching Power: 20.1 t. (right arm)/5.3 t. (left arm)[7]
  • Kicking Power: 8.8 t. (right leg)/23.2 t. (left leg)[7]
  • Maximum Jump Height: 39 m.[7]
  • Maximum Running Speed: 100 m. per 5.6 sec.[7]

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 Towering Storm-Caller (嵐を叫ぶ巨塔, Arashi o Yobu Kyotō). It is a Seito Best Match 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 flies to the enemy with his fan arm, then summons an energy giraffe neck and attacks the enemy with it.

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

RabbitTank Sparkling Form
KRBu-Buildrabbittanksparkling

RabbitTank Sparkling Form

"RabbitTank Sparkling! Are you ready? (Techno rock music) Shuwatto hajikeru! RabbitTank Sparkling! Yea-Yeah!"
―RabbitTank Sparkling's transformation announcement[src]
Rider Statistics
  • Rider Height: 202 cm.
  • Rider Weight: 102.1 kg.
Ability Parameters
  • Punching Power: 14.9 t. (right arm)/25.5 t. (left arm)
  • Kicking Power: 35.6 t. (right leg)/26.7 t. (left leg)
  • Maximum Jump Height: 66 m.
  • Maximum Running Speed: 100 m. per 2 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. It is known as the Bubbling and Bursting (シュワッと弾ける, Shuwatto Hajikeru).

RabbitTank Sparkling, in comparison to RabbitTank, is a vast of improvement. It can run faster than KaizokuRessya, jump higher than RabbitTank, and has superior punching and kicking power parameters, with the right leg boasting more power then any of Build's previously introduced forms.

In addition, RabbitTank Sparkling's gains the red R Sparkling Blade (Rスパークリングブレード, R Supākuringu Burēdo) and the blue T Sparkling Blade (Tスパークリングブレード, T Supākuringu Burēdo) on its right and left arm respectively, allowing Build to utilise close quarter slashing attacks.

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

When initiating a finisher, the Carbonic Chest Armor (カルボニックチェストアーマー, Karubonikku Chesuto Āmā) generates multiple Dimension Bubbles[8] (ディメンションバブル, Dimenshon Baburu), which can distort local space, that cover Build's attacking limb.

This form has three 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 energy chart for a blackhole/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 Densya (海賊電車 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 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 can perform a powerful, bubbly finisher.
      • Blade Mode: 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, Raising the Hazard Level ~7 Best Matches~: Final Chapter, Build 27, 49, Kamen Rider Saber + Kikai Sentai Zenkaiger: Superhero SenkiIcon-crosswiki

By attaching the Hazard Trigger to the Build Driver, Build can upgrade any of his Best Match forms into a Super Best Match (スーパベストマッチ, Supā Besuto Matchi). 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 power boost, capable of making its user destroy even a Hazard Smash with little effort. However if Sento uses the Hazard Trigger for too long within a Super Best Match, it will overstimulate his nervous system and send 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 amount of time he can use the Trigger with his consciousness intact. Sento can overcome the effects of the Hazard Trigger by using it along with the FullFull RabbitTank Bottle. When the Force Ride Meter on the Trigger is struck forcefully with an attack, it will paralyze him for a period of time. This weakness is carried over from the Evol-Trigger, which the Hazard Trigger is based on. By the end of the series, Sento's Hazard Level has become high enough to allow him to use the raw Hazard Form long enough to defeat an opponent before losing control, though ultimately it will eventually overwhelm him.

All of Build's forms accessed with the Hazard Trigger are armed with the HZ Deadly Gloves and HZ Vanish End Shoes.

The finisher of the Super Best Matches is called the Hazard Finish (ハザードフィニッシュ, Hazādo Finisshu).

RabbitTank Hazard Form

KRBu-Buildrabbittankhazard

RabbitTank Hazard Form

KRBu-Buildrabbittankhazard (Two Left Eye Rabbit HZs)

RabbitTank Hazard Form (Two Left Eye Rabbit HZs)

"Rabbit! Tank! Super Best Match! Are you ready? (Techno rock music) Uncontrol switch! Black Hazard! Yabei!"
―Hazard Form transformation announcement[src]
Rider Statistics[9][10]
  • Rider Height: 197.5 cm
  • Rider Weight: 101 kg
Ability Parameters[9][10]
  • Punching Power: 19.8 t (right arm)/34 t (left arm)
  • Kicking Power: 47.4 t (right leg)/35.6 t (left leg)
  • Maximum Jump Height: 77 m
  • Maximum Running Speed: 100 m per 1.4 seconds

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.

RabbitTank Hazard Form consists of the following parts
  • BLD-RT Hazard Head (BLD-RTハザードヘッド, BLD-RT Hazādo Heddo): The helmet.
    • Furious Head Armor (フュリオスヘッドアーマー, Fu~yuriosu Heddo Āmā): The jet black hear armor. Durability is raised thanks to a special strengthening agent, allowing the user to reduce the distance between them and the enemy while resisting their attacks.
    • Dangerous Enhancer (デンジャラスエンハンサー, Denjarasu Enhansā): A strengthening device located on the forehead. It forcibly triggers a struggling instinct via special strengthening agents that it inserts into certain parts of the brain, raising attack power. However, this function puts an excessive load to the user's mental state, and there is a risk of losing one's sense of self during long battles due to continuous use. Additionally, the strengthening agent affects the limbic system, especially the amygdala, which may cause mental changes after combat.
    • BLD Signal HZ (BLDシグナルHZ, BLD Shigunaru HZ): A data collection device located on the Dangerous Enhancer. It not only collects combat data in real time, but also performs emergency repairs on the body when necessary. It also collects data on the enemy, allowing the user to grasp their abilties.
    • Left Eye Rabbit HZ (レフトアイラビットHZ, Refuto Ai Rabitto HZ): The left eyepiece. The eyepiece. Enhances response speed and search accuracy, and a special olfactory sensor is incorporated to locate hidden enemies.
    • Ear Face Module HZ (イヤーフェイスモジュールHZ, Iyā Feisu Mojūru HZ): The ‘rabbit ear’ on the Left Eye Rabbit section. Enhances Build’s sense of hearing and predicts enemy movement by capturing their current movement, allowing for a quick counterattack.
    • Right Eye Tank HZ (ライトアイタンクHZ, Raito Ai Tanku HZ): The right eyepiece. Instantly performs calculations on ballistic trajectories to increase the hit rate of any handheld weapon that Build may be holding.
    • Cannon Face Module HZ (キャノンフェイスモジュールHZ, Kyanon Feisu Mojūru HZ): The ‘tank turret’ on the Right Eye Tank HZ. Through unknown means, it can increase the firepower, range and explosive impact power of any weapon being used.
  • HZ Furious Chest Armor (HZフュリオスチェストアーマー, HZ Fu~yuriosu Chesuto Āmā): The jet black chest armor. Durability is raised thanks to a special strengthening agent, allowing the user to reduce the distance between them and the enemy while resisting their attacks. A black gas capable of harming can be discharged into the surrounding area. The black gas can also expose hidden enemies.
  • HZ Violent Shoulders (HZヴァイオレントショルダー, HZ Vu~aiorento Shorudā): The shoulder armor. When switching to Over Flow Mode or when initiating a special attack, a strengthening agent is inserted into the body, raising the attack power of each body part. It can also fortify the arm and leg armor, making them heavy.
  • HZ Grave Rush Arms (HZグレイヴラッシュアーム, HZ Gureivu Rasshu Āmu): The arms. Their basic attack ability has been raised thanks to a special strengthening agent, making it possible to mercilessly kill an enemy with a single punch. The right arm possesses the characteristics of the Rabbit Fullbottle, while the left arm possesses the characteristics of the Tank Fullbottle.
  • HZ Deadly Gloves (HZデッドリーグローブ, HZ Deddorī Gurōbu): The reinforced hands. It has a function to disassemble and disperse anything that comes into contact with it. When a special move is initiated, enemy armor can be extinguished with a single punch, and energy is inserted into the point of impact for assured destruction. As the timeframe of a battle increases, the user 's urge to destroy increases due to the special strengthening devices, increasing attack power.
  • HZ Unlimited Suit (HZアンリミテッドスーツ, HZ Anrimiteddo Sūtsu): The shock-resistant bodysuit. Along with protecting the wearer’s body, there is a limiter installed that can be released to bring out full physical ability.
  • HZ Grave Rush Legs (HZグレイヴラッシュレッグ, HZ Gureivu Rasshu Reggu): The legs. Their basic attack ability has been raised thanks to a special strengthening agent, making it possible to mercilessly kill an enemy with a single kick. The right leg possesses the characteristics of the Tank Fullbottle, while the left leg possesses the characteristics of the Rabbit Fullbottle.
  • HZ Vanish End Shoes (HZヴァニッシュエンドシューズ, HZ Vu~anisshu Endo Shūzu): The shoes. It has a function to disassemble and disperse anything that comes into contact with it. When a special move is initiated, enemy armor can be extinguished with a single punch, and energy is inserted into the point of impact for assured destruction. As the timeframe of a battle increases, the user 's urge to destroy increases due to the special strengthening devices, increasing attack power.
Finishers
  • Over Flow (オーバーフロー, Ōbāfurō): This finisher has two variations:
    • 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.
    • Build rushes at the enemy at maximum speed
  • Hazard Finish (ハザードフィニッシュ, Hazādo Finisshu): This finisher has two variations:
    • 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 dark purple energy before delivering a powerful side kick.
    • Build rushes towards the enemy and performs a flying kick.
Appearances: Build Episodes 20- 21, Raising the Hazard Level ~7 Best Matches~: Final Chapter, Build 22-26

SmaphoWolf Hazard Form
KRBu-Buildsmaphowolfhazard

SmaphoWolf Hazard Form

"Wolf! Smapho! Super Best Match! Are you ready? (Techno rock music) Uncontrol switch! Black Hazard! Yabei!"
―Hazard Form transformation announcement[src]
Rider Statistics[11]
  • Rider Height: 197.5 cm
  • Rider Weight: 101.0 kg
Ability Parameters[11]
  • Punching Power: 33.2 t (right arm)/10.4 t (left arm)
  • Kicking Power: 20.8 t (right leg)/41.6 t (left leg)
  • Maximum Jump Height: 58.2 m
  • Maximum Running Speed: 100 m per 2.5 seconds

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.

Build Driver finishers
  • Over Flow (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
KRBu-Buildhawkgatlinghazard

HawkGatling Hazard Form

"Taka! Gatling! Super Best Match! Are you ready? (Techno rock music) Uncontrol switch! Black Hazard! Yabei!"
―Hazard Form transformation announcement[src]
Rider Statistics[12][13]
  • Rider Height: 197.5 cm
  • Rider Weight: 101 kg
Ability Parameters[12][13]
  • Punching Power: 19.4 t (right arm)/20.0 t (left arm)
  • Kicking Power: 27 t (right leg)/28.4 t (left leg)
  • Maximum Jump Height: 58.4 m
  • Maximum Running Speed: 100 m per 2.9 seconds

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. Build is armed with the Hawk Gatlinger in this form. He can also summon the Solstall Wings for flight if needed.

Finishers
  • Over Flow (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.
This form is exclusive to Episode 22.

KaizokuRessya Hazard Form
KRBu-Buildkaizokuressyahazard

KaizokuRessya Hazard Form

"Kaizoku! Densya! Super Best Match! Are you ready? (Techno rock music) Uncontrol switch! Black Hazard! Yabei!"
―Hazard Form transformation announcement[src]
Rider Statistics[14][15]
  • Rider Height: 197.5 cm
  • Rider Weight: 101 kg
Ability Parameters
  • Punching Power: 24 t (right arm)/25.4 t (left arm)
  • Kicking Power: 30 t (right leg)/27.6 t (left leg)
  • Maximum Jump Height: 55.2 m
  • Maximum Running Speed: 100 m per 1.3 seconds

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. Build is armed with the Kaizoku Hassyar in this form.

Finishers
  • Over Flow (オーバーフロー, Ōbāfurō): Build repeatedly punches the enemy with his HZ Deadly Gloves delivering purple shockwaves on impact.
  • Hazard Finish (ハザードフィニッシュ, Hazādo Finisshu):
Appearances: Build Episode 24, 35

KeyDragon Hazard Form
KRBu-Buildkeydragonhazard

KeyDragon Hazard Form

"Dragon! Lock! Super Best Match! Are you ready? (Techno rock music) Uncontrol switch! Black Hazard! Yabei!"
―Hazard Form transformation announcement[src]
Rider Statistics[16][17]
  • Rider Height: 197.5 cm
  • Rider Weight: 101 kg
Ability Parameters[16][17]
  • Punching Power: 39.4 t (right arm)/33.8 t (left arm)
  • Kicking Power: 35.2 t (right leg)/48.2 t (left leg)
  • Maximum Jump Height: 66.4 m
  • Maximum Running Speed: 100 m per 2.5 seconds

KeyDragon Hazard Form (キードラゴンハザードフォーム, Kī Doragon Hazādo Fōmu) is Build's turbocharged super form accessed by upgrading KeyDragon Form with the Hazard Trigger. Build is armed with the Beat Closer in this form.

Finishers
  • Over Flow (オーバーフロー, Ōbāfurō): Build repeatedly punches the enemy with his HZ Deadly Gloves delivering purple shockwaves on impact.
  • Hazard Finish (ハザードフィニッシュ, Hazādo Finisshu):
Appearances: Build Episode 35

By using the FullFull RabbitTank Bottle alongside the Hazard Trigger, Build can upgrade the sleek, black Hazard Form into either RabbitRabbit Form or TankTank Form. The FullFull RabbitTank Bottle was designed to give Build an immense power boost over Hazard Form while suppressing the stimulus Over Flow that causes Build to go berserk. Build's weapon in these forms is the Fullbottle Buster.

The ending theme for both RabbitRabbit Form and TankTank Form is entitled "Ready Go!!".

RabbitRabbit Form
KRBu-Buildrabbitrabbit

RabbitRabbit Form

"Rabbit and Rabbit! Build up! Are you ready? Over Flow! (Techno pop music) Kurenai no speedy jumper! RabbitRabbit! Yabei! Haei![18]"
―Transformation announcement[src]
Rider Statistics[19][20]
  • Rider Height: 197.5 cm
  • Rider Weight: 106.2 kg
Ability Parameters[19][20]
  • Punching Power: 39.9 t
  • Kicking Power: 47.8 t
  • Base Jump Height: 88 m
    • Max Jump Height: 132 m
  • Base Running Speed: 100 m per 1.2 seconds
    • Maximum Running Speed: 100 m per 0.8 seconds

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 FullFull 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. Strengthening materials inside the chest piece of RabbitRabbit allow the user to increase its reaction time, jumping height, running speed up to a maximum of 1.5x.

In RabbitRabbit Form, Build is armed with and protected by the Rapid Rabbit Shoulders (BLDラピッドラビットショルダー, BLD Rapiddo Rabitto Shorudā), the Speed Chest Armor (スピーディーチェストアーマー, Supīdī Chesuto Āmā), the arm-mounted Hop Pop Gauntlets (ホップポップガントレット, Hoppu Poppu Gantoretto) and the leg-mounted Jump Champ Leggers (ジャンプチャンプレガース, Janpu Chanpu Regāsu).

The Hop Pop Gauntlets and Jump Champ Leggers contain Dimension Springers (ディメンションスプリンガー, Dimenshon Supuringā) that enable long distance stretching.

On the back of RabbitRabbit Form is the cape-like Mufflerabbit Accelerator (マフラビットアクセラレーター, Mafura Bitto Akuserarētā), which enables Build to run around at supersonic speeds thanks to an inbuilt propulsion accelerating device.

Build Driver finisher
  • RabbitRabbit Finish (ラビットラビットフィニッシュ, Rabitto Rabitto Finisshu): Jumping into the air, Build stretches his leg towards the opponent, and pulling his body towards his foot, connects with the target, with the resulting impact sending his opponent flying.
Fullbottle Buster finishers
  • Fullbottle Break (フルボトルブレイク, Furubotoru Bureiku): Build channels the power of a single Fullbottle for either a powerful slash or a powerful shot.
  • Just Match Break (ジャストマッチブレイク, Jasuto Matchi Bureiku): Build channels the power of two Fullbottles for a powerful attack.
    • Buster Cannon Mode
      • Rabbit + Panda: Build fires a ball of red and white energy mixed together.
      • Rocket + Jet: Build fires a ball of cyan energy.
  • Miracle Match Break (ミラクルマッチブレイク, Mirakuru Matchi Bureiku): Build channels the power of three Fullbottles for a powerful attack.
    • Buster Cannon Mode
      • Rabbit + Panda + Taka: Build fires a ball of red and white energy mixed together that gives off orange energy shockwaves upon impact.
  • Ultimate Match Break (アルティメットマッチブレイク, Arutimetto Macchi Bureiku): Build channels the power of four Fullbottles for a powerful attack.
  • FullFull Match Break (フルフルマッチブレイク, Furu Furu Matchi Bureiku): Build channels the power of the FullFull RabbitTank Bottle for a powerful attack
    • Buster Blade Mode
      • Rabbit Mode: This finisher has two variations:
        • Build runs at the enemy at high speeds, and delivers a slash with the blade covered in red energy.
        • Build performs a 360 degree spinning slash covered in red energy that is capable of hitting multiple enemies.
Appearances: Build Episodes 27-36, 38-40, 45, Be The One, Build 49, Kamen Rider Prime Rogue

TankTank Form

KRBu-Buildtanktank

TankTank Form

KRBu-Buildtanktank (Tank Body)

TankTank Form (Transformed)

"Tank and Tank! Build up! Are you ready? Over Flow! (Techno rock music) Kōtetsu no blue warrior! TankTank! Yabei! Tuei![18]"
―Transformation announcement[src]
Rider Statistics[21][22]
  • Rider Height: 197.5 cm
  • Rider Weight: 145.3 kg
Ability Parameters[21][22]
  • Base Punching Power: 47 t
    • Maximum Punching Power: 70.5 t
  • Base Kicking Power: 53.7 t
    • Maximum Kicking Power: 80.55 t
  • Maximum Jump Height: 58 m
  • Maximum Running Speed: 100 m per 1.1 seconds

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 FullFull 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 Wōriā).

In this form, Build's armor becomes significantly denser and is covered in tank treads and turrets to boost his attacks and defenses. Strengthening materials inside the chest piece of TankTank allow the user to increase its punching and kicking power up to a maximum of 1.5x.

In TankTank Form, Build is armed with and protected by the BLD TankTank Shoulders (BLDタンクタンクショルダー, BLD Tanku Tanku Shorudā), the Warrior Chest Armor (ウォーリアチェストアーマー, Wōriā Chesuto Āmā), the arm-mounted Fight Might Gauntlets (ファイトマイトガントレット, Faito Maito Gantoretto) and the leg-mounted Dash Mash Leggers (ダッシュマッシュレガース, Dasshu Masshu Regāsu).

The Fight Might Gauntlets and Dash Mash Leggers contain Blue Tank Rollers (ブルータンクローラー, Burū Tanku Rōrā), which are the tank tread-like units on the forearms and shins, and enable high-speed cutting power.

Build Driver finisher
  • TankTank Finish (タンクタンクフィニッシュ, Tanku Tanku Finisshu):
Fullbottle Buster finishers
  • Fullbottle Break (フルボトルブレイク, Furubotoru Bureiku): Build channels the power of a single Fullbottle for a powerful attack.
    • Buster Cannon Mode
      • Spider: Build fires a blast of purple energy that transforms into a web to trap the target.
      • Magnet: Build fires a blue energy magnet that pulls enemies towards each other to the point where they implode.
      • Dryer: Build fires a ball of red energy that transforms into a stream of heat which continuously burns the target.
  • Just Match Break (ジャストマッチブレイク, Jasuto Matchi Bureiku): Build channels the power of two Fullbottles for a powerful attack.
  • Miracle Match Break (ミラクルマッチブレイク, Mirakuru Matchi Bureiku): Build channels the power of three Fullbottles for a powerful attack.
  • Ultimate Match Break (アルティメットマッチブレイク, Arutimetto Macchi Bureiku): Build channels the power of four Fullbottles for a powerful attack.
    • Buster Cannon Mode
      • Tank + Jet + Gatling + Rocket: Build fires a ball of blue, gray, and white energy with the images on Bottles mixed together that gives off cyan energy shockwaves upon impact.
  • FullFull Match Break (フルフルマッチブレイク, Furu Furu Matchi Bureiku): Build channels the power of the FullFull RabbitTank Bottle for either a powerful slash or a powerful shot.
    • Buster Cannon Mode
      • Tank Mode: This finisher has two variations:
        • Build's lower body transforms into a pair of tank treads, the cannons on his shoulder armor flips forward, and Build rolls around the battlefield while dealing out multiple continuous shots to its target, ending the barrage with a large blast of energy that gives off blue electricity.
        • Build fires a blue energy ball that creates shockwaves upon impact.
Appearances: Build Episodes 28-33, 35-36, 40, 43-44, Be The One, Build 48-49

Genius Form

KRBu-Buildgenius

Genius Form

KRBu-Buildgeniusoverflow

Genius Form with Hazard Trigger

"Genius! Are you ready? Kanzen muketsu no bottle yarō! Build Genius! Sugei! Monosugei!"
―Transformation announcement[src]

"Genius! Build up! Are you ready? Over Flow! Kanzen Muketsu no Bottle Yarō! Build Genius! Yabei! Sugei! Monosugei!"
―Alternate transformation announcement with Hazard Trigger[src]

Rider Statistics[23][24]
  • Rider Height: 196.4 cm
  • Rider Weight: 105.6 kg
Ability Parameters[23][24]
  • Punching Power: 55.7 t
  • Kicking Power: 61.1 t
  • Maximum Jump Height: 86.3 m
  • Maximum Running Speed: 100 m per 0.9 seconds

Genius Form (ジーニアスフォーム, Jīniasu Fōmu)[25] is Build's final form, accessed by using the Genius Fullbottle in the Build Driver. It is hence known as the Completely Flawless Bottle Guy (完全無欠のボトル野郎, Kanzen Muketsu no Botoru Yarō).

Genius Form is more balanced compared to RabbitRabbit Form and TankTank form, having a punching and kicking power lower than TankTank's maximum capabilities and a jumping height and running speed lower than RabbitRabbit's maximum capabilities. In this form Build was able to easily defeat Kamen Rider MadRogue. However, he has weaker punching and kicking power than all of Evol's forms and is surpassed by Evol Black Hole Form in all categories.

In this form Build is able to utilize bursts of extreme speed and his reaction time is heightened to the point where enemy attacks appear to him to be moving in slow motion. He is also able to utilize the powers and abilities of any of the 60 main Fullbottles. Build's most powerful asset in this form, however, is the ability neutralize Nebula Gas in its various forms, thanks to the Full Build Reactor (フルビルドリアクター, Furu Birudo Riakutā) located on the chest. He is able to neutralize the Nebula Gas in the cells of his opponents, as he was able to defeat Yoshiko Tajimi as the Owl Lost Smash without the risk of her dying due to overexposure to the gas. This was also seen when his attacks caused Kamen Rider MadRogue to collapse with his armor emitting electric sparks. In this form Build is also able to neutralize the essence of Lost Fullbottles, as when he defeats a Lost Smash, the Lost Fullbottle it used to transform turns completely black. This ability is also seen when Evolto tries to turn Sento into a Lost Smash with the Castle Fullbottle, but to no effect.

Even with the Hazard Trigger attached, Build can still fight without going on a destructive rampage. He also gains the ability to negate the Pandora Panel's effects on Lost Fullbottles. This is shown when Build's Genius Finish attack reverted the Hammer and Castle Lost Fullbottles back to their original state.

Genius Form is covered with 60 GN Fullbottles (GNフルボトル, GN Furubotoru), each one carrying an essence of one Fullbottle. Warm colored GN Fullbottles (red, magenta and orange) carry biotic essences (i.e. Rabbit, Dragon, Rose, etc.) while the cold dored ones carry abiotic essences (i.e. Tank, Lock, Helicopter, etc.). When executing a finisher, the GN Fullbottles will glow while their essences are carried by the Full Build Pipelines (フルビルドパイプライン, Furu Birudo Paipurain) running all over Genuis Form, feeding them into the Full Build Reactor before redistributing it over the body.

Build continues to wield the Fullbottle Buster in this form.

Build loses access to this form after the Genius Fullbottle's energy is absorbed in the process of uniting the black and white Pandora Panels.

Build Driver finishers
  • Genius Attack (ジーニアスアタック, Jīniasu Atakku): Build channels the energy of all 30 biotic Fulbottles, making the red, magenta, and orange parts of his body glow before delivering a punch covered in red energy.
  • Genius Break (ジーニアスブレイク, Jīniasu Bureiku): Build channels the energy of all 30 abiotic Fullbottles, making the blue, cyan, and violet parts of his body glow before delivering a side kick covered in blue energy that creates a shockwave upon impact and sends the enemy flying.
  • Genius Finish (ジーニアスフィニッシュ, Jīniasu Finisshu): This finisher has three variations:
    • Build performs an enhanced version of RabbitTank Form's Vortex Finish, with the graph being rainbow colored and Build emitting rainbow-colored gas in order to accelerate into the enemy.
    • Build performs a side kick covered in red, blue, and gold sparks of energy that creates a swirling, rainbow-colored shockwave upon impact.
    • Build delivers a punch that creates a swirling, rainbow-colored shockwave upon impact.
Fullbottle Buster finishers
  • FullFull Match Break (フルフルマッチブレイク, Furu Furu Matchi Bureiku): Build channels the power of the FullFull RabbitTank Bottle for a powerful attack.
    • Buster Blade Mode: Build unleashes a green energy slash that travels through the air.
    • Buster Cannon Mode: Build fires a rainbow energy ball that creates shockwaves upon impact.

Build Genius Form's ending theme is entitled "Build up", with "Law of the Victory" featuring as the ending theme when Genius Form teams up with Kamen Rider Cross-Z Magma, Kamen Rider Grease, and Kamen Rider Rogue.

Appearances: Build Episodes 39-45, Be The One, Build 46-48

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

Trial Form RabbitDragon
KRBu-Buildrabbitdragon

RabbitDragon Form

"Rabbit! Dragon! Are you ready? (Funky music) Best Match!"
―RabbitDragon's transformation announcement[src]
Rider Statistics[26][27]
  • Rider Height: 196 cm
  • Rider Weight: 93.1 kg
Ability Parameters[26][27]
  • Punching Power: 47.8 t (right arm)/55.8 t (left arm)
  • Kicking Power: 61.3 t (right leg)/54.5 t (left leg)
  • Maximum Jump Height: 79.8 m
  • Maximum Running Speed: 100 m per 1.1 seconds

Trial Form RabbitDragon (トライアルフォーム(ラビットドラゴン), Toraiaru Fōmu Rabitto Doragon), also known as RabbitDragon Form (ラビットドラゴンフォーム, Rabitto Doragon Fōmu), is Build's gold and silver Trial Form accessed through the Gold Rabbit and Silver Dragon Fullbottles, themed after a rabbit and a dragon.

In this form, Build's punching and kicking power is equivalent to Genius Form, while his maximum jumping height and running speed are slightly lower. Overall, RabbitDragon Form is a good alternative to Genius Form, which Sento could not use due to the Genius Fullbottle being drained of its energy after uniting the Black and White Pandora Panels, and was able to destroy Evolto in his Ultimate State.

Although RabbitDragon Form is a Trial Form, the strong feelings between Sento and Ryuga caused the Build Driver to reproduce the Best Match announcement after the transformation was complete.

As a mismatched form, this form's finisher is the Vortex Attack (ボルテックアタック, Borutekku Atakku): Build performs an alternate version of RabbitTank Form's Vortex Finish with gold and silver energy. Build also reverts to RabbitTank Form in the process.

This form is exclusive to Kamen Rider Build Episode 49.

Before this form debuted in the series, it was teased in a trailer for Kamen Rider Build: Be The One before Cross-ZBuild Form was revealed.

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

KumaTV is the Best Match form for this bottle. To see all possible form combinations, see Kuma Halfbody and Televi Halfbody.

KumaTV Form
KRBu-Buildkumatv

KumaTV Form

"Kuma! Televi! Best Match! Are you ready? (Upbeat brass music) Hachimitsu high vision! KumaTV! Yeah!"
―KumaTV's transformation announcement[src]
Rider Statistics[28]
  • Rider Height: 189 cm
  • Rider Weight: 124 kg
Ability Parameters[28]
  • Punching Power: 25.7 t (right arm)/14.7 t (left arm)
  • Kicking Power: 17.9 t (right leg)/16.6 t (left leg)
  • Maximum Jump Height: 30.7 m
  • Maximum Running Speed: 100 m per 6.8 seconds

KumaTV 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 TV Fullbottles, hence known as the Honey High Vision (はちみつハイビジョン, Hachimitsu Hai Bijon). It is a Hokuto Best Match, and 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! KumaTV!! VS Kamen Rider Grease!.

SameBike is the Best Match form for this bottle. To see all possible form combinations, see Same Halfbody and Bike Halfbody.

SameBike Form
KRBu-Buildsamebike

SameBike Form

"Same! Bike! Best Match! Are you ready? (Surfer music) Dokusou hunter! SameBike! Yeah!"
―SameBike's transformation announcement[src]
Rider Statistics[29]
  • Rider Height: 194 cm
  • Rider Weight: 110.5 kg
Ability Parameters[29]
  • Punching Power: 16.7 t (right arm)/16.8 t (left arm)
  • Kicking Power: 22.4 t (right leg)/20.7 t (left leg)
  • Maximum Jump Height: 41.2 m
  • Maximum Running Speed: 100 m per 4.1 seconds

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 a Seito Best Match, and is themed after a shark and the Machine Builder.

In this form, Build has the ability to use echolocation in order to detect invisible foes and can summon several energy projections of the Machine Builder that autonomously attack the enemy.

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 rides the Machine Builder like a surfboard as a projection of a shark launches him and the bike into the enemy.

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

Cross-ZBuild Form
KRBu-Buildcrosszbuild

Cross-ZBuild Form

"Cross-ZBuild! Are you ready? Rabbit! Dragon! Be the one! Cross-ZBuild! Yeahhh! Yeahhh!"
―Cross-ZBuild's transformation announcement[src]
Rider Statistics[30]
  • Rider Height: 197.6 cm
  • Rider Weight: 111.1 kg
Ability Parameters
  • Punching Power: 55 t (right arm)/64.2 t (left arm)
  • Kicking Power: 70.5 t (right leg)/62.7 t (left leg)
  • Maximum Jump Height: 91.8 m
  • Maximum Running Speed: 100 m per 0.8 seconds

Cross-ZBuild Form (クローズビルドフォーム, Kurōzu Birudo Fōmu) is Build's fusion form, combining the powers of Build and Cross-Z and fusing Sento and Ryuga into one body. It is accessed using the Cross-ZBuild Can. In this form, Build's stats exceed those of Genius Form, making it his strongest form. Cross-ZBuild can summon the golden mechanical Best Match Rabbit (ベストマッチラビット, Besuto Matchi Rabitto) and the blue energy Best Match Dragon (ベストマッチドラゴン, Besuto Matchi Doragon) to assist him in combat.

Cross-ZBuild Form is composed of the following parts:

  • BLD Cross-ZBuild Head (BLDクローズビルドヘッド, BLD Kurōzu Birudo Heddo): The helmet.
    • Cross-Z Head Armor (クローズヘッドアーマー, Kurōzu Heddo Āmā): The blue head armor. It has the property of improving durability by optimizing the internal structure and density balance each time it is attacked. Additionally, a balancer is built in to assist Cross-ZBuild's defense movements so that the enemy's attack can be avoided with minimal movement.
    • Build Head Armor (ビルドヘッドアーマー, Birudo Heddo Āmā): The red head armor. High-density and high-strength materials are used, allowing Cross-ZBuild to lightly catch the onslaught of strong enemies. In addition, a strengthening device that utilizes the characteristics of the Gold Rabbit Full Bottle is incorporated, and the movement speed and reaction speed can be doubled.
    • Best Match Signal (ベストマッチシグナル, Besuto Matchi Shigunaru): The tuning device on the forehead. It synchronises the consciousness of the two transformants and supports them so that their behaviour isn't hindered. Additionally, it is possible to aggregate battle data in real time and accurately grasp the abilities of yourself and the enemy. It also manages the condition of the whole body, and if there is a damaged part it will automatically perform emergency repair.
    • CB Right Eye Dragon (CBライトアイドラゴン, CB Raito Ai Doragon): The right eye. It increases Cross-ZBuild's reaction speed and increases their accuracy and avoidance rate in combat. The surface is covered with a clear shield with excellent impact resistance to protect the visual sensor from intense combat.
    • CB Dragon Face Module (CBドラゴンフェイスモジュール, CB Doragon Feisu Mojūru): A heat generation enhancement device installed on the side of the CB Right Eye Dragon. It heats the armor of the whole body to the melting point, increasing the power of the special move by several times. It mainly works when Cross-ZBuild's emotions are excited.
    • CB Left Eye Rabbit (CBレフトアイラビット, CB Refuto Ai Rabitto): The left eye. It increases Cross-ZBuild's reaction speed and accuracy in combat. A special olfactory sensor is incorporated to find enemies hidden in the shadows.
    • CB Ear Face Module (CBイヤーフェイスモジュール, CB Iyā Feisu Mojūru): The 'rabbit ear'. A hearing enhancement device installed on the head of Kamen Rider Build. By catching the signs and slight movements of the enemy, the next action is predicted and a quick counterattack is possible. It can also summon the golden Best Match Rabbit unit to the vicinity to act as support during combat.
  • Build Chest Armor (ビルドチェストアーマー, Birudo Chesuto Āmā): The red chest armor. High-density and high-strength material is used, and weight reduction is also applied to improve athletic performance. Additionally, a strengthening device that utilizes the characteristics of the Gold Rabbit Full Bottle is incorporated, and Cross-ZBuild's movement speed and reaction speed can be doubled.
  • Cross-Z Chest Armor (クローズチェストアーマー, Kurōzu Chesuto Āmā): The blue chest armor and vest section. It has the role of converting the components of the Cross-ZBuild Can loaded in the Build Driver into luminescent enhanced particles, dramatically increasing the attack performance of each part of the whole body. It can also convert the ingredients of the Silver Dragon Full Bottle into the blue flame energy body "Best Match Dragon" and fight together.
  • BLD Unlimited Suit (BLDアンリミテッドスーツ, BLD Anrimiteddo Sūtsu): The shock-resistant bodysuit. Along with protecting the wearer’s body, there is a limiter installed that can be released to bring out full physical ability.
  • CB Rabbit Shoulder (CBラビットショルダー, CB Rabitto Shorudā): The right shoulder. It optimizes the movement of the arm to improve Cross-ZBuild's attack speed and strengthens the power of slashing when using weapons. It is also possible to rotate the Build Driver's Vortex Lever at a speed several tens of times faster than before, greatly increasing the power of the special move.
  • CB Dragon Shoulder (CBドラゴンショルダー, CB Doragon Shorudā): The right shoulder. It optimizes the movement of the arm and increasing the speed and power of the fighting attack to the same level as the enemy.
  • Build Rush Arm (ビルドラッシュアーム, Birudo Rasshu Āmu): The right arm. It's agility and controllability have been enhanced to the utmost limit, and it is possible to continue hitting the enemy with a super-fast jab that does not allow a counterattack using the leg-mounted dimensional telescopic spring "CB Dimension Springer".
  • CB Rabbit Fight Glove (CBラビットファイトグローブ, CB Rabitto Faito Gurōbu): The right hand. It has a function to converge the impact of a punch attack to a specific part inside the destruction target, and can deal a certain amount of damage regardless of the armor strength of the enemy.
  • Cross-Z Rush Arm (クローズラッシュアーム, Kurōzu Rasshu Āmu): The left hand. It specializes in cutting attacks thanks to the sharp blue CB Fang Blades (CBファングオブレイド, CB Fanguo Bureido), and can also use a blasting punch with luminescent-enhanced particles to ward off surrounding enemies.
  • Dragon Fight Glove (CBドラゴンファイトグローブ, CB Doragon Faito Gurōbu): The left hand. Firm grips will super-harden, increase the destructive power of hitting attacks, and protects the fist from recoil damage. The power of the attack increases to respond to the passion of the transformant, and the one-shot deadly finish blow can also be used.
  • CB Vector Robes (CBベクターローブ, CB Bekutā Rōbu): The robes/special propulsion unit. It has a built-in propulsion accelerator that uses a luminescence enhancer, and can fly around the battle area at high speed.
  • Cross-Z Rush Leg (クローズラッシュレッグ, Kurōzu Rasshu Reggu): The right leg. It is good at ambush knee drops from the sky that makes use of its jumping power, and it is also possible to scavenge surrounding enemies with a blast kick wearing luminescent enhanced particles.
  • CB Dragon Foot Shoe (CBドラゴンフットシューズ, CB Doragon Futto Shūzu): The right foot. Equipped with a footwork optimization function, it is possible to play with enemies with lean movements such as sliding on the ground. The power of the attack increases so as to respond to the passion of the transformant.
  • Build Rush Leg (ビルドラッシュレッグ, Birudo Rasshu Reggu): The left leg. It is highly agile and specializes in multi-stage high-speed high jumps by using the dimensional telescopic spring CB Dimension Springer (CBディメンションスプリンガー, CB Dimenshon Supuringā). It is also possible to freely expand and contract his legs and hit a kick at a distant enemy.
  • CB Rabbit Foot Shoe\CBラビットフットシューズ (CB Rabitto Futto Shūzu): The left foot. It is good at light footwork, and it is possible to launch a kick attack that interweaves acrobatic actions such as the Moonsault (ムーンサルト, Mūnsaruto).

This form's finisher is the Love and Peace Finish (ラブ&ピース, Rabu Ando Pīsu Finisshu): Build use the Best Match Rabbit to jump high into air as he performs a Rider Kick, before Best Match Dragon flies behind him, breaths fire, sending him high into the air before a golden and silver double helix energy chart securing the enemy before delivering an another Rider Kick whilst riding the chart's line.

Appearances: Kamen Rider Build: Be The One, Kamen Rider Build: Final Stage

SpiderCooler is the Best Match form for this bottle. To see all possible form combinations, see Spider Halfbody and Reizoko Halfbody.

SpiderCooler Form
KRBu-Buildspidercooler

SpiderCooler Form

"Spider! Reizoko! Best Match! Are you ready? (Drum and bass music) Reikyaku no trap master! SpiderCooler! Yeah!"
―SpiderCooler's transformation announcement[src]

SpiderCooler Form (スパイダークーラーフォーム, Supaidā Kūrā Fōmu) is Build's purple and white Best Match form accessed with the Spider and Reizoko Fullbottles, hence known as the Cooling Trap Master (冷却のトラップマスター, Reikyaku no Torappu Masutā). It is a Hokuto Best Match, and is themed after a spider and a refrigerator.

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).

BatEngine is the Best Match form for this bottle. To see all possible form combinations, see Bat Halfbody and Engine Halfbody.

BatEngine Form
KRBu-Buildbatengine

BatEngine Form

"Bat! Engine! Best Match! Are you ready? (Gothic rock music) Ankoku no kidō-ō! BatEngine! Yeah!"
―BatEngine's transformation announcement[src]

BatEngine Form (バットエンジンフォーム, Batto Enjin Fōmu) is Build's purple and scarlet Best Match form accessed with the Bat and Engine Fullbottles, hence known as the Dark Mobility King (暗黒の機動王, Ankoku no Kidō-ō). It is a Seito Best Match, and is themed after a bat and an engine.

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).

HachiMarine is the Best Match form for this bottle. To see all possible form combinations, see Hachi Halfbody and Sensuikan Halfbody.

HachiMarine Form
KRBu-Buildhachimarine

HachiMarine Form

"Hachi! Sensuikan! Best Match! Are you ready? (Rock music) Shinkai no shigotonin! HachiMarine! Yeah!"
―HachiMarine's transformation announcement[src]

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 a Seito Best Match, and is themed after a bee and a submarine.

In this form, Build gains a stinger on his right index finger.

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).

SaiDryer is the Best Match form for this bottle. To see all possible form combinations, see Sai Halfbody and Dryer Halfbody.

SaiDryer Form
KRBu-Buildsaidryer

SaiDryer Form

"Sai! Dryer! Best Match! Are you ready? (Ukulele music) Chō netsu tairiku! SaiDryer! Yeah!"
―SaiDryer's transformation announcement[src]

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 a Seito Best Match, and 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).

GoldScorpion is the Best Match form for this bottle. To see all possible form combinations, see Scorpion Halfbody and Gold Halfbody.

GoldScorpion Form
KRBu-Buildgoldscorpion

GoldScorpion Form

"Scorpion! Gold! Best Match! Are you ready? (Egyptian-themed rock music) Kōki naru dokubari! GoldScorpion! Yeah!"
―GoldScorpion's transformation announcement[src]

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).

These Forms are exclusive to Kamen Rider Battle: Ganbarizing.

UniRaser is the Best Match form for this bottle. To see all possible form combinations, see Unicorn Halfbody and Keshigomu Halfbody.

UniRaser Form
KRBu-Builduniraser

UniRaser Form

"Unicorn! Keshigomu! Best Match! Are you ready? (Piano music) Ikkaku shōkyo! UniRaser! Yeah!"
―UniRaser's transformation announcement[src]

UniRaser Form (ユニレイサーフォーム, Yuni Reisā Fōmu) is Build's azure 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 is a Hokuto Best Match, and themed after a unicorn and an eraser.

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).

TurtleTime is the Best Match form for this bottle. To see all possible form combinations, see Turtle Halfbody and Watch Halfbody.

TurtleWatch Form
KRBu-Buildturtlewatch

TurtleWatch Form

"Turtle! Watch! Best Match! Are you ready? (Rock music) Toki o kakeru katchū! TurtleWatch! Yeah!"
―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 a Hokuto Best Match, and 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.

BeetleCamera is the Best Match form for this bottle. To see all possible form combinations, see Kabutomushi Halfbody and Camera Halfbody.

BeetleCamera Form
KRBu-Buildbeetlecamera

BeetleCamera Form

"Kabutomushi! Camera! Best Match! Are you ready? (Tropical rock music) Mitsurin no scoop king! BeetleCamera! Yeah!"
―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 a Hokuto Best Match, and is themed after a rhinoceros beetle and a camera.

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).

DogMic is the Best Match form for this bottle. To see all possible form combinations, see Dog Halfbody and Mic Halfbody.

DogMic Form
KRBu-Builddogmic

DogMic Form

"Dog! Mic! Best Match! Are you ready? (Heavy metal music) Iyashi no daibakuon! DogMic! Yeah!"
―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 a Hokuto Best Match, and 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).

MerryChristmas is the Best Match form for this bottle. To see all possible form combinations, see Santa Claus Halfbody and Cake Halfbody.

MerryChristmas Form
KRBu-Buildmerrychristmas

MerryChristmas Form

"Santa Claus! Cake! Best Match! Are you ready? (Christmas music) Seinaru shisha! MerryChristmas! Yeah!"
―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 Holy Envoy (聖なる使者, Seinaru Shisha). It is a Hokuto Best Match, and 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).

ShikaMid is the Best Match form for this bottle. To see all possible form combinations, see Shika Halfbody and Pyramid Halfbody.

ShikaMid Form
KRBu-Buildshikamid

ShikaMid Form

"Shika! Pyramid! Best Match! Are you ready? (Ancient Egyptian music) Ōke no mamorigami! ShikaMid! Yeah!"
―ShikaMid's transformation announcement[src]

ShikaMid Form (シカミッドフォーム, ShikaMiddo Fōmu) is Build's cobalt blue and tan Best Match form accessed with the Shika and Pyramid Fullbottles, hence known as the Royal Family Guardian (王家の守り神, Ōke no Mamorigami). It is a Seito Best Match, and is themed after a deer and a pyramid.

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).

PenguinSkater is the Best Match form for this bottle. To see all possible form combinations, see Penguin Halfbody and Sukebo Halfbody.

PenguinSkater Form
KRBu-Buildpenguinskater

PenguinSkater Form

"Penguin! Sukebo! Best Match! Are you ready? (Folk music) Kōri no suberi-gei! PenguinSkater! Yeah!"
―PenguinSkater's transformation announcement[src]

PenguinSkater Form (ペンギンスケーターフォーム, Pengin Sukētā Fōmu) is Build's silver and green Best Match form accessed with the Penguin and Sukebo Fullbottles, hence known as the Ice Sliding Peformer (氷のすべり芸, Kōri no suberi-gei). It is a Seito Best Match, and is themed after a penguin and a skateboard.

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).

MagGhost is the Best Match form for this bottle. To see all possible form combinations, see Obake Halfbody and Magnet Halfbody.

Besides MagGhost, Obake also has a Legend Rider Best Match with Parka as Ghost Form.

MagGhost Form
KRBu-Buildmagghost

MagGhost Form

"Obake! Magnet! Best Match! Are you ready? (Theremin music) Samayōeru chōinryoku! MagGhost! Yeah!"
―Transformation announcement[src]

MagGhost Form (マグゴーストフォーム, Magu Gōsuto Fōmu) is Build's white and blue Best Match form accessed with the Obake and Magnet Fullbottles, hence known as the Wandering Attraction (彷徨える超引力, Samayōeru Chōinryoku). It is a Seito Best Match, and is themed after a ghost and a magnet.

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).

The Magnet Fullbottle was released as a Uniqlo exclusive, coming with a special Ganbarizing card for MagGhost Form.

Momotaros's only Best Match form, with Densya, is a Legend Rider Best Match as Den-O Form. To see all possible form combinations, see Momotaros Halfbody.

Rider Card's only Best Match form, with Camera, is a Legend Rider Best Match as Decade Form. To see all possible form combinations, see Rider Card Halfbody.

Tantei's only Best Match form, with USB Memory, is a Legend Rider Best Match as W Form. To see all possible form combinations, see Tantei Halfbody and USB Memory Halfbody.

Yujou's only Best Match form, with Rocket, is a Legend Rider Best Match as Fourze Form. To see all possible form combinations, see Yujou Halfbody.

Mahoutsukai's only Best Match form, with Diamond, is a Legend Rider Best Match as Wizard Form. To see all possible form combinations, see Mahoutsukai Halfbody.

Orange's only Best Match form, with Lock, is a Legend Rider Best Match as Gaim Form. To see all possible form combinations, see Orange Halfbody.

Ex-Aid Form is the Best Match form for this bottle. To see all possible form combinations, see Doctor Halfbody and Game Halfbody.

DoctorGame Form
"Doctor! Game! Best Match! Are you ready? Ex-Aid! Mighty jump! Mighty kick! Mighty Mighty Action X![31]"
―DoctorGame Form's transformation announcement[src]
KRBu-Builddoctorgame

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.

During the transforming sequence, the Doctor and Game halfbodies can be inside the Snap Ride Builder as the Ex-Aid Form is formed.

DoctorGame Snap Ride 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).

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 Form
KRBu-BuildEx-Aid

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]
Rider Statistics
  • Rider Height: 205 cm.[7]
  • Rider Weight: 97 kg.[7]
Ability Parameters
  • Punching Power: 5.7 t.[7]
  • Kicking Power: 10.2 t.[7]
  • Maximum Jump Height: 43.1 m.[7]
  • Maximum Running Speed: 100 m. per 3.2 sec.[7]

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
KRBu-BuildDen-O

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
KRBu-BuildGhost

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
KRBu-BuildGaim

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
KRBu-BuildWizard

Wizard Form

"Mahoutsukai! Diamond! Best Match! Are you ready? Wizard! Please! Hi-Hi, Hi-Hi-Hi!"
―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
KRBu-BuildFourze

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 Basestates. It is accessed with the Yujou and Rocket Fullbottles.

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

OOO Form
KRBu-BuildOOO

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
KRBu-BuildW

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
BuildDecadeForm

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 biotic like it normally is, but instead something abiotic (card) that represents something biotic (Rider).

Main article: Kamen Rider Evol

Cobra Form (Phase 1)
KRBu-Evolcobra Phase1

Cobra Form

"Cobra! Rider System! Evolution! Are you ready? Cobra! Cobra! Evol Cobra! Fuhahahahahahahaha!"
―Transformation announcement[src]
Rider Statistics
  • Height: 195 cm.
  • Weight: 108 kg.
Ability Parameters
  • Punching power: 58 t.
  • Kicking power: 63 t.
  • Maximum jump height: 76.7 m.
  • Maximum running speed: 100 m. per 1.1 sec.

Cobra Form (コブラフォーム, Kobura Fōmu) is Evol's primary and default form accessed with the Cobra and Rider Evolbottles. Evolto labels this form as "Phase 1" (フェーズ1, Fēzu Wan).

As Evol, Evolto possesses tremendous power, as the Evol-Driver allows him to tap on the full power of the Pandora Box. His parameters blow far past Grease, Rogue, and even Cross-Z Magma by a small margin. He also surpasses Build's RabbitRabbit and TankTank forms, though he loses to RabbitRabbit by maximum jump height and running speed, and TankTank by maximum kicking power.

Despite these small disadvantages, he still possesses abilities that are almost impossible to counteract, including teleportation and generating energy in his hand to perform an energy blast. He is also able to attack in extremely high speeds and block attacks quite easily, as shown during his first fight with Rogue.

His Evol Cobra Head (EVO-コブラヘッド, Ebo Kobura Heddo) contains the Xeno Head Armor (ゼノヘッドアーマー, Zeno Heddo Āmā) which strengthens its durability within each Phase. Between his EVO Twin Eye Cobra (EVOツインアイコブラ, Ebo Ai Kobura) lies the Master Planisphere (マスタープラニスフィア, Masutā Puranisufia), a device that allows him to determine which celestial body is his next target and formulate the suitable method of destroying it.[32]

In this form, Evol's armor parts are:

  • EVO Cobra Shoulder (EVOコブラショルダー, Ebo Kobura Shorudā): A pair of shoulder armor that allows him to improve attack accuracy. Each has a built-in miniature plant that secretes toxic gases as enhancers of the user's ability.[33]
  • Menace Rush Arms (メナスラッシュアーム, Menasu Rasshu Āmu): Evol's arms. Through an unknown substance that filled his suit, Evol's strength and speed are enhanced. By himself, Evol can manipulate a special aura that can move objects at will or detain his opponents.[34]
  • EVO Xeno Vader Gloves (EVOゼノベイダーグローブ, Ebo Zeno Beidā Gurōbu): Enhanced combat gloves that allows him to create strong punches by manipulating nearby space.[35]
  • Menace Rush Legs (メナスラッシュレッグ, Menasu Rasshu Reggu): Evol's leg units. Through an unknown substance that filled his suit, Evol's strength and speed are enhanced. By himself, Evol can manipulate a special aura that allows him to move objects or run at a tremendous speed.[36]
  • EVO Xeno Vader Shoes (EVOゼノベイダーシューズ, Ebo Zeno Beidā Shūzu): Evol's combat shoes. Each can perform kick attacks by manipulating nearby space.[37]
  • Xeno Chest Armor (ゼノチェストアーマー, Zeno Chesuto Āmā): Chhest armor which compresses and produces unknown substances within the Evolbottles. Said armor is stronger than any material on Earth and its durability increases within each Phase.[38]
  • Armilla Reactor (アーミラリアクター, Āmira Riakutā): An Armillary sphere-themed conversion furnace which converts the unknown substance within Evolbottles into strong destructive energy. By completing all Phases, it can demonstrate its true ability.[39]
  • EVO Omniverse Suit (EVOオムニバーススーツ, Ebo Omunibāsu Sūtsu): An enhanced battle suit that can emit blocking energy field, allowing Evol to protect himself from enemy attacks or carry out planetary destruction safely. It can also draw out the user's hidden ability and strengthen them based on the Phase.[40]
  • EVO Material (EVOマテリアル, Ebo Materiaru): Golden armor parts on Evol's body. They can amplify Evolto's special abilities, empower wave attacks, generate annihilation poisons and allow warp teleportation.[41]

Carried over from from Blood Stalk, Evol wields the Transteam Gun and Steam Blade in this form. He is also able to wield any of Build's weapons if he inserts the corresponding Fullbottle into the Evol-Driver along with Rider Evolbottle.

Appearances: Build Episode 37

Rabbit Form (Phase 3)
KRBu-Evolrabbitform Phase3

Rabbit Form

"Rabbit! Rider System! Evolution! Are you ready? Rabbit! Rabbit! Evol Rabbit! Fuhahahahahahahaha!"
―Transformation announcement[src]
Rider Statistics
  • Height: 197 cm.
  • Weight: 106.8 kg.
Ability Parameters
  • Punching power: 55.9 t.
  • Kicking power: 64.1 t.
  • Maximum jump height: 89 m.
  • Maximum running speed: 100 m. per 1 sec.

Rabbit Form (ラビットフォーム, Rabitto Fōmu) is Evol's Build-based form accessed with the Rabbit and Rider Evolbottles. Evolto assumes this form while he is in possession of Sento and labels it as "Phase 3" (フェーズ3, Fēzu Surī).

In this form Evolto has weaker punching power than Cobra and Dragon Form and his kicking power is slightly better than Cobra Form, but still weaker than Dragon Form. However, his maximum jumping height and running speed have increased dramatically, surpassing both of his previous forms.

Evol's weapon in this form is the Drill Crusher.

This form has two finishers:

  • Evol Driver Finishers:
    • Evoltic Finish (エボルテックフィニッシュ, Eborutekku Finisshu) This finisher has two variations:
      • Rider Kick: Evol delivers a roundhouse kick covered in red and orange energy that generates an energy star map upon impact.
      • Rider Punch: Evol delivers a punch covered in flames and purple energy that sends the target flying.
Appearances: Build Episodes 36-37

Equipment[]

Devices[]

  • Build Driver - Transformation device.
  • Fullbottles - Transformation trinkets.
  • Fullbottle Holder - Carrying strap for Fullbottles.
  • Hazard Trigger - Build's power up device, used to upgrade into a Hazard Form by attaching it to the Build Driver.
  • Evol-Driver - Evol's transformation device. Used while possessed by Evolto.
  • Evolbottles - Evol's transformation trinkets. Used while possessed by Evolto.
  • Build Phone - Build's personal smartphone that can transform into the Machine Builder.

Weapons[]

Handheld Weapons

  • Drill Crusher - Build's personal drill-like weapon.
  • Hawk Gatlinger - Build's gatling gun-like weapon accessed by any form that uses the Taka[3] or Gatling Fullbottles. Also used by RabbitTank Sparkling Form.
  • 4Koma Ninpoutou - Build's katana-like weapon accessed by any form that uses the Ninjya or Comic Fullbottles. Also used by RabbitTank Sparkling Form.
  • Kaizoku Hassyar - Build's bladed bow-like weapon accessed by any form that uses the Kaizoku or Densya Fullbottles. Also used by RabbitTank Sparkling Form.
  • Fullbottle Buster - Build's personal sword-like and cannon-like weapon, accessed by any form that uses the FullFull RabbitTank Bottle. Also used by Genius Form.

Suit-Equipped Weapons

  • Rabbit Foot Shoes - Build's rabbit-like spring shoe accessed by any form that uses the Rabbit Fullbottle.
  • Tank Roller Shoes - Build's tank-like tread shoe accessed by any form that uses the Tank Fullbottle.
  • Muscle Glove - Build's gorilla-like gauntlet 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.
  • Celestial Wings - Build's hawk-like wings accessed by any form that uses the Taka Fullbottle.
  • Onmitsu Scarf - Build's ninja scarf accessed by any form that uses the Ninjya 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 gauntlet and wings accessed by any form that uses the Phoenix Fullbottle
  • Demolition One and BLD Arsenal Shoulder - Build's robot-like claw arm accessed by any form that uses the Robot Fullbottle
  • Wolfatal Claw - Build's wolf-like claw accessed by any form that uses the Wolf Fullbottle
  • Build Pad Shield - Build's Build Phone-like shield accessed by any form that uses the Smapho Fullbottle
  • Ibalash Arm - Build's thorn-like gauntlet accessed by any form that uses the Rose Fullbottle
  • Batrotor Blade - Build's helicoptor-like rotor accessed by any form that uses the Helicopter fullbottle
  • BLD Tora Fight Glove and Jungle Foot Shoes - Build's tiger-like glove and shoe accessed by any form that uses the Tora Fullbottle
  • Inbay Dodge Shoes - Build's UFO-like shoe accessed by any form that uses the UFO Fullbottle
  • Navy Chest Armor and BLD Spout Glove - Build's whale-like chestplate and glove accessed by any form that uses the Kujira Fullbottle
  • HZ Deadly Gloves and HZ Vanish End Shoes - Build's gloves and shoes accessed by any Hazard Form

Vehicles[]

Legend Rider Devices[]

KRDCD-KamenRide Build Rider Card

KamenRide: Build

KamenRide: Build (カメンライドビルド, Kamenraido Birudo): A Rider Card containing the power of Kamen Rider Build.Transforms Decade into Build RabbitTank Form.

KRDCD-KamenRide Build Genius Form Rider Card

KamenRide: Build Genius Form

KamenRide: Build Genius Form (カメンライドビルドジーニアスフォーム, Kamenraido Birudo Jīniasu Fōmu):

KRDCD-Final AttackRide Build Rider Card

Final AttackRide: Build

Final AttackRide: Build (ファイナルアタックライドビルド, Fainaru Atakkuraido Birudo):

KREA-Kamen Rider Build Gashat

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 to protect their Gamer Drivers from the effects of the Enigma and both Kuroto Dan and Emu Hojo also used this gashat in their Gashacon Breakers against Nebula Bugsters 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.

"(Digital beeping) Build!"
―Activation announcement[src]

"Best Match! Fullbottle de henshin-suru tensai Rider wa... Build da!

Translation: Best Match! The genius Rider who transforms with Fullbottles is... (Clock ticking noise) Build! (ベストマッチ!フルボトルで変身する天才ライダーは…ビルドだ!)"
―Secondary activation announcement[src]

"Rider Time! (Electronic rock music) Best Match! Build!"
―Transformation announcement in the Ziku-Driver's right-hand slot[src]

"(Right-hand Ridewatch's announcement)! Armor Time! (Electronic rock music) Best Match! Build!"
―Rider Armor transformation announcement[src]

"Finish Time! Build! Vortex Time (Break/Burst/Jack)!"
―Rider Armor finisher announcement[src]

Build Ridewatch (ビルドライドウォッチ, Birudo Raidowotchi): Based on Kamen Rider Build RabbitTank Form, this Ridewatch provides access to the BuildArmor used by Zi-O or Geiz. It is dated 2017.

It was manifested by Sento Kiryu from a Blank Watch given by Sougo Tokiwa.

"(Digital beeping) Sparkling!"
―Activation announcement[src]

"Pandora no chikara de hajikeru power! Build RabbitTank Sparkling!

Translation: Power bursts from the power of Pandora! Build RabbitTank Sparkling! (パンドラの力ではじけるパワー!ビルドラビットタンクスパークリング!)"
―Secondary activation announcement[src]

"(Right-hand Ridewatch's announcement)! Armor Time! (Soda can opening noise) RabbitTank Sparkling!"
―Transformation announcement in the Ziku-Driver's left-hand slot[src]

"Finish Time! Build! Vortex Time (Break/Burst/Jack)!"
―Finisher announcement in left-hand slot[src]

Build RabbitTank Sparkling Ridewatch (ビルドラビットタンクスパークリングフォームライドウォッチ, Birudo RabittoTanku Supākuringu Fōmu Raidowotchi): Based on Kamen Rider Build RabbitTank Sparkling Form, this Ridewatch would provide access to the BuildRabbitTankSparklingArmor. It is dated 2017.

"(Digital beeping) Hazard!"
―Activation announcement[src]

"Yabei! Shikkoku no bouso senshi, RabbitTank Hazard!

Translation: Oh no! The jet black rampaging warrior, RabbitTank Hazard! (ヤッベーイ!漆黒の暴走戦士、ラビットタンクハザード!)"
―Secondary activation announcement[src]

"Rider Time! (Hazard Form's transformation music) Yabei! Hazard!"
―Transformation announcement in the Ziku-Driver's right-hand slot[src]

"(Right-hand Ridewatch's announcement)! Armor Time! (Hazard Form's transformation music) Yabei! Hazard!"
―Rider Armor transformation announcement[src]

"Finish Time! Build! Hazard Time (Break/Burst/Jack)!"
―Rider Armor finisher announcement[src]

Build RabbitTank Hazard Form Ridewatch (ビルドラビットタンクハザードフォームライドウォッチ, Birudo RabittoTanku Hazādo Fōmu Raidowotchi): Based on Kamen Rider Build RabbitTank Hazard Form, this Ridewatch would provide access to the BuildRabbitTankHazardFormArmor. It is dated 2017.

"(Digital beeping) RabbitRabbit!"
―Activation announcement[src]

"Cho speed! Cho jump! Build RabbitRabbit Form!

Translation: Super speed! Super jump! Build RabbitRabbit Form! (超スピード!超ジャンプ!ビルドラビットラビットフォーム!)"
―Secondary activation announcement[src]

"(Right-hand Ridewatch's announcement)! Armor Time! (Techno pop music with hopping sounds) Haei! RabbitRabbit!"
―Transformation announcement in the Ziku-Driver's left-hand slot[src]

"Finish Time! Build! RabbitRabbit Time (Break/Burst/Jack)!"
―Finisher announcement in left-hand slot[src]

Build RabbitRabbit Form Ridewatch (ビルドラビットラビットフォームライドウォッチ, Birudo RabittoRabitto Fōmu Raidowotchi): Based on Kamen Rider Build RabbitRabbit Form, this Ridewatch would provide access to the BuildRabbitRabbitFormArmor. It is dated 2017.

"(Digital beeping) TankTank!"
―Activation announcement[src]

"Cho soukou! Cho juuryou! Build TankTank Form!

Translation: Super armor! Super weight! Build TankTank Form! (超装甲!超重量!ビルドタンクタンクフォーム!)"
―Secondary activation announcement[src]

"(Right-hand Ridewatch's announcement)! Armor Time! (Techno rock music) Tuei! TankTank!"
―Transformation announcement in the Ziku-Driver's left-hand slot[src]

"Finish Time! Build! TankTank Time (Break/Burst/Jack)!"
―Finisher announcement in left-hand slot[src]

Build TankTank Form Ridewatch (ビルドタンクタンクフォームライドウォッチ, Birudo TankuTanku Fōmu Raidowotchi): Based on Kamen Rider Build TankTank Form, this Ridewatch would provide access to the BuildTankTankFormArmor. It is dated 2017.

"(Digital beeping) Genius!"
―Activation announcement[src]

"Monosugei! Bottle darake no cho tensai Rider! Build Genius Form!

Translation: Very amazing! The super-genius Rider full of bottles! Build Genius Form! (モノスゲーイ!ボトルだらけの超天才ライダー!ビルドジーニアスフォーム!)"
―Secondary activation announcement[src]

"Rider Time! (Genius Form's transformation music) Chou tensai! Build Genius!! Genius!"
―Transformation announcement in the Ziku-Driver's right-side slot[src]

"Armor Time! (Genius Form's transformation music) Chou tensai! Build Genius~! Genius!"
―Transformation announcement[src]

"Finish Time! Build! Genius Time (Break/Burst/Jack)!"
―Finisher announcement[src]

Build Genius Form Ridewatch (ビルドジーニアスフォームライドウォッチ, Birudo Jīniasu Fōmu Raidowotchi): Based on Kamen Rider Build Genius Form, this Ridewatch would provide access to the BuildGeniusFormArmor. It is dated 2017[42], but shown on the Ziku-Driver's screen as FIN.

"(Digital beeping) RabbitDragon!"
―Activation announcement[src]

"Kin no rabbit! Gin no dragon! Build RabbitDragon!

Translation: The gold rabbit! The silver dragon! Build RabbitDragon! (金のラビット!銀のドラゴン!ビルドラビットドラゴン!)"
―Secondary activation announcement[src]

"Armor Time! (Electronic rock music) Rabbit! Dragon! RabbitDragon!"
―Transformation announcement[src]

"Finish Time! Love and Peace Time (Break/Burst/Jack)!"
―Finisher announcement[src]

Build RabbitDragon Form Ridewatch (ビルドラビットドラゴンフォームライドウォッチ, Birudo Rabitto Doragon Fōmu Raidowotchi): Based on Kamen Rider Build RabbitDragon Form, this Ridewatch would provide access to the BuildRabbitDragonFormArmor. It is dated 2017.

Another Build Watch (アナザービルドウォッチ, Anazā Birudo Wotchi): A twisted version of the Build Ridewatch used to transform into Another Build.

"Genius!"
―Activation announcement[src]

"Build's ability!"
―Second activation announcement[src]

"Authorise!"
―Transformation standby announcement[src]

"Progrise! Fullbottle shake shake! BestMatching Build! A genius physicist whose mind surpasses all."
―Transformation announcement with the Hiden Zero-One Driver[src]

"BestMatching Impact!"
―Finisher announcement with the Hiden Zero-One Driver[src]

"BestMatching (Bit/Byte/Kilo/Mega/Giga/Tera) Impact!"
―Empowered finisher announcement with the Hiden Zero-One Driver[src]

"Shotrise! BestMatching Build! A genius physicist whose mind surpasses all."
―Transformation announcement with the A.I.M.S. Shotriser[src]

"Genius! BestMatching Blast!"
―Finisher announcement with the A.I.M.S. Shotriser in Gun Mode[src]

"Genius! BestMatching Blast Fever!"
―Finisher announcement with the A.I.M.S. Shotriser in Belt Mode[src]

"Forcerise! BestMatching Build! A genius physicist whose mind surpasses all. Break down."
―Transformation announcement with the MetsubouJinrai Forceriser[src]

"BestMatching Dystopia!"
―Finisher announcement with the MetsubouJinrai Forceriser[src]

"BestMatching Utopia!"
―Secondary finisher announcement with the MetsubouJinrai Forceriser[src]

BestMatching Build Progrisekey (ベストマッチングビルドプログライズキー, Besutomatchingu Birudo Puroguraizu Kī): Based on Kamen Rider Build, this Progrisekey's ability is "Genius".[43]

"Pandorabbit no Build!"
―Activation announcement[src]

"Kono Futatsu no Chikara ga Mazari Au Toki Sekai ni Love & Peace Otozureru

Translation:Love and peace visit the world when these two powers mix. (この2つの力が混ざりあうとき世界にLOVE&PEACEが訪れる…)"
―Story announcement[src]

Pandorabbit no Build Wonder Ride Book (パンドラッビトのビルドワンダーライドブック, Pandorabitto no Birudo Wandā Raido Bukku) is based on Kamen Rider Build and his forms. The book's name is shortened to "Build" in the Swordriver's announcements.

"Kangaroo! (カンガルー!)"
―Activation announcement[src]

"Come on! Ka-Ka-Kangaroo! (カモン!カ!カ!カンガルー!, Kamon! Ka-Ka-Kangarū!)"
―Looping standby announcement with the Revice Driver[src]

"Buddy Up! Tobiagaru! Maiagaru! Kangaroo! Shouri no punch ga kimatta!
(バディアップ!飛び上がる!舞い上がる!カンガルー!勝利のパンチが決まった!, Badi Appu! Tobiagaru! Maiagaru! Kangarū! Shōri no panchi ga kimatta!,
Translation: Buddy Up! Jump up! Get excited! Kangaroo! The punch of victory has been set!)"
―Transformation announcement with the Revice Driver[src]

"Kangaroo Stamping Finish! (カンガルースタンピングフィニッシュ!, Kangarū Sutanpingu Finisshu!)"
―Revice Driver finisher announcement[src]

"Remix! Buddy Up! Hissatsu! Shiagaru! Migaru! Kangaroo!
(リミックス!バディアップ!必殺!仕上がる!身軽!カンガルー!, Rimikkusu! Badi Appu! Hissatsu! Shiagaru! Migaru! Kangarū!,
Translation: Remix! Buddy Up! Certain kill! Finished! Nimble! Kangaroo!)"
―Remix transformation announcement[src]

"Hissatsu Shonin! Kangaroo Stamping Slash! (必殺承認!カンガルースタンピングスラッシュ!, Hissatsu Shōnin! Kangarū Sutanpingu Surasshu!, Translation: Deadly Approval! Kangaroo Stamping Slash!)"
―Finisher announcement with the Ohinbuster50 in Axe Mode[src]

"Hissatsu Shonin! Kangaroo Stamping Strike! (必殺承認!カンガルースタンピングストライク!, Hissatsu Shōnin! Kangarū Sutanpingu Sutoraiku!, Translation: Deadly Approval! Kangaroo Stamping Strike!)"
―Finisher announcement with the Ohinbuster50 in Gun Mode[src]

"Absorb! Build! (アブゾーブ!ビルド!, Abuzōbu! Birudo!)"
―Scanning announcement with the Juuga Driver[src]

"Kangaroo Vortex Attack! (カンガルーボルテックアタック!, Kangarū Borutekku Atakku!)"
―Finisher announcement with the Juuga Driver[src]

Kangaroo Vistamp (カンガルーバイスタンプ, Kangarū Baisutanpu): Allows Revi and Vice to access their Kangaroo Genome. It contains the genetic information of a kangaroo and is based on Kamen Rider Build.

"Build Driver."
―Insertion announcement in the Desire Driver[src]

"Are you ready? Hagane no moonsault! RabbitTank! Yeah! Ready, fight!"
―Standalone Transformation announcement in the Desire Driver[src]

"Build Strike!"
―Standalone finisher announcement in the Desire Driver[src]

"Dual On! (Raise Buckle name)! Are you ready? Hagane no moonsault! RabbitTank! Yeah! Ready, fight!"
―Transformation announcement with a large Raise Buckle in the Desire Driver[src]

"(Raise Buckle name) Build Victory!"
―Finisher announcement with a large Raise Buckle in the Desire Driver[src]

"Boost Time! Boost Build Grand Victory!"
―Boost Time finisher announcement with the Boost Buckle in the Desire Driver[src]

"Kamen Rider Tactical Blast!"
―Finisher announcement in the Magnum Shooter 40X[src]

Build Driver Buckle (ビルドドライバーバックル, Birudo Doraibā Bakkuru): Allows any of the Geats Riders to access Build Form, which is equipped with the Drill Crusher. It is based on Kamen Rider Build and his transformation belt, the Build Driver.

  • Kamen Rider Build (仮面ライダービルド, Kamen Raidā Birudo): Used with Kamen Rider Fourze to access FullFull Rocket.
  • Kamen Rider Build Genius Form (仮面ライダービルドジーニアスフォーム, Kamen Raidā Birudo Jīniasu Fōmu)

Family[]

  • Shinobu Katsuragi/Kamen Rider Build (Another): It wasn't until after Sento regained his memories as Takumi that he remembered the fond times with his father before the Sky Wall Accident. During their reunion, Sento heavily believed Shinobu was fully allied with Evolto, but was extremely distraught when Evolto kills him after realizing he was never truly loyal to him. It was during Shinobu's death that Sento/Takumi realized how much their father had meant to them before he was gone. Shinobu was revived in the New World and their relationships were seem quite well as he actively ask Gentoku was Sento doing well.
  • Kyoka Katsuragi: Sento's mother back as Takumi. She unknowingly returns his flash drive to him containing Project Build.
  • Takumi Katsuragi: Sento had originally lost his will to fight after learning he was Takumi himself. However after some encouragement from Banjo, Sento was able to mentally separate himself from his past self and be just Sento Kiryu, and only Sento Kiryu. Despite being the same person, the two have differing personalities and would often argue in their head over the methods used to defeat Evolto and their father Shinobu. In the end, Takumi realized that Sento's plans were indeed the best way, and that his foolishness would eventually save the world. In the new world, Takumi and Sento are fully aware that their joint existence is an anomaly created by something that simply doesn't exist in the new world, so Takumi voluntarily disappears, allowing Sento to live on as just Sento. Later when Banjo re-activates Pandora's Box during Killbas' rampage, the Takumi Katsuragi of the new world regained his memories, and was willing to help Sento fight Down Fall. He later mentioned the reason as to why he helped was because believed in the same type of hope that Sento did, and would continue to support him in that matter. In Build NEW WORLD: Kamen Rider Grease, they have seen to work together.

Relationships[]

Friends[]

  • Team Build - Teammates and Friends
    • Misora Isurugi: Sento and Misora share a close relationship that began since his first days as Kamen Rider Build. 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 dirty 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 entrusted the Hazard Trigger kill-switch to her, but she immediately disapproved its usage after discovering it would kill Sento. During the war, Misora continued to support Sento in their fight for "love and peace", but often scolded him for always putting others above him in the face of danger, as he was willing to sacrifice himself for the sake of his friends and family.
    • Ryuga Banjo/Kamen Rider Cross-Z (Charge): Sento and Banjo are often described as a "Best Match" since they have stuck with each other and gained immense amounts of trust and respect for each other, despite their constant and playful banter. Sento was initially unaware of how far they took their friendship to the point, he never expected Banjo to do anything in return, despite the latter's wish to do so. Banjo highly respects this friendship and declined Evolto's offer to join him, acknowledging Sento as his one and only partner. When Sento would lose his confidence in fighting, it would always be Banjo to remind him of the justice he originally fought for.
    • Sawa Takigawa: Sento was originally unaware that Sawa was in fact a spy for Nanba, though when he discovered this fact he continued to show the same compassion to her as he would for his own friends and family. This caused Sawa to change her ways and defect from Nanba, as Sento gave her a family she never had as one of Banba's Children. Sento gave her a chance to explain and forgave her, and Sawa upheld her dignity.
    • Kazumi Sawatari/Kamen Rider Grease: The two were originally enemies from two sides of a war, though the attack from Seito forced them to team up, and later become life-long allies. The two recognize that they aren't bad people, evident when Kazumi witnessed the guilt Sento had when he killed Aoba in his Hazard Form. Kazumi quickly forgave him and said it was a normal result of war. With no more hard feelings, they teamed up and Sento in time helped Kazumi liberate Hokuto. Kazumi's trust in Sento was temporarily broken when Sento's feelings for his father had almost jeopardized their mission, though he was quickly forgiven when Sento opened his eyes. When Sento created the fatal Blizzard Knuckle, Kazumi was prepared to die as he learned from Sento about the true justice of being a Kamen Rider. Kazumi's death would later sadden the entire team and cause Sento to harbor a great sense of hate for Evolto.
    • Gentoku Himuro/Night Rogue/Kamen Rider Rogue: Sento was originally unaware of Gentoku's identity as Night Rogue, and viewed the dark knight as nothing but an integral key to his memories, while respecting Gentoku as a trustworthy senior employee. However when Evolto exposed Gentoku's identity to Sento, Sento was conflicted with his allegiance to Gentoku, but was forced to work with him to fight Hokuto. After Gentoku returned as Kamen Rider Rogue while allied with Seito, Sento was heavily criticized for his motives during the war and blamed Takumi's faults on him. Gentoku later retracted his words after talking to Sento (who at the time had Takumi's memories), and over time proved himself to be a valuable friend and ally to Sento during their fight against Evolto.
    • Nariaki Utsumi/Night Rogue/Kamen Rider MadRogue: Sento used to respect Utsumi as a fellow researcher, but could not take him seriously as a person due to his no-nonsense attitude. Utsumi was later tasked by Evolto to help Sento raise his Hazard Level in preperation for his duel against Grease, not knowing Utsumi was also perfecting the Kaiser system. They became enemies when Utsumi swore loyalty to Evolto, but became his greatest ally once he revealed he only did so get close to Evolto and get revenge for Namba's death. In the New World, Utsumi joins forces with Sento and Team Build against Down Fall.

Allies[]

  • Soichi Isurugi: To Sento, Soichi Isurugi was the loving father of Misora and his only ally during his early days as Kamen Rider Build. He believed in the genuine hospitality that "Soichi" provided to him every time he came home. That, however all began to disappear when Soichi was revealed to be Blood Stalk and possessed by an alien. To this day, Sento continues to fight in the justice that "Soichi" taught him, against Evolto.
  • 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. In Heisei Generations FINAL, Sento later gives Emu back his powers by handing him the Doctor & Game Fullbottles.
  • 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: In Heisei Generations FINAL, Parado encountered Sento into his homeworld and demands Sento to give Emu his powers back. Sento later remembers Parado as the red and blue Kamen Rider from their previous encounter in Kamen Rider Ex-Aid: True Ending.
  • 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.
  • Taizan Himuro: Taizan is on good terms with Sento, having trusted him that he'll win in the proxy duel with Grease and Rogue. Taizan would later entrust Sento in planning out the attacks against Seito, shortly before his death.
  • Sougo Tokiwa/Kamen Rider Zi-O:to be added

Enemies[]

  • Evolto/Blood Stalk/Kamen Rider Evol: Sento holds an immense hatred for Evolto, as he was the one responsible for turning him from Takumi Katsuragi into Sento Kiryu, and withhold this fact while indoctrinating him into a "hero of justice" for Evolto's evil and malicious plans. Despite their now antagonistic relationship, Sento continues to receive "help" from Evolto, unknowingly doing so in exchange for Evolto to get closer to reaching his final form. Their relationship hit its peak once Banjo was absorbed and Kazumi was killed, and Sento no longer felt any sort of goodness in Evolto anymore. When in their battle against Killbus, Evolto proved himself a useful yet valuable ally once again, as he returned to space once again.
  • Kengo Ino/Kamen Rider Blood: He captured and brainwashed Banjo and later both Sento & Banjo destroyed him as Cross-ZBuild.

Behind the Scenes[]

Portrayal[]

Sento Kiryu is portrayed by Atsuhiro Inukai (犬飼 貴丈, Inukai Atsuhiro), who also portrays Taro Satou. As Takumi Katsuragi, he was portrayed by Yukiaki Kiyama (木山 廉彬, Kiyama Yukiaki). Under the possession of Evolto, he is voiced by Tetsuo Kanao (金尾 哲夫, Kanao Tetsuo).

As Kamen Rider Build, his suit actors were Seiji Takaiwa (高岩 成二, Takaiwa Seiji) and Yuya Nawata (縄田 雄哉, Nawata Yuya) in his televised debut in the 44th episode of Kamen Rider Ex-Aid and Yuji Nakata (中田 裕士, Nakata Yūji) in the last four episodes of the series. Under the possession of Evolto as Kamen Rider Evol, his suit actor is Kazuya Okada (岡田 和也, Okada Kazuya).

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), is composed of the first kanji for tank (戦車, Sensha) and the kanji for rabbit (, To); this is referring to Build's primary form, RabbitTank. The surname "Kiryu" was, according to Soichi, the name of his regular barber shop.

Notes[]

  • In Toei's attempt to bring the franchise back to its roots, Sento's character history involving his imprisonment and experimentation on by Faust is a callback to the Shocker experimentation origins of the Showa Era Riders.
  • As revealed by Atsuhiro Inukai, his habit of playing Monster Hunter with friends at night caused him to appear worn and haggard when filming Kamen Rider Build, with it being used to portray Sento's gradual fatigue facing Faust.
  • Despite Sento being a physicist, he is mostly seen doing chemistry in the show, such as when he created the RabbitTank Sparkling Fullbottle by extracting the Nebula gas from the Rabbit and Tank Fullbottles using a process similar to distillation. He has also displayed skills in engineering as seen with the creation of his many weapons created for his Best Match forms.

Appearances[]

References[]

  1. Influenced by the Hazard Trigger
  2. Possessed by Evolto
  3. 3.0 3.1 https://cdn.discordapp.com/attachments/332295916084002817/424937302792601602/tumblr_p5nz7rrkkA1wrt8h0o1_1280.jpg
  4. http://www.tv-asahi.co.jp/build/rider/build-kaizokuressya-form/
  5. [1]
  6. http://www.tv-asahi.co.jp/build/rider/build-toraufo-form/
  7. 7.00 7.01 7.02 7.03 7.04 7.05 7.06 7.07 7.08 7.09 7.10 7.11 7.12 7.13 7.14 7.15 7.16 7.17 Toei. (2019). Kamen Rider Zukan. Forms Zukan
  8. https://www.tv-asahi.co.jp/build/rider/build-rabbittank-sparkling-form/
  9. 9.0 9.1 "TV Asahi's stats for Build RabbitTank Hazard". https://www.tv-asahi.co.jp/build/rider/build-rabbittank-hazard-form/000.html. 
  10. 10.0 10.1 "Kamen Rider Official's page for Build RabbitTank Hazard". https://www.kamen-rider-official.com/zukan/form/33. 
  11. 11.0 11.1 "Kamen Rider Official's page for Build SmaphoWolf Hazard". https://www.kamen-rider-official.com/zukan/form/36. 
  12. 12.0 12.1 "TV Asahi's stats for Build HawkGatling Hazard". https://www.tv-asahi.co.jp/build/rider/build-hawkgatling-hazard-form/000.html. 
  13. 13.0 13.1 "Kamen Rider Official's page for Build HawkGatling Hazard". https://www.kamen-rider-official.com/zukan/form/34. 
  14. "TV Asahi's stats for Build KaizokuRessya Hazard". https://www.tv-asahi.co.jp/build/rider/build-kaizokuressya-hazard-form/000.html. 
  15. "Kamen Rider Official's page for Build KaizokuRessya Hazard". https://www.kamen-rider-official.com/zukan/form/35. 
  16. 16.0 16.1 "TV Asahi's stats for Build KeyDragon Hazard". https://www.tv-asahi.co.jp/build/rider/build-keydragon-hazard-form/000.html. 
  17. 17.0 17.1 "Kamen Rider Official's page for Build KeyDragon Hazard". https://www.kamen-rider-official.com/zukan/form/37. 
  18. 18.0 18.1 https://buildridernews.tumblr.com/post/171610487869/since-they-have-no-more-riders-to-do-this-with-i
  19. 19.0 19.1 "TV Asahi's stats for Build RabbitRabbit". https://www.tv-asahi.co.jp/build/rider/build-rabbitrabbit-form/000.html. 
  20. 20.0 20.1 "Kamen Rider Official's page for Build RabbitRabbit". https://www.kamen-rider-official.com/zukan/form/38. 
  21. 21.0 21.1 "TV Asahi's stats for Build TankTank". https://www.tv-asahi.co.jp/build/rider/build-tanktank-form/000.html. 
  22. 22.0 22.1 "Kamen Rider Official's page for Build TankTank". https://www.kamen-rider-official.com/zukan/form/39. 
  23. 23.0 23.1 "TV Asahi's stats for Build Genius". https://www.tv-asahi.co.jp/build/rider/build-genius-form/000.html. 
  24. 24.0 24.1 "Kamen Rider Official's page for Build Genius". https://www.kamen-rider-official.com/zukan/form/40. 
  25. http://tokuconnect.tumblr.com/post/170675667184/the-third-kamen-rider-build-toy-catalogue-has
  26. 26.0 26.1 "TV Asahi's stats for Build RabbitDragon". https://www.tv-asahi.co.jp/build/rider/build-trialform-rabbitdragon/000.html. 
  27. 27.0 27.1 "Kamen Rider Official's page for Build RabbitDragon". https://www.kamen-rider-official.com/zukan/form/31. 
  28. 28.0 28.1 "Kamen Rider Official's page for Build KumaTV". https://www.kamen-rider-official.com/zukan/form/16. 
  29. 29.0 29.1 "Kamen Rider Official's page for Build SameBike". https://www.kamen-rider-official.com/zukan/form/17. 
  30. "Kamen Rider Official's page for Cross-ZBuild". https://www.kamen-rider-official.com/zukan/forms/42. 
  31. http://bandaicandy.hateblo.jp/entry/build50
  32. http://www.tv-asahi.co.jp/build/rider/evol-cobra-head/
  33. http://www.tv-asahi.co.jp/build/rider/evol-cobraform-phase1/002.html
  34. http://www.tv-asahi.co.jp/build/rider/evol-cobraform-phase1/003.html
  35. http://www.tv-asahi.co.jp/build/rider/evol-cobraform-phase1/004.html
  36. http://www.tv-asahi.co.jp/build/rider/evol-cobraform-phase1/005.html
  37. http://www.tv-asahi.co.jp/build/rider/evol-cobraform-phase1/006.html
  38. http://www.tv-asahi.co.jp/build/rider/evol-cobraform-phase1/007.html
  39. http://www.tv-asahi.co.jp/build/rider/evol-cobraform-phase1/008.html
  40. http://www.tv-asahi.co.jp/build/rider/evol-cobraform-phase1/009.html
  41. http://www.tv-asahi.co.jp/build/rider/evol-cobraform-phase1/011.html
  42. https://toy.bandai.co.jp/series/rider/item/detail/5847/
  43. https://toy.bandai.co.jp/series/rider/item/detail/11146/

External Links[]

Navigation[]

Icon-build Kamen Rider Build
Kamen Riders
TV-Series: Sento Kiryu (Takumi Katsuragi) - Ryuga Banjo - Kazumi Sawatari - Gentoku Himuro - Evolto - Nariaki Utsumi - Shinobu Katsuragi
Movie-exclusive: Kengo Ino - Killbus - Keiji Uraga
Gear
Drivers/Transformation Gear
Build Driver - Transteam Gun - Nebulasteam Gun - Sclash Driver - Evol-Driver
Build Driver Adapters
(Great) Cross-Z Dragon - Hazard Trigger - Cross-Z Magma Knuckle - Evol-Trigger - Grease Blizzard Knuckle - Killbuspider - Grease Perfect Kingdom
Normal Weapons
Drill Crusher - Hawk Gatlinger - 4Koma Ninpoutou - Kaizoku Hassyar - Fullbottle Buster - Steam Blade - Beat Closer - Twin Breaker
Suit-Equipped Weapons
Muscle Glove - Solstall Wings - Giant Scratcher - Space Ride Arm - Spine Knuckle - Long Range Cleaner - Trash Converter - Gold Lio Gauntlet - Multi Deluge Gun
Collectible Devices
Fullbottles - Sclashjellies
Fullbottle-related Devices
Fullbottle Holder - Pandora Box - Build Phone - Halfbodies
Terminologies
Vortex Finish - Hazard Level - Project Build - Sky Wall - Nebula Gas
Other
Utan - Higetan
Allies
nascita: Misora Isurugi - Soichi Isurugi - Sawa Takigawa - Kazumi Sawatari - Gentoku Himuro
Legend Riders: Eiji Hino - Gentaro Kisaragi - Kouta Kazuraba - Takeru Tenkuji - Emu Hojo - Hiiro Kagami - Taiga Hanaya - Kiriya Kujo - Kuroto Dan - Parado - Poppy Pipopapo - Sougo Tokiwa - Geiz Myokoin - Tsukuyomi - Is - Reika Shindai - Sakura Igarashi - Hana Natsuki
Prime Ministers: Taizan Himuro (Touto) - Yoshiko Tajimi (Hokuto) - Masakuni Mido (Seito)
Namba Heavy Industries Ltd.: Juzaburo Namba - Nariaki Utsumi - Haruhiko Wanibuchi - Guardian
Hell Bro's: Fu Washio - Rai Washio - Yoshikazu Takahashi - Norio Matsui
Aliens: Vernage
Girls Remix: Akiko Narumi - Kanon Fukami - Rinko Daimon - Lovekov
Faust
Gentoku Himuro - Evolto - Nariaki Utsumi - Takumi Katsuragi - Shingo Kuwata - Eita Kawai - Yoshikazu Takahashi - Norio Matsui
Smash
Normal Smash: Fang Smash - Needle Smash - Strong Smash - Burn Smash - Flying Smash - Mirage Smash - Square Smash - Press Smash - Ice Smash - Stretch Smash
Empowered Smash: Strong Smash Hazard - Press Smash Hazard - Stretch Smash Hazard - Flying Smash Hazard
Hard/Hazard Smash: Castle Hard/Hazard Smash - Stag Hard/Hazard Smash - Owl Hard/Hazard Smash
Clone Smash: Press Clone Smash - Stretch Clone Smash - Strong Clone Smash - Flying Clone Smash
Lost Smash: Owl Lost Smash - Stag Lost Smash - Castle Lost Smash - CD Lost Smash - Scissors Lost Smash - Zebra Lost Smash
Foundation X
Kaisers: Kaisei Mogami (World of Build, World of Ex-Aid) - Nebula Bugster
Blood Tribe
Kengo Ino - Ryoka Saiga - Mitsuomi Gobara - Evolto - Killbus - Akaba (imitation) - Aoba (imitation) - Kiba (imitation) - Remocon Bro's (imitation) - Engine Bro's (imitation)
Down Fall
Keiji Uraga - Simon Marcus (Phantom Crusher)
ViewEdit
Icon-zi-o Kamen Rider Zi-O
Kamen Riders
Sougo Tokiwa (Over Quartzer) - Geiz Myokoin (Over Quartzer) - Woz (Black, Over Quartzer, White, Red) - Tsukuyomi (Over Quartzer)
Other Sougo Tokiwa variations
Ohma Zi-O - Sougo of 3 days later - Mirror World - B - C - D - E - F - Robot Sougo - True Sougo
Future Kamen Riders
2022 (Rentaro Kagura) - 2040 (Mondo Douan) - 2121 (Rento Makina) - Kamen Rider Ginga
Rider Time Ryuki Riders
Ishihashi - Tozuka - Kimura - Ishida - Abyss - Odin
Another World Riders
G4 - Fuma - Dark Ghost - Rey - Katsumi Daido - White Woz - Yuuki
Other Riders
G3 Team - Shun Kageyama (Worm)
Movie-exclusive Riders
SOUGO Tokiwa - Kagen - Jogen - Soreo Hiden
Stageshow-exclusive Riders
Hiryu Kakogawa - Red Woz
Gear
Transformation Devices
Ziku-Driver - Ohma Zi-O Driver - Beyondriver - Miraidriver (Shinobi, Hattari, Quiz, Kikai, Ginga) - NeoDecadriver - NeoDiendriver - K-Touch21
Ridewatch-related
Ridewatches - Miridewatches- Ridewatch Holder - Ridewatch Daizer - Faizphone X - Taka Watchroid - Kodama Suika Arms
Weapons
Zikan Girade - Zikan Zax - Ride HeiSaber - Zikan Despear - Saikyo Girade - Zikan Jaclaw - Barlckxs' Sword
Vehicles
Ride Striker - Time Mazine - Dai Mazine
Others/Terminology
Rider Armors - Ohma Advent Calendar - Future Note - Time Finishers
Allies
9 5 DO: Geiz Myokoin - Tsukuyomi - Junichiro Tokiwa
Others
Futaros - Ataru Hisanaga - Shingo Hisanaga - Iroha Kagura - Master Gamano - Sara - Miss Sailor - Oda Nobunaga - Clara Steinbelt - Gyuzo - Pietro - Resistance Captain
Legend Riders
Kamen Rider: Takeshi Hongo
Kuuga: Yusuke Godai
Agito: Shoichi Tsugami - Takahiro Omuro
Ryuki: Shinji Kido - Dark Shinji - Ren Akiyama - Takeshi Asakura - Miyuki Tezuka - Jun Shibaura - Goro Yura
555: Takumi Inui - Masato Kusaka
Blade: Kazuma Kenzaki - Hajime Aikawa
Hibiki: Hitoshi Hidaka - Tomizo Todayama - Kyosuke Kiriya
Kabuto: Soji Tendo - Arata Kagami - So Yaguruma
THE FIRST/THE NEXT: Takeshi Hongo - Hayato Ichimonji - Shiro Kazami
Den-O: Ryotaro Nogami - Yuto Sakurai
Kiva: Wataru Kurenai - Jiro
Decade: Tsukasa Kadoya - Daiki Kaito - Yusuke Onodera - Natsumi Hikari
G: Goro
W: Philip & Shotaro Hidari - Ryu Terui
OOO: Eiji Hino - Michal Minato - Akira Date - Shintaro Goto
Fourze: Gentaro Kisaragi
Wizard: Haruto Soma - Kosuke Nitoh
Gaim: Kouta Kazuraba - Kaito Kumon - Takatora Kureshima
Drive: Shinnosuke Tomari - Go Shijima - Chase - Brain
Ghost: Takeru Tenkuji - Makoto Fukami
Kuuga (manga): Yusuke Godai
Amazons: Haruka Mizusawa - Jin Takayama
Ex-Aid: Emu Hojo - Hiiro Kagami - Kiriya Kujo - Kuroto Dan - Poppy Pipopapo - Masamune Dan
Kamen Sentai Gorider: Aka-Rider - Ao-Rider - Ki-Rider - Momo-Rider - Mido-Rider
Build: Sento Kiryu - Ryuga Banjo - Kazumi Sawatari - Gentoku Himuro - Evolto
Zero-One: Aruto Hiden - Is - Isamu Fuwa - Yua Yaiba - Jin - Horobi
Saber: Touma Kamiyama - Rintaro Shindo - Kento Fukamiya - Ryo Ogami - Ren Akamichi - Tetsuo Daishinji - Yuri - Reika Shindai - Ryoga Shindai
Revice: Sakura Igarashi - Hana Natsuki
Others
Chuta Ohsugi - Daita Kondou - Chikao Nezu - Hina Izumi - Shibuya Hachioji - Narita Kisarazu - Misora Isurugi - Fumen Master - Owner - Momotaros - Urataros - Kintaros - Ryutaros - Eri Ogawa - Daisuke Okubo - Amane Kurihara - Mana Kazaya - Riki - Ramon - Deneb - Krim Steinbelt - Takeshi Kinashi - Shesta - Jun Fukuzoe - Sanzo Yamashita - Narutaki - Akiko Narumi - Sawa Takigawa - Kanon Fukami - Lovekov
Time Jackers
Swartz - Heure - Ora
Movie Exclusive
Tid - Finis
Quartzer
Kamen Riders: SOUGO Tokiwa - Kagen - Jogen - Woz
Other Members: Q-YORI - Q-TOMO - Q-KIMI - Q-YEAH - Q-KENZO - Q-DAICHI
Another Riders
Another Build - Another Ex-Aid - Another Fourze - Another Faiz - Another Wizard - Another OOO - Another Gaim - Another Ghost - Another Double - Another Den-O - Another Kuuga - Another Shinobi - Another Quiz - Another Ryuga - Another Kikai - Another Zi-O (II) - Another Ryuki - Another Blade - Another Agito (troops) - Another Hibiki - Another Kiva - Another Kabuto - Another Drive - Another Decade
Movie-exclusive Another Riders
Another Zero-One - Another 1 - Another Diend
Stageshow-exclusive Another Riders
Another Rider - No Rider - Another Ohma Zi-O
Novel-exclusive Another Riders
Another Ohma Zi-O Trinity - Another Tsukuyomi - Another Geiz - Another Woz
Other Villains
Kasshine - Genin - Humanoise - Worms - Elementary Inves - Trilobite Magia - Battle Magia
Black Satan
Mitsuko Fujimoto - Yuriko Kuroe - Devil Hana
Footsoldiers: Black Satan Soldiers
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