Hiiro Kagami

Hiiro Kagami (鏡 飛彩) is Kamen Rider Brave (仮面ライダーブレイブ), the secondary Rider of Kamen Rider Ex-Aid. He is a surgeon of Seito University Hospital, considered by many to be a genius in his profession, and is the son of Haima Kagami.

History
Hiiro was inspired to become a doctor by his father Haima, the director of Seito University Hospital.

Zero Day
By the age of 19, Hiiro was a medical student at Seito University, and in a relationship with fellow student Saki Momose. Despite Hiiro's cold (and as a result, hurtful) personality, Saki deeply cared for him, going so far as to leave him so that he could prioritize his studies. When Zero Day occurred, Saki became infected by the Bugster virus and created Graphite, a Bugster so powerful that not even Taiga Hanaya (as Proto Snipe) was able to defeat him. By the Hiiro learned of Saki's condition, Graphite had emerged as a complete Bugster. Saki only had enough time to ask that Hiiro become the best doctor in the world before vanishing into data.

Hiiro was strongly affected by Saki's death. Knowing his cold attitude worsened Saki's condition, he blamed Taiga for her death in an attempt to suppress his guilt. He also began eating pastries in between operations (despite his dislike for dessert) as a memento to Saki, who often offered him sweets to refuel.

Saving Satsuki and Mizuki
Sometime in between the Bugster outbreaks, Hiiro saved the lives of Mizuki Mizoguchi and Satsuki Ogimachi, both of whom would assist him as nurses, vowing to be the best aid for the best doctor in the world.

Return to Japan
Hiiro was working for a prestigious hospital in the United States before being called back by his father to handle the new Bugster outbreak. Given the Gamer Driver and the Taddle Quest Gashat, he had just arrived in Japan when a second candidate, pediatrics intern Emu Hojo, had been chosen to join the CR as Kamen Rider Ex-Aid.

Debut as Brave
"Commencing surgery to eliminate the Bugster. Skill Level 1. Separate the Bugster from the patient."

- Brave's phrase after he transforms to Level 1 for the first time.

Hiiro appeared in CR after Emu receives his special Stethoscope. He wasted no time in alienating and belittling Emu, responding to the latter's presence with "No thank you". He arrived with two of his nurses to the location of Rensuke Natori, the next Bugster patient. Transforming into Brave Quest Gamer Level 1, he extracted the Aranbura Bugster from Rensuke. However, before he could continue as Quest Gamer Level 2, Brave and Ex-Aid were attacked by a black Ex-Aid, allowing the Bugster to escape.

Frustrated about being interrupted, he asked Asuna to alert him when the Bugster reappeared. He proceeded to eat cake, seeing that as more important than helping the patient, infuriating Emu. Hiiro found Emu later when Aranbura had taken Rensuke's fiancé Asami hostage. Ignoring Emu's warnings (and calling him a failure of a doctor for letting the well-being of his patient get in the way of fighting the Bugster), Hiiro transformed into Brave Quest Gamer Level 2, and attacked Aranbura using a sword generated in the game map, which later turned into the Gashacon Sword. Brave and Ex-Aid fought the Bugster together, although Brave was the one to deliver the final blow on Aranbura using Taddle Critical Finish (Ex-Aid attempted to finish the Bugster using Mighty Critical Finish).

Nevertheless, the incident would push Emu to stay in the CR, not trusting Hiiro with patients due to his apathetic nature.

The Return of a Nemesis
Hiiro was disgusted to learn that Taiga Hanaya had gotten a Gamer Driver and Bang Bang Shooting Gashat, becoming Kamen Rider Snipe. Finding Snipe and Ex-Aid fighting the Revol Bugster, he transformed into Brave and attacked Snipe in order to take the latter's Gashat & Gamer Driver. The two fought briefly before Ex-Aid reminded them of the bigger priority. However, Revol was able to lower Ex-Aid and Brave's health meters to critical levels. Brave decide to cancel his transformation, deeming it too risky to fight. However, Ex-Aid bravely fought Revol & defeat him (Which actually turned to be a clone) using Mighty Critical Finish. Snipe finished off the real Revol using Bang Bang Critical Finish. After Taiga confiscated Emu's Gashat, Hiiro said that Emu reaped what he had sowed and that that was the consequences if he operates with high risk. Much to his confusion, Emu seemed unbothered, as Yuki had been saved.

Lazer Makes His Appearance
Hiiro and Poppy confronted Kuroto when the latter went to CR to apologize for underestimating Taiga. Hiiro requested one of each kind of Gashat. His request was denied, as only one of each Gashat existed, but he was assured that more Gashats would be ready in a few days. The conversation was interrupted by Emu, who requested Hiiro's help in helping Yoshitaka Nishiwaki, the newest Bugster victim. Hiiro learned of the fourth Rider, coroner Kiriya Kujo, Kamen Rider Lazer. Hiiro observed Lazer and Snipe take on the Bugster after it emerged from Nishiwaki, but joined the fight after the Motors Bugster was separated, primarily to keep Snipe from finishing it off. His duel with Snipe was interrupted by the black Ex-Aid. Both riders were brought to their knees by the black Ex-Aid, only for the intruder to disappear without a trace. Weakened by the ambush, Hiiro could only watch in frustration as Taiga walked away.

Frustrated over having been defeated by Genm twice, Hiiro would confront Dan alone as he visited CR, demanding that he give him a VR simulation. Dan explained to Hiiro that Genm used the Proto Mighty Action X Gashat, stolen on Zero Day, which essentially had the same parameters as Ex-Aid. Knowing this, Hiiro became more flustered and demanded that Dan simulate him right now to which he complied Dan. Simulating the Quest Gamer, Hiiro faced Genm as opposed to a Bugster Virus. Instructed by Dan, Hiiro transformed into Kamen Rider Brave Quest Gamer from Level 1 to Level 2 before activating his Taddle Critical Strike finisher using the Kimewaza Slot Holder. Though clearing the simulation, Hiiro was not satisfied since he knew that the real Genm was not that weak. To evade further questions, Dan decides to leave for checking the new Gashats. When Hiiro checks the screen, it shows that Dan had set the difficulty level to Easy, which confuses Hiiro.

Encountering Graphite for the First Time
Sometime later, Kuroto contacted Hiiro and Poppy to inform them that the four new Gashats were stolen, sending them security footage of what seemed to be a man breaking into Genm Corp. Within seconds of this announcement, Emu called Poppy about another gaming disease patient. Upon arrival, Hiiro and Asuna recognized the "victim" as the man from the security fotoage. Hiiro demanded the Gashats from the patient in exchange for his help, leading to an argument with Emu and eventually the thief escaping the premises.

While Hiiro and Emu lost the thief, they were quickly confronted by a Collabos Bugster. Much to their shock, not only was the Bugster separate from its host, but it had been installed with the Gekitotsu Robots Gashat. Emu and Hiiro transformed to Ex-Aid and Brave, only to be overwhelmed by the Bugster's sheer strength. To make matters worse, the fight was interrupted by the black Ex-Aid, who brought the other Riders to their knees before escaping with the Bugster. The only form of clarity was from the sudden appearance of Kiriya, who claimed that he had seen the black Ex-Aid's true identity: the Gashat thief. Kuroto arrived in CR sometime later to discuss the game plan. Hiiro lost his temper with Emu after the latter pleaded to try and help the thief. Reminding Emu that they were dealing with a criminal, he reprimanded Emu for getting involved with his patients, citing Taiga taking the Migthy Action X Gashat as an example. He claims that he's sick with Emu idealism, which the latter claims that Hiiro isn't a real doctor before fleeing away.

Hiiro later appeared at Robots Collabos location along with Emu and Asuna. Taiga, Kiriya and Genm Sports Action Gamer Level 3 also appeared not too long after. Hiiro, Taiga and Kiriya trasnformed into Brave Quest Gamer Level 2, Snipe Shooting Gamer Level 2 and Lazer Bike Gamer Level 1 to fight Genm and Collabos. However, Genm and Collabos manage to defeat them easily with the help of the thief, which latter shown to be Graphite all along. Hiiro cancel his transformation, stating that this battle is too risky to handle. Hiiro later witness Emu, defeating Robots Collabos and Genm using Mighty Critical Finish and Gekitotsu Critical Strike respectively.

Become Beat Quest Gamer Level 3, Second confrontation with Graphite
Hiiro appears in front of Kiyosora College of Music, muttering Graphite's name and thinking about Taiga's reaction against Graphite before noticing Emu and Asuna, who were attempting to find a patient. He later appeared when the patient showing symptoms of Game disease. Hiiro suggests to let the disease take over first so that they can operate her easily. After the patient turned into Bugster Union, Hiiro transformed into Brave Quest Gamer Level 1 and quickly extract the girl from the bugster, which is later shown to be Beat Collabos. However, Graphite suddenly appeared and claims that he's infect the girl with two game viruses (Gekitotsu Robots and DoReMiFa Beat). This prompts Emu to join the battle as Ex-Aid Action Gamer Level 1. He and Ex-Aid then confront Beat Collabos. The Bugster then attack Ex-Aid and Brave in similar manner as Rhythm game. Although Ex-Aid manage to get a Perfect, Brave get a Miss and damaged. Graphite soon transformed too and join the fray, although soon interrupted as Taiga appeared, already transformed into Snipe Shooting Gamer Level 2. Ex-Aid then directly transformed into Robot Action Gamer Level 3 and Brave transformed into Quest Gamer Level 2. Graphite attack the trio using Gekidoryuga, heavily damaged Brave and Snipe despite their attempt to counter it. Their lives somehow saved by Genm Sports Action Gamer Level 3, ordering Graphite to retreat.

After the Battle, Hiiro confronts Taiga. He ask if Graphite was the one Taiga failed to kill 5 years ago. Taiga states that it's not Hiiro's own business anyway. This frustrates Hiiro as he chases Taiga and demands the answer. Taiga mockingly said that he's been forgetting things lately. Hiiro then tries to punch Taiga, but Taiga easily blocks it using his right hand. Hiiro states that he could have saved a girl called Saki back then. Their fight was stopped by Emu, and Taiga challenged Hiiro to defeat Graphite if he can and reveals that Graphite is indeed the one who kill Saki before leaving. Hiiro then clenched his fist in rage.

Hiiro later appears at Beat Collabos location. This time, however, he aims for Graphite [who was at scene as well]. While Emu transformed into Ex-Aid Robot Action Gamer Level 3 fight the Beat Collabos and Bugster minions, Hiiro transformed into Brave Quest Gamer Level 2 and attacked Graphite, but was easily defeated. Graphite provoked Brave by claiming that Saki had already given up on him, causing him to snap. Brave cast his Gashacon Sword away and attacked Graphite again, but was once again easily defeated. Just before Graphite could finish Brave by using Gekidoryuga, Ex-Aid saved him by taking the hit directly, cancelling Emu's transformation. Emu pleaded to Brave that Saki kept her Buster virus a secret since she didn't want to bother his studying. Reminiscing Saki's last words, Brave realizes that Emu was telling the truth. This ignites Brave's spirit as he becomes determined to finish Graphite off.

Brave uses Stage Select to enter a forest-like environment, and using Taddle Critical Finish (Ice ver.), Brave manages to defeat Beat Collabos, acquiring the DoReMiFa Beat Gashat. Using the newly acquired Gashat, he transforms into Beat Quest Gamer Level 3 and uses rhythm-based attacks to fend Graphite off. Using DoReMiFa Critical Finish, Brave quickly manages to defeat Graphite; however, Graphite manages to flee, cursing Hiiro in the process.

Second confrontation with Genm
Hiiro was seen along with Haima at CR. After scolding his dad because he talked too much, Hiiro decide to operate the patient. He quickly notices Emu and order him to stand aside, which the latter refuse as he can't let Hiiro to do things his way. Nevertheless, they transformed into Ex-Aid Action Gamer Level 1 and Brave Quest Gamer Level 1 respectively, and also successfully extract the bugsters (Chambara & Combat Collabos) from the patient. However, sudden intervention from Genm Sports Action Gamer Level 3 allow the bugsters to successfully flee, even after Ex-Aid and Brave transformed into their Level 3 forms.

Back at CR, Kiriya appeared in CR after Haima carelessly drop his folder in front of the CR Door. However, all of them (Except Haima since the latter is still obvious about Kiriya) starts to not believe him. Hiiro asks why Kiriya lied to them by saying that Genm is Graphite. The latter said that it's to protect them from Harsh Truth. Unfortunately for Kiriya, they all goes to their own business. Hiiro then asks his dad to do some research regarding of Kiriya past.

Hiiro later appeared again at Chambara Collabos location, warned Emu to not trust Kiriya before transforming into Brave Quest Gamer Level 2. However, Genm Action Gamer Level 2 appeared and fight with Brave. He later saw that Genm is Parado. He warned Emu that Kiriya is a complete liar, there is no truth in his words before he left.

The Rematch with Taiga
At night, Haima said to Hiiro that Taiga had abducted the Bugster that infects Yoshio. Hiiro coldly scorns that Taiga had lost all his morals, ever since Taiga failed to save Saki back on Zero Day, and that her death means nothing to him. Hiiro decided to accept Taiga's challenge and swore to claim Taiga's Gashat and Gamer Driver, ignoring his father's warnings.

The Dr. Pac-Man Incident
With his fellow doctors and Kamen Rider Ghost's allies, Brave fought the Next Genome Institute.

Assuming the Famista Gamer
"It's game, set for you."

- Brave's proclamation in Famista Quest Gamer Level 3 before a finisher

Hiiro along with Taiga confronts the revived "Dr. Pac-Man" who had taken Emu away from Genm, both vowing to defeat him again. When the three doctors are met by Genm and the three copy Kamen Riders that he had summoned, "Dr. Pac-Man" provides the trio with the Bandai Namco Gashats, with Hiiro receiving the Famista Gashat. Transforming, Brave Quest Gamer Level 2 faces Kamen Rider Double in a brief skirmish before using his new Gashat to assume Famista Quest Gamer, generating a Game Area in which he finds himself as a pitcher facing off against the batter Kamen Rider OOO and his baseball team of Bugster Virus. Ultimately prevailing in the match, Brave performs Famista's Critical Strike to defeat the opponent Kamen Rider.

Alongside Snipe, Brave soon caught up with Ex-Aid as he recovered the Ganbarizing Gashat, both intending to claim it for themselves only to be eluded by "Dr. Pac-Man" who snatched the Gashat as quickly as he arrived, adding it to his quartet of Bandai Namco Gashats. It was at this point that Hiiro realized that the three of them had been used as guinea pigs, a deduction immediately confirmed when "Dr. Pac-Man" was joined by the black Ex-Aid who, using the Ganbarizing Gashat to bestow upon himself the power of the first seventeen Heisei Riders, took the three doctor Riders by shock as he was able to defeat them with a single Critical Strike Rider Kick before taking his leave.

First Time Assuming Fantasy Gamer Level 50
"I won't let anyone take control of me. The strong resolve to accomplish a mission...is the sign of a doctor entrusted with people's lives! I am.. The world's best...Doctor!"

- Brave overcoming Taddle Fantasy's dark magic. With Genius Gamer M dominant of Emu's body and Hiiro left with no Gashats on him, he confiscated and tried to use the Mighty Action X Gashat, but Emu managed to steal it back.

After witnessing Genm activate Taddle Fantasy to summon Fantasy Gamer, Genm commanded it to attack Hiiro, after he stole the Mighty Action X Gashat, while he tried to dodge its attacks.

The Gashat Gear Dual β fell into Hiiro's hands thanks to his plan to get the Fantasy Gamer confused via the Confusion Energy Item it tried flying into.

After assuming Fantasy Gamer Level 50, Brave was overwhelmed by the power of the Fantasy Gamer, corrupting him and summoning Bugster Viruses to attack Ex-Aid and capture Asuna, but not before he regains his control over the said form and used the Bugster Viruses he summoned to attack Genm and used his form's new powers to flail Gatton Bugster aroung the Game Area but not before Genm futilely used a conjunction of Taddle-Drago Knight Critical Finish while Brave finished it with a Taddle Critical Slash, knocking Genm out which enabled Brave to recover both the Drago Knight Hunter Z and Taddle Quest Gashats, at the cost of suffering pain in his chest.

Confrontation with Takeshi Asakura
"My scalpel is justice!"

- Brave's proclamation in Level 4 before battle

Hiiro's talent would be recognized by the world in February as he won the Doctor of the Year award, which would be acknowledged as he flew to New York to receive it. On the 20th, where he was faced with a conference, examination and a surgery, he was given the plane ticket by Mizuki and Satsuki, whom he scolded when they admitted that a PET scan still needed to be rexamined, citing that the smallest margin of error could cost a patient their life.

Despite an assault committed on Satsuki that night, Hiiro was prepared to leave on the following day, noting that the bones in her arms were shattered but nothing worse beyond that. Hiiro's departure from CR was covered by Mizuki who assured Emu and Poppy that she would take care of things, later explaining to Poppy that she and Satsuki took their work under Hiiro in stride as they aspired to be the best nurses to support the world's best surgeon. Ultimately, however, Hiiro chose to return while on his way to the airport. Finding an unconscious and savagely beaten Emu, Hiiro recovered the Night of Safari Gashat that had been left on his person before rescuing Mizuki as he confronted the perpatrator, Takeshi Asakura. Initially transforming to Quest Gamer Level 2, Brave engaged Asakura's Beast Rider Squad, defeating Kamen Riders Tiger and Dark Kiva before being beaten back by Asakura himself as Kamen Rider Ouja. It was at this point that Brave Level 4 Safari Gamer, which allowed him to defeat Ouja despite his use of Sasword and Beast as human shields. As Asakura passed on again, he told Hiiro to continue to fight lest his life would not be worth living only for Hiiro to note that he was not the best authority on life advice. Following this, Hiiro, having lost Night of Safari on the way, proceeded to personally tend to the wounds sustained by Mizuki and Satsuki, who would thank him for helping them while canceling his trip to America, noting it as the second time he had saved their lives. Hiiro, however, preserved his cold demeanor as he justified his sacrifice by assuring that he would have many other opportunities to be acknowledged in the future.

Fall of Kuroto Dan
Hiiro assumed Brave Fantasy Gamer Level 50 again despite Taiga warning him that the Gashat is too dangerous, to the point he calls Taiga existence a "no thank you", to fight Vernier Bugster Level 30 and Para-DX Puzzle Gamer Level 50. Brave managed to negate the effects of Para-DX's Stretch Energy Items despite Para-DX getting two Recovery Energy Items to assume Fighter Gamer Level 50. Both Riders appear to be evenly matched, but Brave suffers another pain in the chest while Para-DX barely beats him, hesitating to finish off an injured opponent. Brave eventually gets knocked out of his transformation, leaving behind an unconscious Hiiro.

Hiiro wakes up at Taiga's clinic and is greeted by Nico, who states that the Gashat is "too much for him", as Taiga snatches it from him. Taiga explains that one half of the Gashat is Hiiro's Taddle Fantasy while its other half is Bang Bang Simulations. Hiiro still feels bitter that despite Taiga saving him, he still feels ungrateful.

Chou Super Hero Taisen
""So you are the real me?" "And you are the game me?""

- The two Hiiro confront each other

When Poppy Pipopapo was pursued by the, Hiiro engaged them alongside Emu and Taiga, briefly fighting with and  before the fight was interrupted by the Galaxian ships.

Hiiro would come face to face with a doppelganger of himself from the Game World, who assumed the Legacy Gamer Level 50 to become Kamen Rider True Brave. Engaging him with his own Fantasy Gamer, Hiiro ultimately bested his mirror self who then relinquished to him a cache of items which would allow him to conclude the Chou Shocker Taisen in which he would fight with various Kamen Riders and against the Shocker army of the Game World led by Shocker Leader III. These items were the Galaxian Gashat, whose Galaxian Gamer he wielded in battle, the Chou Super Hero Cards, which he used to summon Riders and Rangers from the Game World to assist, and an Energy Item which he provided to Ex-Aid Maximum Gamer, enlarging him and allowing him to join the Kyurangers in vanquishing the Oogumo Great Leader.

The Bugster Horde
When Kuroto Dan's plot to revive in the Game World caused an army of Bugsters to perpetually revive and emerge into the real world, Brave and Snipe shared the Gashat Gear Dual β as they fought back the endless horde while Emu was sent from CR to the Game World to stop Dan. Brave assumed his Fantasy Gamer first before being beaten back, leaving Snipe to endure alone with the Simulation Gamer before rejoining him with the Hunter Gamer, at which point the horde ultimately dissipated in an instant as the destruction of the Game World brought about by Kazuma Kenzaki thwarted Dan's ambition to revive.

Betraying CR
The plans of CR and the Bugster were derailed by the arrival of Masamune Dan, who became Kamen Rider Cronus and defeated both sides with ease. In the next encounter, Cronus whisked Brave away, offering him a place as his right-hand man. Hiiro initially refused, and transformed to Brave Level 50 in a fruitless attempt to fight Cronus. However, once he was subdued, Brave learned that Cronus was the thief of the Proto Gashats, forcing him to cooperate in order to save Saki.

Return to the Side of Good
"You're the cancer of this world and I will eliminate you!"

- Hiiro to Masamune

Hiiro panicked, running away from the dying Taiga rather than help. Later that night, Haima called Hiiro in desperation: Taiga's heart had suffered significant damage, presenting a surgery only Hiiro could successfully perform. Masamune overheard the call, and gave Hiiro a proposition: Hiiro would go to the operation and sabotage it, or Saki's data would be erased. Hiiro went to do the operation, making Emu and the others glad but not for long after Kiriya came to tell the news that Hiiro might kill Taiga because of the blackmail. Hearing that, Emu went alone and trusted Hiiro for the operation so Emu can save Saki while Hiiro can save Taiga. But Emu's effort went to nothing and Hiiro came to Masamune, revealing that he had saved Taiga, unable to revoke his integrity as a doctor. Masamune subsequently deleted Saki's data. In retaliation, Emu and Hiiro transformed and fought Cronus, which ended with Masamune retreating. After Emu left at Hiiro's request, Hiiro broke down, weeping bitterly as he accepted that Saki was gone for good.

Personality
Hiiro is intelligent and capable, yet cold and arrogant. Hiiro firmly opposes personal involvement with his patients, believing that personal feelings will interfere with his performance. He initially looks down on Emu, deeming him unworthy to work in CR due to his inexperience and conflicting ideals, although he warms up to the intern over time. He is the only one to question Kuroto's somewhat dubious behavior, showing some level of perceptiveness. Hiiro has a liking for desserts, mainly cakes or pies, which he claims is to increase his energy in between operations. This quirk is later revealed as a legacy of his late girlfriend, who always gave him desserts when he studied. While remembering Saki, Hiiro begins to question if revenge was really worth it, showing he had his doubts about vengeance instead of being utterly consumed by it like Taiga was.

Hiiro treats his fighting with Bugsters as an operation. He has a habitual quirk of raising his hands in the position most surgeons use when they are about to operate on a patient, and refers to the Gashacon Sword as his "scalpel". He often also speaks in a mannerism akin to his civilian job after transforming. (Ex. "Commencing Bugster removal operation"). He will cancel his transformation if he deems the situation too risky (primarily when his Rider Gauge is almost depleted). Whenever he encounters someone he doesn't like or doesn't feel belongs in the situation, he will respond to their presence by saying "no thank you".

Due to Hiiro referring to anything that can be used for cutting as a scalpel, his habit with words will sometimes be used with people that may not understand what he means. This was shown when eating at a public cafe, he asked for a scalpel instead of a knife. Though he quickly corrected himself after realizing his mistake.

Somehow upon learning the extent of Kamen Rider Chronicle in regards of reviving those who died of the Bugster infection, including Saki; Hiiro is curious about this to the point he continued to think about bringing Saki back to him, which in turn was his fatal flaw. Masamune Dan takes advantage of this and blackmails the surgeon into working for him, which results in him having an internal conflict between his profession as a doctor and his love for Saki. This ended with him committing to his profession and saving people as his first priority, but he still regretted for being unable to save Saki so much that he cried.

Abilities

 * Genius Surgeon: Although he is only 24, Hiiro is a skilled surgeon, considered by many to be a genius in his field. He specializes in heart surgery, although he is capable of performing other operations.
 * Swordsmanship: Hiiro is shown to be capable in using swords, comparing them to scalpels. This can be seen when he decapitated a Giant Bugster using a generic sword. This also shown as when he sliced a cream puff in episode 6, he didn't bring the knife in contact with the cream puff, but still equally cut into 4 pieces.
 * Acquired Game Disease Immunity: As a result of the standard compatibility surgery for CR candidates, Hiiro Kagami is immune to the Game Disease, and able to transform into a Kamen Rider to fight the Bugsters.

Devices

 * Gamer Driver - Transformation device.
 * Rider Gashat - Transformation trinkets.
 * Gashat Gear Dual β - Level 50 transformation trinket, initially shared with Snipe before the creation of the second.
 * Kimewaza Slot Holder - Carrier strap for the Rider Gashats.
 * Beat Gamer - Brave's Level 3 support robot summoned by the DoReMiFa Beat Gashat.
 * Safari Gamer - Brave's Level 4 support robot summoned by the Night of Safari Gashat.
 * Hunter Gamer - Brave's Level 5 support robot summoned by the Drago Knight Hunter Z Gashat.
 * Fantasy Gamer - Brave's Level 50] support robot summoned by the Taddle Fantasy side of the Gashat Gear Dual β.
 * Legacy Gamer - Brave's Level 100 support robot summoned by the Taddle Legacy Gashat.
 * Famista Gamer - Brave's support robot summoned by the Famista Gashat.

Weapons

 * Unnamed generic sword - Initial blade weapon, destroyed and replaced after first usage.
 * Gashacon Sword - Primary blade weapon.
 * Reversal Shield - Personal shield.
 * DoReMiFa Turntable and Watts Up Sounder - Beat Quest Gamer Level 3's personal weapons.
 * Dragon Blade - Hunter Quest Gamer Level 5 Dragon Blade's personal weapon.
 * Dragon Fang and Dragon Gun - Hunter Quest Gamer Level 5 Full Dragon's personal weapons.

Relationship

 * CR:
 * Emu Hojo: Although they often partnered during their battle with Bugsters, Hiiro sees Emu as nothing but an Intern (研修医) and also 'No Thank You', in return Emu didn't really like him either, going so far to say that Hiiro isn't a real doctor twice. Hiiro has slowly warmed up to him, showing concern when he learned that Emu was infected with the Bugster virus and even saying that he "wanted to cure the patient right in front of him" in regards to Emu. This got extended to when Emu wakes up as "Genius Gamer M", Hiiro is greatly angered and choked on Emu so he can snap out of his delusions. Later on, he recants what he thought about Emu before, saying he was very harsh on him before. When Emu first know that Hiiro defect CR and become Masamune right-hand man, Emu acknowledged that Hiiro was blackmailed, rather than defecting on his own free will to get Saki back. Emu also believe that Hiiro will return to CR eventually, and when Hiiro ask Emu to fight alongside with him once more, Emu complies.
 * Asuna Karino/Poppy Pipopapo: Hiiro's usually apathetic towards her but in return, she develops some fear toward Hiiro. She even obeys several orders from him such as when he asked Poppy to use her knife to cut an apple pie.
 * Haima Kagami: Despite being a family, Hiiro acts cold toward his father, once scolding him to not talk too much, but Haima always does his best to help him. Haima was willing to risk his life and his title as Director by becoming a Ride-Player and being infected with the Lovelica Game Disease strain in order to clear Kamen Rider Chronicle and revive Saki Momose. When Haima's identity is revealed, Hiiro tells the others to retreat for his father's safety. When Asuna comments that Haima can be serious at times, Hiiro confirms her statement and reveals that his father is his motivation to become a doctor. Upon hearing Kiriya info about Masamune last order to Hiiro (Which is to sabotage his operation to reclaim Saki), Haima believed that his son will never do things that lowly, which proved by Hiiro himself.
 * Taiga Hanaya: Hiiro holds a grudge against him, since Taiga is responsible for letting his late girlfriend die from Graphite's infection. Taiga, in return also hates Hiiro, often provoking him if necessary. His resentment of Taiga's actions were enough for Hiiro to claim that Taiga was "not qualified to be a Kamen Rider". When Taiga takes the Gashat Gear Dual β from Hiiro after suffering the strain of his own Level 50 form, Taiga reminds Hiiro that he might end up becoming the broken and bitter man he is now if Hiiro is not careful with his pragmatic methods, and also tend his wounds Hiiro later pay his debt by choosing to save Taiga after he get beaten up by Graphite, instead of killing him. They both finally rekindle their comradeship and no longer hold grudge to each other.
 * Kiriya Kujo: Kiriya seems to hold no ill feelings toward Hiiro, but Hiiro distrusts him due to his liar nature, right up until Kuroto revealing himself to be Genm, which Kiriya had previously warned about. Later on, some time after Kiriya's death, as Hiiro found the data that Kiriya had left behind, he finally realized that Kiriya's true intentions were to find a way to stop the Bugster threat once and for all. Coincidentally, after Kiriya's revival as a Bugster, both of them now become Masamune Dan underlings.
 * Kuroto Dan: Although somehow dubious from Kuroto's behavior, Hiiro seems to respect him, unaware that Kuroto is actually Genm until Kuroto revealed himself as Genm, whereas both Hiiro and the three other Doctor Riders were too late to notice and stop Kuroto's first plans, such as his manipulation of the Riders and the creation of death data from the Dangerous Zombie Gashat through clearing 10 produced Gashat games from succeeding. Even worst part, ones Emu found out full infos in regarding of his status on how he became a progenitor to Bugster Viruses and the viruses' further origin in Y2K from Kuroto's father Masamune, Hiiro and the detective Heiji Uesugi found out that Kuroto was the one who infected Heiji's son and Saki as the result of one of the Bugsters like Graphite completely manifest the infection progress and the hosts disappeared into nothingness.
 * Civilians:
 * Saki Momose: Saki deeply loves Hiiro, although Hiiro didn't reciprocate her feelings in order for him to continue studying. Saki's death is the one thing that motivates Hiiro to become a Kamen Rider. Hiiro also said that he'll do anything to see her one more time. This is also the reason why Hiiro decides to betray his fellow teammates in CR, as Masamune Dan promises to revive Saki (which he actually does, albeit without her consciousness), implicating that Hiiro actually really loves her in return. At first, Hiiro was determined to bring her back at all cost. But, after Taiga was beaten up by Graphite and had a severe Hemorrhaging, Hiiro remembered Saki last word and decide to Save Taiga instead of killing him. Saki data then get deleted, and after Hiiro, along with Emu defeat Masamune in Legacy and Muteki Gamer respectively, Hiiro mourn her loss amidst the rain.
 * Mizuki Mizoguchi and Satsuki Ogimachi: Both of them was saved by Hiiro several years ago, and thus they both willingly become Hiiro personal Nurses to aid him to become the best doctor in the world. Hiiro often acts cold to them, but they already understand and put their faith on him. Hiiro also saved them when they both are badly assaulted by Takeshi Asakura, although he refused to admit it.
 * Bugsters:
 * Graphite: Hiiro holds a grudge against Graphite, since Graphite was born from his late girlfriend. After receiving Emu's plea, Hiiro holds a determination to finish Graphite off. Graphite in return sees Hiiro as nothing before, but after his defeat, he swore to destroy him using his own hands. Hiiro finally gets to avenge Saki with the help of the other Doctor Riders, but refuses to admit it.
 * Genm Corp:
 * Masamune Dan: Masamune takes interest in Hiiro after revealing his identity as Cronus. He successfully manages to blackmail Hiiro by showing him the Proto Drago Knight Hunter Z Gashat, which contains the data of Hiiro's late girlfriend, Saki. Later, Hiiro betrays CR and becomes Masamune's right hand man. Hiiro feels uneasy around Masamune even after he revives Saki (albeit without her consciousness). He later becomes agitated by Masamume, as the latter confiscates his Gashat Gear Dual β without explanation. It is then revealed that Masamune used the data of Taddle Fantasy to create the Taddle Legacy Gashat. Upon Masamune first defeat on Ex-Aid Muteki Gamer, Masamune unleashed his Anger to Hiiro and ordered him to Kill Parado in order to make Emu unable to transform, or Saki data'll be permanently erased. Although this make Hiiro fortify his resolve and able him to use Taddle Legacy, this starts to drive a wedge in their partnership. Later, as Taiga was beaten up by Graphite and had severe hemorrhaging, Masamune order him to sabotage Taiga's operation. But, remembering Saki's last words, Hiiro saves him instead. Thus, their partnership ends after Masamune deletes Saki's data. Hiiro then said that Masamune is the world's cancer, and he will end him once and for all.

Portrayal

 * Hiiro Kagami is portrayed by Toshiki Seto (瀬戸 利樹). As Kamen Rider Brave, his suit actor is Jiro Uchikawa (内川 仁朗) in Level 1 and Jun Watanabe (渡辺 淳) in Level 2.