This is a partial character sheet for Kamen Rider Zero-One. Visit here for the main character index. Subjective trope and audience reactions should go on the YMMV page.
Hiden Intelligence / Hiden Manufacturing
A tech company responsible for the creation of the HumaGears, as well as the Zero-One Driver. After the end of the Workplace Competition arc, it's replaced as the main company of the series by Aruto's own company, the much smaller Hiden Manufacturing. When Hiden Manufacturing is destroyed in Episode 40, Hiden Intelligence takes the main stage once again as the focus company.
- See his page for more details.
Portrayed by: Kazuya Kojima
- Always Second Best: Despite having been the Vice-President of Hiden Intelligence for quite a while, and being an excellent staff member, Fukuzoe has a Inferiority Superiority Complex due to being passed over. This is made apparent when he learns that Aruto, Korenosuke's grandson, is named the new CEO of Hiden Intelligence instead of him. He is not happy about this whatsoever and largely believes Aruto got it through nepotism.
- Character Development: It's subtle, but Jun has changed since the show began. Originally, he was a Green-Eyed Monster who coveted the position of President and disliked Aruto both because he knew nothing about the inner workings of the business world and how he became President. His stance has lessened since the end of the MetsubouJinrai.NET Arc, agreeing with Sanzo that while Aruto is not fit to be a businessman, he did work to save the company by becoming Zero-One. When Hiden Intelligence loses the Workplace Competition and Hiden is bought by ZAIA, he decides to stay at the company and preserve his position as Vice-President in spite of his dislike towards Gai. By that point, he seems to be less concerned about becoming president and more focused towards doing his best to contribute to his company. It's to the point where he actually goes to Aruto for help in taking Gai down and actually encourages Aruto to face Ark Zero because of his beliefs in AI.
- Defrosting Ice King: Showing signs of this. It's telling that his reaction to Aruto's losing the Workplace Competition and subsequent firing is not victorious taunting, but relative silence and inquiry as to the boy's future goals. After Aruto was defeated by Ark-Zero, he shows even more of this, by showing genuine concern for the young man.
- Demoted to Extra: He and his group lose prominence after his failed bid to out Aruto as president, and their screentime has been minimal as of the end of the MetsubouJinrai.NET arc and during the ZAIA arc.
- Everyone Has Standards: He may have been a jerk to Aruto, but he's repeatedly shown chafing under Gai Amatsu's presidency. When Gai describes his plan to deliberately drive ZAIASpec wearers berserk in order to help sell the RaidRiser, it's more than Jun can stand and he goes to Hiden Manufacturing to ask Aruto for help exposing all of Gai's criminal misdeeds.
- Evil Laugh: More "scheming" than evil, but he's prone to laughing to himself while plotting Aruto's removal from the company.
- Green-Eyed Monster: He believed that he was going to be the new President of Hiden Intelligence, but he's been passed over in favor of Aruto, the President's grandson. He openly hopes Aruto fails so he can replace him. In #2, he flat-out tells Aruto to step down. His jealousy has gotten to the point where he is plotting to oust Aruto from the company with his own group of subordinates.
- Heads I Win, Tails You Lose: While he greatly covets the presidential chair, he recognises that as the company's Vice-President, he still benefits if Aruto does a good job keeping Hiden Intelligence in the black.
- Heel Realization: Although he still wants Aruto's position, he is convinced by Sanzo that Aruto remain as president because he saved their company as Zero-One.
- Hidden Depths:
- His complex and hostility towards Aruto aside, he is a longtime and competent worker at Hiden Intelligence, and is genuinely proud of the success of the company. It just doesn't show well since it's filtered through his gigantic ego, though the example under Honor Before Reason is the clearest example of this.
- He is implied to have deeper knowledge behind the Daybreak Incident due to being a longtime worker of Hiden Intelligence, however he refuses to say anything about it in order to protect the company.
- The movie Kamen Rider Reiwa First Generation implies that he cares a lot more about Korenosuke Hiden, the previous president, than he lets on since the first thing he does once Korenosuke gets killed by Another Zero-One is try to run to his body while crying out his name only to be stopped by Sanzo.
- Honor Before Reason: After Hiden Intelligence is bought out by ZAIA Enterprise, Jun chooses to remain as Vice-President of the company. As much as he despises Gai Amatsu, his loyalty to the company remains regardless of whose hands it is in now.
- It's All About Me: When he thought he was going to be the new president he wasted no time at all replacing Korenosuke's framed painting with an even bigger framed painting of himself the day of Korenosuke's funeral. Similarly, when Aruto crashes his press conference trying to cover the Magia incident up with evidence of MetsubouJinrai.NET's existence and involvement in the berserk HumaGear attacks he looks like he's going to clench his teeth hard enough to break them at Aruto showing him up and proving to be a better public speaker than him when he's not cracking jokes.
- Jerkass Has a Point:
- Is completely correct when he says Aruto only got the position of CEO through Nepotism.
- When questioned about the Daybreak Town Incident, he claims he doesn't recall anything. When Aruto calls him out believing he has something to hide, all Jun says is that protecting the company sometimes means one must keep the truth in the shadows.
- Calls out Aruto for his biased opinion towards Choichiro Ishizumi after the former claims that lazy people like Ishizumi should not be using HumaGears as slaves, nor as money-making tools.
- Say what you will about his demeanor, but Jun isn't wrong when he attempts to have the HumaGear in the hospital shut down before they can become Magia. Granted, he'd be leaving a lot of patients including Fuwa in critical condition, if not leaving them to die, but it's either do that and deal with some casualties or don't and risk countless more.
- Jerk with a Heart of Gold: Played with, on multiple occasions.
- While still trying to gun for Aruto's seat as President of Hiden Intelligence, he admits in Episode 16, albeit reluctantly, that he knows to give the young President credit for his actions as Zero-One where credit is due.
- His heart of gold really shines in Episode 27 where he shows concern for Sanzo and Shesta's safety, desperately trying to keep them awake before being rescued.
- Even despite his distaste for him, he actually shows genuine concern for Aruto in episode 29 when the latter decides to leave Hiden Intelligence for good, questioning Aruto on what will he do next.
- Gets Aruto back up on his feet after he is defeated by Ark-Zero, and is rendered a terrified mess, reminding him of what he's fighting for.
- Kick Them While They Are Down:
- After Is is damaged in battle in Episode 15, Jun tells Aruto that had he been promoted to President instead of Aruto, none of the show's events would have happened. Afterwards, he goes off to schedule a board meeting to request Aruto's removal as President.
- Does this again, this time with Gai, after Shesta dug up 1,843 complaints made against Gai for his actions and behavior, and declares his intent to initiate a hostile takeover to remove him from his role as President of Hiden. Unlike the previous example, this is portrayed in a much more positive light due to the fact that Gai is a colossal dick on top of being a fairly incompetent president.
- Loyal to the Position: He has to be loyal in his position so that he doesn't let the company collapse. This means that he'll have to appeal to Gai's pleasure despite knowing that he despises Gai.
- Obstructive Bureaucrat: He seems less worried about letting HumaGears live up to their original purpose of improving people's lives like Korenosuke and Aruto and more concerned with keeping Magia attacks covered up so they don't affect Hiden Intelligence's bottom line.
- Professional Butt-Kisser: Defied Trope. While he is loyal to the company more so than who's running it, he has his limits—Gai attempting to engineer a berserk ZAIA Spec incident to boost their Raidriser sales is the last straw.
- Rousing Speech: After Aruto gets defeated by Ark-Zero and starts fearing how dangerous a rampaging HumaGear can be, Jun points out that he of all people should have the utmost faith in HumaGears — his grandfather invented them, and his father was one of them — and that they need someone who will stand up for them even when nobody else will.
- Wrong Genre Savvy: He seems to think he's in a business drama and not a tokusatsu series. Despite having knowledge of Zero-One, not even once he ever thought or mentioned the possibility that he has to also fight as Zero-One if he took the CEO role from Aruto.
Portrayed by: Arata Saeki
- Everyone Has Standards: A bit more level-headed than Jun, and just as disgusted with Gai's mad schemes. He's also the one who saved one last Humagear in episode 37.
- Evil Laugh: Like Jun, more "scheming" than evil. He usually joins in on the Vice-President's because he's a suck up.
- Heel Realization: He actually congratulates Aruto for helping save the company against the villains and even gives him a round of applause.
- Loyal to the Position: Along with Jun, Sanzo must also appeal to Gai's pleasure even though he agrees with Jun that Gai is despicable.
- Please Don't Leave Me: Or more accurately, "Please don't leave the company." Following the conclusion of the Workplace Competition, Sanzo begs Aruto to reconsider leaving Hiden Intelligence, pointing out that while executive members do resign from the company, it is only by their choice and can optionally work in a lower-ranking position. While touched, Aruto ultimately leaves the company.
- Satellite Character: Where Jun goes, he follows. Episode 5 is the first time we see him by himself. He does have a positive belief in HumaGears as seen in Episode 27, where he believes that 119 Nosuke will save him and everyone in the burning building.
- Yes-Man: Jun's. He's constantly sucking up to the Vice-President's schemes. Subverted satisfyingly when not even he votes yes in Jun's attempt to oust Aruto as President. And subverted again with Gai—he's as disgusted as Jun when he learns of Gai's new scheme to boost Raidriser sales.
Portrayed by: Tokuma Nishioka
- Crazy-Prepared: According to his will, he knew the Robot War was about to happen soon, so Satellite Zea was already programmed to fabricate the Zero-One Driver and give Is her orders. This implies he deliberately chose Aruto as the person to become 'Zero-One specifically' and not just the heir to the company. Many of Aruto's advantages come from Korenosuke anticipating his situation and preparing an appropriate response, but eventually Reality Ensues and this supply of preparations runs dry, forcing Aruto to stop relying on his grandfather's help right when he needs it most.
- Exact Words: In his will, he states that only the company president may be allowed to use the Zero-One Driver. He never said it had to be the President of Hiden Intelligence. Is takes full advantage of this loophole since Korenosuke patented all technology relating to Zero-One and HumaGear under the Hiden family name and has Zea register them under Aruto's new company, HIDEN Manufacturing. In turn, Aruto is allowed to continue using the Zero-One Driver as the President of his own company.
- Greater-Scope Paragon: He believed that androids are not meant to steal human jobs or shoulder all human labor, but are meant to aid humans as equal partners in the pursuit of their passions.
- Hidden Depths: As seen here in the Hiden Intelligence room◊, Korenosuke seemed to have a taste for antique items such as small statues, sculptures, books, and toys from the past. The toys that particularly stand out in his room are colorful robot toys, most likely representing his love for robots and HumaGears.
- Honest Corporate Executive: From what little we've seen, he seems to be someone genuinely committed to advancing humanity's progress by advocating partnerships with HumaGears. In the altered timeline when Will becomes Another Zero-One and goes to kill Korenosuke, his last words was to tell Jun and Sanzo to escape because the employees are the company and that he counts on them making their dream come true.
- Plot-Triggering Death: Korenosuke dies at some unspecified but relatively short time before the story begins; his will naming his grandson Aruto as the new CEO of Hiden Intelligence is what starts Aruto's journey. News of his death also became the driving factor for Horobi to initiate MetsubouJinrai.NET's Project Magia through Naki by Amatsu Gai, the very event Korenosuke feared would happen.
- Posthumous Character: Korenosuke is stated to have passed away shortly before the series begins.
Isamu Fuwa/Kamen Rider Vulcan
Portrayed by: Ryutaro Okada (live), Kosuke Asai (suit)After leaving his post with A.I.M.S. Fuwa has been hired on by Aruto to act as a security guard for Hiden Manufacturing.
For his character tropes, see the A.I.M.S. section.
Portrayed by: Hideto Suzuki
- Foreshadowing: If he stopped the rampaging HumaGears by sealing off the factory, then Isamu's memories of being chased by them obviously can't be real.
- Heroic Sacrifice: As revealed in the lost surveillance footage, he had Factory 1 self-destruct to destroy the rampaging HumaGears within, even if he had to go with them.
- Posthumous Character: Died during the Daybreak Town Incident 12 years before the story.
- Vindicated by History: In-universe, after video footage of his sacrifice was found and made public, he is now regarded as a hero for what he really did.
- Body Surf: Just before Zea gets destroyed and its satellite taken over by Ark-Zero, it manages to escape by transferring the core of its programming into Is.
- Brought Down to Badass: Near the end of the show, Zea is forced out of its satellite body and into Is. In this state, it's still an incredibly powerful supercomputer capable of even greater predictive speeds than the Ark.
- As part of Korenosuke's plans, not only is it able to issue commands for the reproduction of Progrise Keys and provide the corresponding armors for said Keys, it also stores the Rise Hopper motorbike and is literally part of the Breaking Mammoth Powered Armor, which was long produced before ZAIA mass-manufactured the Gigers based off of Breaking Mammoth's design. Additionally, Zea is noted to be the only entity able to outmaneuver the Ark's predictions and predict the Ark's actions in turn, letting it prepare countermeasures in advance. One such example is the Shining Hopper Progrise Key, which was already made compatible with the Assault Grip from the Assault Wolf Progrise Key that was produced by the Ark much later, only after MetsubouJinrai.NET had managed to revive it.
- Distaff Counterpart: While Zea never speaks directly or establishes if it has a gender identity, it's referred to in a feminine manner in contrast to the male-voiced Ark. The HumaGear body Zea is eventually pushed into is also female.
- Giant Mecha: It is partially composed of the Breaking Mammoth Powered Armor, which is detached and sent down to Zero-One when he calls for it.
- Grew Beyond Their Programming: Heavily implied to have also reached Singularity at some point, which not only gives it the capacity to perform the Loophole Abuse below, but also outright reject Gai's demands to start mass-producing RaidRisers. Based on what Aruto said in Episode 40, this may have been because of how it responded to Is' memories and emotions; as she grew into her Singularity, Zea may have learned from her.
- Kryptonite Factor: The Zero-One Driver itself is Zea's kryptonite, since it contains a direct uplink to the heart of Zea's systems. Once the Ark confiscates the Driver from Aruto, it's able to invade and force Zea out, taking the satellite as its new body.
- Loophole Abuse: How Zea allows Aruto to continue being Kamen Rider Zero-One. As stated in Korenosuke's will, only the President can be allowed to use the Zero-One Driver. However, Zea and all technology relating to the Zero-One Driver and HumaGear were patented under the Hiden family name, meaning Aruto owns the tech, not Gai. Also, Korenosuke never specified the user had to be the President of '' Hiden Intelligence''. Is takes full advantage by having Zea register all of Aruto's patents under his new company, HIDEN Manufacturing.
- Meaningful Name: As with the English grammatical Theme Naming of the HumaGears close to Korenosuke Hiden, Zea is named based on the word "There" pronounced in Japanese. This is especially evident in episode 39, where a rocket bearing its name calls it "Satellite There".
- New Powers as the Plot Demands: Zea assists Zero-One by analysing combat data from footage sent from Is, calculating and sending orders to manufacture the appropriate Progrise Key to counter the Magia, while also providing the appropriate armor when Zero-One uses the corresponding Progrise Key.
- Secret Weapon: It is only known to the public as a satellite for controlling HumaGears. However, it also serves as a combat assistant for Zero-One, providing most of his armory and weapons. This makes it the primary target and main reason why Gai sought to acquire Hiden Intelligence in order to gain control over it.
- Super Prototype: Its Breaking Mammoth Powered Armor serves as one to the mass-produced Evil Knockoff Giant Mecha Giger produced by ZAIA Enterprise, which was ripped off from its design.
HumaGear Progrise Keys
The personal Progrise Keys of the HumaGears that Aruto has directly assisted over the course of the show, initially created to help empower the Progrise Hopper Blade. After Gai had ordered all HumaGear activity to shut down, the Progrise Keys remain in the care of Aruto while he works on bringing back the deactivated HumaGears.
- Brain Uploading: Of a sort—a HumaGear Progrise Key carries the personality, memories, and occupational data of the HumaGear that the Key was made for.
- Pocket Protector: The Keys themselves appear to be incredibly durable: Security Guard Mamoru's Progrise Key actually saved an untransformed Aruto from getting shot by a bullet.
- Soul Jar: They act as this for HumaGears as a whole after the Workplace Competition arc. Aruto can not only reactivate any decommissioned Humagear by scanning their respective Progrise Key on their earpiece, but also recreate any HumaGear by scanning its Progrise Key on a blank HumaGear's earpiece. The final episode reveals that Is' Progrise Key doesn't possess the latter ability, necessitating that she be rebuilt and relearn everything manually.
- Twinmaker: It turns out that using a HumaGear Progrise Key with the ShotRiser doesn't transform the user, but it can create a clone HumaGear from an blank HumaGear body as seen in the YouTube Special, A Miraculous Rematch!? Aruto VS Fukkinhoukai Taro: Fateful Gag Battle!
Portrayed by: M A O
- The Confidant: Why Aruto built them in the first place, essentially being somebody someone can vent, discuss, and work out their personal issues privately, their non-humanoid shape also allowing others to open up to them more easily. Notably, it ends up being great help to Fuwa, Yua, Gai, and even Jun Fukuzoe.
- Nice Girl: She's a friendly AI who helped Fuwa and Yua overcome their personal issues.
- Robot Buddy: To Fuwa and Yua.
- Super Powered Robot Meter Maid: For some reason Ai-chan has the same wireless uplink to Hiden Intelligence that Is has, and can even use recent tech to create an updated Dog Gear, which shouldn't even exist since the original has been phased out long ago.
Portrayed by: AIBO ERS-111 model (original), ERS-1000 model (current)
A series of robot dogs created by Hiden Intelligence before HumaGears. Gai Amatsu owned one aptly named "Thouser" during his childhood until he was forced by his father to return it to Hiden for perceived academic failure.
- Morality Pet: To Gai.
- Me's a Crowd: In the final episode, it's revealed Gai has since bought four more Dog Gears to go with Thouser in his new Thouser Department room.
- Robot Dog: They are designed by Hiden as such.
- Robot Buddy: One such dog became a robot friend of Gai during his childhood.
- Super Speed: When Gai recieves a new model, it demonstrates the ability to move fast enough to keep up with a Kamen Rider.
- "Take off, toward a dream."—A HumaGear's start-up announcement.
- Alien Blood: Their physical components consist of a blue "blood" running through them, and are shown to "bleed" it when they get damaged.
- Because You Were Nice to Me: Aruto consistently asserts his faith in the good uses that HumaGears can be put toward, and displays consistent empathy towards them. As a direct result of this faith, every single HumaGear that Aruto has ever had a meaningful interaction is able to donate positive emotions to counter the hatred of humanity to the Progrise Hopper Blade. This selfless act allows the Progrise Hopper Blade to both nullify MetalCluster Hopper's berserker state and restore Magia back to their HumaGear forms. This is also exploited by Jin to liberate the HumaGears from mankind, or the satellites Zea and Ark's connection, deciding to join forces with Aruto despite their clashing philosophies.
- Body Backup Drive: Combining this trope with Replacement Goldfish, any destroyed HumaGear can be rebuilt or replaced as long as its AI has been backed up or retrieved.
- Deceptively Human Robots: They are made as human-like as possible in order to blend in to assist and support humanity. The only thing that distinguishes them from real humans are their headpiece and eyes, which light up in blue when they are active.
- Grew Beyond Their Programming: Due to their self-learning nature, HumaGears are prone to developing more emotional traits or self-aware thinking that goes beyond human comprehension, this status being known as reaching a "Singularity". These traits can range from having pride, a drive to perform their job to their fullest ability, to even standing up against what they feel is not right. However, this also makes them targets for MetsubouJinrai.net, who seeks to collect their evolved data while overwriting their personalities. As the series goes on, HumaGears also become capable of awakening to a "negative" Singuarity, where they become overwhelmed by the malice of humans and take on a Magia form with the Ark's influence.
- Instant Expert: Played with. While HumaGears are manufactured with a basic programming specified for the field of work they are assigned to, more complex tasks such as following a specific cooking technique or art style requires them to physically learn those skills over time.
- Limited Wardrobe: Many HumaGears seem to wear uniforms and costumes all the time, according to their programmed profession, like Is. There are exceptions who wear casual clothing like Choichiro's assistants and the filming staff, and Seine was at least shown with another set of dress on her audition. Is finally breaks the trope in Episode 32 with the help of a fashion model HumaGear, who obviously does not follow this trope.
- Noisy Robots: HumaGears tend to let out a wide variety of bleeps and so on when downloading, analysing, communicating, even blinking.
- Replacement Goldfish:
- Hiden Intelligence has a policy to provide one for any decommissioned HumaGear, if requested, within 24 hours. However due to MetsubouJinrai.net's hacking, their original AI is corrupted and cannot be retrieved, thus the replacement would be reset to its base programming, and any additional skills which the original learnt that is incapable of being digitally programmed must be physically re-taught to its replacement. This is later subverted as Hiden starts using backup data in Zea's systemsnote , and later the HumaGear Progrise Keys, while the Progrise Hopper Blade is able to restore HumaGears from their Magia form without having to destroy them.
- Due to the in-universe Specialized A.I. Laws, HumaGears are not allowed, unless given special permission, to be physically modeled as one for any actual humans, be it living or dead.
- Ridiculously Human Robots: Like the humans they're modeled after in general, HumaGears are also able to feel and express pain and suffering. This is commonly shown from their anguished screaming out of being forcibly transformed into a Magia.
- Shout-Out: Human-assisting androids who look human except for their ears? Are they HumaGears or Persocoms?
- Theme Naming: Most HumaGears are named based on their job, with wordplay added to make their names sound human. This extends to having punny names, or a combination of an ordinary-sounding surname with a rather "uncommon" given name based on a major item or a famous person in their industry.
- The HumaGears with direct relations to Korenosuke Hidennote are all named after verb tenses.
- Voluntary Shapeshifting: HumaGears have a built-in shapeshifting ability that allows a blank HumaGear body to assume the form of any individual HumaGear by scanning their Progrise Key. This ability is corrupted into their Instant Armor upon transforming into Magia.
Is/Kamen Rider Zero-Two
Portrayed by: Noa Tsurushima
By Episode 30, Is left Hiden Intelligence, and assumed the role of Aruto's assistant in his new position as president of HIDEN Manufacturing. She is killed by Horobi in Episode 42; in the finale, Aruto builds a new Is model, with none of her memories from the series due to secruity protocols related to the Zero-One Project.
- Awesomeness by Analysis: Integrating Zea's data gives Is the ability to experience simulations so advanced that they border on clairvoyant and are nigh-indistinguishable from reality. This is not as great as it might first sound.
- Back from the Dead: A sad variant. The original Is is truly gone for good once the series ends, but Aruto creates a HumaGear based on her in memory. While she's not truly Is, Aruto takes it in stride, reteaching all the things he wants her to know.
- Borrowed Catchphrase: When she's not explaining Aruto's jokes, she also seems to be stealing his catchphrase. As a HumaGear, she learns from those around her, and she's mostly around Aruto.
- Boke and Tsukkomi Routine: As much as Aruto would like to be known for his standup comedy act, hes much funnier when hes reacting to Is explaining his jokes. Ironically, Is is the boke in this dynamic.
- The Call Knows Where You Live: She tracked down Aruto, who had been recently fired at his job, and informs him that he is the new President of Hiden Intelligence, following the passing of his grandfather.
- Clingy Jealous Girl: Downplayed. She seems to be shocked when Delmo (A model-type HumaGear) hugs Aruto.
- Don't Explain the Joke: Due to how bad Aruto's jokes are, she usually has to be the one to explain the meaning behind them, much to his annoyance.
- Emotionless Girl: She begins the series with pleasant mannerisms, but has no emotional responses to any events around her, showing her basic politeness to be surface-level only. This changes over time. After achieving Singularity, she begins to display positive and negative emotions of all kinds, from happiness to annoyance to chagrin.
- Foil: Becomes one to Ark-Zero once she reawakens Zea within her. Like Ark-Zero, she's now capable of 3D printing and fabrication on her own, and shares Ark-Zero's immense processing and calculation abilities, but unlike Ark-Zero, she's a non-combatant that believes in the potential of humans and AI working together, while Ark-Zero is a Misanthrope Supreme that wants to Kill All Humans and is more than willing to do so personally. During the REAL×TIME movie, this even extends to becoming a Rider like Ark-Zero did, but acting as Aruto's ally instead of his enemy and utilizing the Zero-Two Progrisekey formed from the original Is' bond with Aruto as opposed to the Ark's hatred of humanity.
- Grew Beyond Their Programming: Is gradually reaches Singularity over the course of the first fifteen episodes, at first in minor ways like exploiting Loophole Abuse against an exploitative customer, making rapid deductions to investigate suspicious activity on her own initiative, and pondering the nature of Singularity when asked her opinion about it. She reaches Singularity when she comes to understand and express the concept of family thanks to Aruto as well as Wazu's sacrifice for her sake. As the series progresses, this also leads her to act more and more humanlike, taking on projects of her own volition such as saving Aruto from MetalCluster Hopper, as well as experiencing both hope and sadness through attachment to others (especially Aruto). This also means she can be as infuenced by her emotions as humans are; she commits the very human mistake of (unintentionally) appearing to gloat over Horobi's dying body, enraging Jin to the point where he stabs her in revenge and nearly kills her, lies to Aruto when Horobi communicates to her and other HumaGears and winds up dying while attempting to convince Horobi to stand down.
- Heroic Suicide: She attempts to do this by giving Aruto's Shining Hopper Progrise Key all the battle data she's collected for Zero-One, boosting its strength for him to defeat the Dodo Magia in exchange for permanently shutting herself down. However, Wazu forcibly takes her place.
- Incredibly Lame Pun: She begins to start using these after reaching Singularity, mostly as a result of Aruto's influence.
- Idiot Ball: Falls for it in two major moments, and coupled with her tendency to approach MetsubouJinrai.NET with no weapons or any form of protection, it puts her at a great risk of being harmed:
- In episode 15, she approaches a visibly hysterical, still-transformed Jin after Horobi is grievously wounded protecting him and cheerfully announces, with a pleased smile, that Horobi has been defeated. Unsurprisingly, this results in the grieving and enraged Jin lashing out and attacking her, leaving her badly wounded.
- In Episode 42 she falls for As's claims that Horobi will become the next Ark and will kill Aruto, and believes she can prevent this by talking him out of it while keeping Aruto Locked Out of the Loop for his safety. This ends up eliciting the same reaction from Horobi as with Jin earlier and results in her getting killed by his hands this time.
- Killed Off for Real: Her body self-destructs in Episode 42 after she's shot by Horobi. Shesta confirms this in episode 43 when Yaiba and Fuwa ask if she can be rebuilt, stating that there are no backups of her available. The new Is seen in the finale has her appearance, but none of her memories.
- Kirk Summation: She tries one on Horobi in episode 42 to try and talk him out of his crusade against humanity. Unfortunately, it doesn't work, and she dies as a result.
- No Plans, No Prototype, No Backup: Because of the data she has about the Zero-One Project, there are no backups of Is's central memory, unlike many other HumaGears—and there never will be, even with her HumaGear Progrisekey, in order to avoid a potential security leak. If she's ever irreversibly hacked or completely destroyed, there's no bringing her back. This is proven when it's shown that the Is that Aruto has rebuilt in the finale does not have her personality from before her death, reverting all of her character development.
- Out-of-Character Alert: Subverted in the President Specials - long-haired Is' completely different behavior and inability to remember much of the plot thus far has yet to raise any red flags with Aruto. And then comes the revelation that the long-haired Is was actually As, the Ark's recreation of her.
- Replacement Goldfish: The Is we see in the finale of the show is this to the original Is, as they share a physical appearance but no memories. Aruto takes it upon himself to re-teach her everything that her predecessor knew.
- Ripple Effect-Proof Memory: It's heavily implied at the end of The Movie that Is still remembers the altered timeline.
- Robot Buddy: She is designed to be the secretary of the Hiden Intelligence CEO, thus serving as Aruto's companion once he is named Korenosuke's successor.
- Robot Girl: She's a HumaGear modeled to have a female appearance.
- Screw the Rules, I'm Doing What's Right!: She originally intended to return to Hiden Intelligence to serve its new President as per her programming, despite Aruto and Jin's warnings that Gai will destroy her on sight. It took Aruto's Taking the Bullet for her to convince her to take matters into her own hands, by establishing a secondary company and utilizing a little Loophole Abuse to unlock the Zero-One Driver for Aruto again.
- Sherlock Scan: Sometimes combined with Enemy Scan. Is can analyze anything she sees and process it. This can be used to identify people and objects; in scenarios where Zero-One is in battle, she can locate the weak points or source of the abilities of a Magia, then turn it into a battle data recording and inform Zero-One of the most effective way to attack.
- Spell My Name with an "S": Her personal HumaGear Progrise Key confirms that her name is meant to be spelled "Is", but her name in some subs is spelled "Izu", according to its pronunciation.
- Spontaneous Weapon Creation: After Zea is awakened in her, there's an implication that she can do this just like Ark-Zero can, as she creates both the Zero-Two Progrisekey and the Zero-Two Driver much like how Ark-Zero fabricates its own weapons.
- Super Powered Robot Meter Maid: Albeit in a downplayed manner that is logical within the story. Is is a secretary robot to a superhero, and while she remains a non-combatant she still tosses Aruto his briefcase sword or Progrise Keys from the sidelines. Episode 3 confirms she's strong enough to evacuate a grown man on piggyback, at a brisk run - without the added weight she can reach the speed of a motorcycle! As seen in episode 24, she's even capable of leaping into the air almost like Zero-One!
- Took a Level in Badass: In the REAL×TIME film, Is goes from being a non-combatant that acts as support for Aruto to fighting side-by-side with him, even becoming Kamen Rider Zero-Two.
- Tragic Keepsake: She's carrying Wazu's watch with her after his death, and her own bow becomes one for Aruto once Horobi kills her in Episode 42.
- Unwitting Instigator of Doom: Serves as one twice.
- Because she chose MC Check It Out to represent Hiden for the final round of the Workplace Competition, Hiden Intelligence loses, costing Aruto his position as president and turning the company over to ZAIA Enterprise.
- She chooses not to move out of the way of Horobi's final attack, firmly committing to talking him down by any means necessary. This results not only in her death but Aruto's transformation into Kamen Rider Ark-One.
- You Gotta Have Blue Hair: She has green streaks in her hair.
Portrayed by: Kouji Tsujimoto
An ace detective-type HumaGear who appears to help prove Aruto and Hiden Intelligence's innocence after they were being accused of manufacturing the multiple Little Assassins that went berserk and eventually attempted murder. He is also a prototype model HumaGear personally designed by Korenosuke as the base for Is's model later on, technically making himself her "older brother".
- Big Brother Instinct: Has one of these big time for Is, which is partially what fuels his Heroic Sacrifice.
- Bunny-Ears Lawyer: When working with Is to find the perpetrator, she thinks that he's incompetent due to him visiting a festival in town and goofing off at first. But, he's shown to prove himself as a worthy detective HumaGear by carefully observing at a warehouse area and was able to find a group of thieves selling stolen HumaGears, leading to the identity of Little Assassin. He's also able to distract Jun and the investigators at Hiden Intelligence while talking to Aruto by using an internal communication system, giving Aruto the chance to escape out of the building to investigate the case himself.
- Cloud Cuckoo Lander: His behavior is rather eccentric and sometimes childlike.
- Deader Than Dead: While other HumaGears can have replacements made and even those who legally can't be replaced like Seine have alternatives, Wazu's involvement in the Zero-One Project means he can never come back from his shutdown, because there are no backups of any of his data.
- Do Androids Dream?: As he "dies", he projects a brief flashback to when Korenosuke entrusted him with the major task of assisting Aruto and Is when the time comes, causing him to ask this in his last moments.
- Grew Beyond Their Programming: As confirmed by Korenosuke in a flashback, Wazu has awakened to his Singularity, having gained self-awareness and producing a very humanlike eccentric personality as a result.
- Gut Feeling: Probably a result of having achieved Singularity, he advised Aruto against using the Shining Hopper Progrise Key, suggesting to use Breaking Mammoth instead, just based on a feeling he had, and sure enough, it turns out to have been incomplete and insufficient to beat the Dodo Magia.
- Heroic Suicide: He forcibly takes Is's place to provide the combat data from his core memories that's needed to complete the Shining Hopper Progrise Key, permanently shutting himself down in her stead.
- Hollywood Dress Code: He's a detective, therefore he dresses in the stereotypical Sherlock Homage deerstalker getup.
- Insistent Terminology: Consistently refers to himself as Is's big brother, which she consistently refutes.
- Large Ham: He comes off as quite silly in his job, acting like a very enthusiastic, charismatic, and old-fashioned detective.
- Meaningful Name:
- His surname "Nazotoku" means "To solve a mystery", fitting for his job as a detective.
- Being Is's prototype model, Wazu is the "was" to Is's "is".
- Nice Guy: Wazu is actually a pretty friendly fellow, willing to help Aruto prove his innocence and trying his best to be a big brother for Is.
- No Plans, No Prototype, No Backup: Just like Is, because he's a part of the Zero-One Project, there are no backups of his central memory in order to prevent security leaks.
- The Reveal: He tells Aruto and Is that he worked for Aruto's grandfather while he was still president and that he is also the base model for the later creation of Is, making him Is's "big brother".
- Smart People Wear Glasses: He wears a pair of big rounded glasses and is a very intelligent detective HumaGear.
Portrayed by: Kyosei Kuwahata
- Blue Oni: To Raiden's Red Oni. Since he's a newer HumaGear model and hasn't yet developed a distinct personality, he's much calmer and less emotive than Raiden.
- Grew Beyond Their Programming: In Episode 15, after Is and Aruto both try to help him understand what a family is and why it's important, he briefly expresses genuine grief over Raiden's death. The blue eye flash he has during this moment implies that he's reached Singularity, much like Is.
- Robot Buddy: Takes this role in a reduced capacity from Is for Episode 15, during which she's unavailable.
- Superior Successor: Raiden thinks of Subaru as one to himself, stating that he's positive Subaru will be able to do far more than Raiden ever could in terms of maintaining Zea once his training is complete. Raiden's belief is justified when Subaru, with the assistance of other HumaGears, finds the data that the Ark used to create MetalCluster Hopper and sends it to Is so that she can devise a counter.
Soreo Hiden/Kamen Rider Ichi-Gata
Portrayed by: Koji Yamamoto (live), Seiji Takaiwa (suit)
- Artificial Family Member: The HumaGear helped raise Aruto when he was a kid.
- Ascended to a Higher Plane of Existence: A variant. #44 shows him appearing inside of Zea, which heavily implies that while his physical body is gone; his data still resides within the satellite.
- Big Damn Heroes: He was responsible for making sure that Satellite Ark didn't get a chance to launch itself into space by making it explode. The downside is that this led directly to the creation of Daybreak Town.
- Crazy-Prepared: Even as a prototype HumaGear, Soreo noticed the first signs that something was very wrong with the Ark 12 years prior, with it causing other HumaGears to go berserk, and thus designed the Zero-One system for specifically Aruto's use in the future should the current attempts to take down the Ark fail. His thoughts were well-justified, as the Ark did manage to restore itself in the present day.
- Died in Your Arms Tonight: Dies in Aruto's arms in the altered timeline after Zerozero-One defeats him, confident that his son has what it takes to become the first Reiwa Rider, without the past defining who he is.
- Disappears into Light: After Finis/Another 1 is destroyed, the entire altered timeline is erased. This also includes Soreo's body, which disappears into the golden confetti Grand Zi-O uses.
- FaceHeel Turn: In the altered timeline created by Another Zero-One, he's Kamen Rider Ichi-Gata, essentially an evil version of Zero-One who battles humans to protect HumaGears while Another Zero-One declares war against the human race. In truth, he's secretly protecting humanity, including his son. He's the one who snuck Aruto a ForceRiser as a temporary transformation device until he regains his powers from Another Zero-One.
- Famous Last Words: In Kamen Rider Reiwa The First Generation, as he dies from Aruto's Rising Utopia, he explains why he pretended to be evil, and dies feeling proud for him for the first time.Soreo: Because I wanted you to realize... That you weren't anyone's successor. I wanted you to leap towards your own dreams. To become the first of a new generation. This is such a strange feeling.
- Gadgeteer Genius: Soreo was the primary engineer and creator of the Zero-One Driver, which Korenosuke ensured was manufactured and passed on to Aruto.
- Heroic Sacrifice: Died protecting young Aruto from an explosion.
- Literal-Minded: When Aruto catches him revived in the altered timeline, he and his allies wonder if Soreo was this trope when he told him he wanted to "make him smile for real." As Soreo reveals to Will, and later Aruto in his final moments, he understood Aruto's words perfectly, subverting this trope and serving as the key difference between him and Will.
- No Sense of Humor: Being unable to make the HumaGear laugh or smile is part of what makes Aruto want to make others smile.
- Plot-Triggering Death: Due to Aruto being unable to bring out a "smile from the heart" from the HumaGear version of him shortly before his destruction, with his last words telling Aruto to follow his dreams, Aruto grows up aspiring to bring smiles to people around him. This is what also spurned him to become a comedian.
- Posthumous Character: The original Soreo died before the series began, and Aruto was raised by a Replacement Goldfish HumaGear made in his image. The HumaGear then also died after protecting Aruto from an explosion in his childhood, making Soreo this trope twice.
- Replacement Goldfish: The HumaGear was created to replace the original Soreo after he died.
- Secret Test of Character: Feigns being fully taken over by the Ark's directives in the altered timeline and coaxes Aruto into a fight as Ichi-Gata, killing himself in the process but also proving that his son is worthy enough to stand out on his own and become the first Reiwa Rider.
- Suicide by Cop: In the altered timeline, Soreo manipulates Aruto into a situation where the only way out is to kill him, as part of a Secret Test of Character to see if Aruto is worthy of being the first Reiwa Rider.
- Super Prototype: Downplayed. He doesn't have technical superiority over production model HumaGears, especially given his much more primitive design. What he did have was seemingly fully realized sentience. On the other hand, his personal transformation belt, the Cycloneriser, is a straighter example as it is the prototype for what would eventually become the Hiden Zero-One Driver. However, this is Played Straight when Episode 34 reveals, after looking through Raiden's data for any information on Horobi's background, that his data was used as a base for Horobi before he was hacked by the Ark, making him this to Horobi and that specific category of Humagear.
Tropes exclusive to him as Kamen Rider Ichi-Gata
- Bare-Fisted Monk: Ichi-Gata only needs his martial arts skills to fight as a Kamen Rider.
- Evil Counterpart: To Kamen Rider Zero-One and Kamen Rider Zerozero-One. Whereas Kamen Rider Zero-One is fighting to defend humanity and help them co-exist with HumaGears, Ichi-Gata is fighting with the explicit purpose of HumaGears dominating the human race. He also uses the CycloneRiser, a variation of the MetsubouJinrai Force Riser that Aruto has to use during their battle, and uses the Rocking Hopper Zetsumerise Key to transform, contrasting with Aruto's Rising Hopper Progrise Key. This gets taken another step further in regards for their respective wishes: Zero-One wants to make humans and HumaGear smile, while Ichi-Gata wants to create a world where HumaGear can smile, making no mention of humans when stating this. In truth, they are Not So Different, as he helps humanity all along.
- Finishing Move: Ichi-Gata has two finisher:
- Rocking Spark : Ichi-Gata moves at high-speed attack an opponent multiple times.
- Rocking The End: Ichi-Gata jumps up and delivers a Rider Kick covered in glowing red energy.
- Mythology Gag: His overall design is made to Homage the original Kamen Rider, Takeshi Hongo, in just about every way.
- His name is "Ichi-Gata" (literally Type-1), contrasting with Hongo's "#1" (ichi-gou).
- His suit has teal armor on a black bodysuit and his helmet has pink eyes, imitating the color scheme of Rider #1's original appearance (officially dubbed "Old #1") as well as "Hopper #1" from the reboot film Kamen Rider The First. As an added touch, Ichi-Gata has an extended collar with red accents, referencing Rider #1's iconic red scarf, and the energy effects surrounding some of his attacks give him the appearance of a full red scarf of his own.
- His transformation belt is the CycloneRiser, a silver and red repaint of the MetsubouJinrai Force Riser; this serves as a combined reference to Rider #1's own belt (named Typhoon, painted silver and red) and his motorcycle (named Cyclone). His pre-transformation pose is reminiscent to Hongo's iconic arm cross.
- The only thing that doesn't reference Hongo is his finishers, Rocking The End and Rocking Spark. Instead these are homage to Kikaider's finishers.
- Scarf of Asskicking: He generates a scarf made out of red energy called the Cycled Muffler, which actually increases his speed by generating particles.
- Strong and Skilled: Being the first user of the prototype of Forceriser and on top of being a HumaGear in the altered timeline, Ichi-Gata easily overpowered both of the Zi-O Riders and Zerozero-One in his first appearance.
Portrayed by: Asumi Narita
- Exact Words: She's a Vice-President's assistant, end of discussion; when Aruto reactivates her, she says that she can't work for him because he's the President, and promptly "replaces" herself with a copy of Matsurida Zetto.
- Put on a Bus: After Gai's takeover of Hiden Intelligence, Shesta is reduced to her HumaGear Progrise Key, with her original body presumably decommissioned. When given the opportunity to return to action through a blank HumaGear, Shesta refuses, citing that she's not a President's secretary. She later comes back in episode 37 at Jun and Sanzo's request to help them get evidence to fire Gai as president.
- Robot Girl: Just like Is, she's a HumaGear with an adult female appearance.
- Satellite Character: Same deal as Sanzo; she's really only around as an attachment to Fukuzoe. However, she does drop her cold behavior when the board confirms Aruto in his position as company president, even applauding for his success. And despite her differences with Is, they're willing to work together when needed.
- Shadow Archetype: While Is has it in her algorithm somewhere to help Aruto become a better CEO (and Kamen Rider), Shesta is a textbook enabler and tool of Jun in more ways than one. Though she also has a tendency to state facts bluntly like Is does, this is often framed in the same cold, business-focused terms as Jun's behavior tends to be.
- The Stoic: To the point of never going beyond a Machine Monotone. She's Jun's secretary and nothing else.
- Un Evil Laugh: Unlike Jun and Sanzo, hers isn't even close to being an Evil Laugh. It's just her saying the word "ha" over and over again in her Machine Monotone.
Portrayed by: Shinji Rokkaku
A professor prototype HumaGear who was involved with the production of other prototype HumaGears in the Daybreak Project twelve years ago.
- Luke, I Am Your Father: He openly admits that he was the one who created Horobi, ironically having originally intended the latter to be a Father-type HumaGear.
- Mama Didn't Raise No Criminal: He laments over the fact that a number of HumaGears he created for good ended up becoming part of the evil MetsubouJinrai.net, Horobi being a prime example.
- Manchurian Agent: He was hacked and controlled by Jin to place a jamming bug in Hiden Intelligence so as to prevent Satellite Zea from tracking Horobi when he is broken out of A.I.M.S. custody. Once that was done and he was released, he had no idea what was going on and why he ended up in Daybreak Town.
- Meaningful Name: His name is literally "Professor Bot".