Characters / Kamen Rider Zero-One (Aruto Hiden)

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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.

This page details tropes for Aruto Hiden from Kamen Rider Zero-One.

Note: Unmarked spoilers ahead. If you're starting the series, do not read this page!

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Aruto Hiden/Kamen Rider Zero-One/Kamen Rider Zerozero-One/Kamen Rider Zero-Two (I)/Kamen Rider Ark-One (I)

Portrayed by: Fumiya Takahashi (live), Yuya Nawata (suit)
Young Aruto Portrayed by: Haruto Nakano

CEO of Hiden Intelligence and Hiden Manufacturing

^{Click here to see young Aruto.
Click here to see Aruto in Reiwa Generation.}

There's only one person who can stop you, and that's me!

The protagonist of Zero-One, as well as the titular Rider. Aruto Hiden is a 22-year old kind-hearted failed comedian who is suddenly named the President of Hiden Intelligence and receives the authority to transform into Kamen Rider Zero-One following the passing of his grandfather. After losing his inherited position, Aruto goes on to start his own company, Hiden Manufacturing. He eventually resumes presidency of Hiden Intelligence to reinitiate HumaGear production in order to assist humanity's recovery and counteract the Ark's destruction.

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General Tropes

• A Father to His Men: Or, HumaGear, which he also sees as equals to mankind in society. Aruto constantly asserts nothing but good faith and optimism in them and salvaging the destroyed body of 119nosuke, even if his memory can be restored on Zea's memory bank and uploaded to a new body. When ZAIA Enterprise bought Hiden Intelligence, Aruto spent two episodes salvaging a discarded HumaGear to be repaired in Hiden Manufacturing and greeted it with pure joy upon its activation.
• All-Loving Hero: Is a Decon-Recon Switch on this character archetype due to the series emphasizing that his deep empathy for humans and HumaGear alike and his desire to see them live and work together peacefully also means that he feels very deeply when either is hurt. The first hint comes when his anger at Gai causes Shining Assault Hopper's chestlight to glow with the same ominous red light as the Ark, and when Horobi kills Is despite Aruto trying to reach out and appeal to his better nature for so long, it drives Aruto to accept the power of the Ark and become Kamen Rider Ark-One. The reconstruction comes once he realizes that he's simply perpetuating a cycle of endless hatred that will destroy the world, leading him to reject Ark-One's power, allowing him to gain Realizing Hopper, defeat Horobi, and talk Horobi around to a Heel Realization and Heel–Face Turn.
• And I Must Scream: Unlike previous berserker forms such as FangJoker, PuToTyra, or Hazard, Aruto is fully aware of what is happening as his body is being possessed while in MetalCluster Hopper but is utterly powerless to do anything to stop the Ark from wreaking havoc on all in its way. With the Progrise Hopper Blade made from gathering data from several HumaGears he knew well, including Is, Aruto fights off the Ark's corruption, and then gets teleported into Zea, freeing him and averting this trope.
• Androids Are People, Too: He is a fervent believer of this, due to being raised and saved by his HumaGear father, and thus works to save both humans and HumaGears alike.
• Ascended Fanboy: Is a huge fan of the In-Universe Perfuman Sword manga and was practically squeeing when he got to meet the manga's artist even as President of Hiden Intelligence.
• Badass in a Nice Suit: After he's named the new CEO of Hiden Intelligence, he starts wearing a suit… over his hoodie, showing his lack of professionalism. When he does do something actually worthy of his CEO title, however, he wears the full thing and looks a lot sharper. He's also a Kamen Rider, so naturally he qualifies for the badass part.
• Benevolent Boss: Despite Aruto's lack of experience in the business world, he inherited his grandfather's good faith in workers. He reprimand others only when he needed to (such as 119nosuke), but gives credit when its due.
• Berserk Button: In general, people who mistreat HumaGears or disrespect people's dreams. Gai quickly turns himself into Aruto's biggest berserk button of all, both because he's responsible for everything that's happened with the Ark and because he's an arrogant prick.
• Boke and Tsukkomi Routine: Although his intended comedy act falls flat, the show itself manages to derive much humor from him and Is playing off each other when she explains the joke. This ironically makes Aruto the tsukkomi in the dynamic when he’s trying to play the boke, something Fukkinhoukai Taro lampshades in the YouTube special.
• Butt-Monkey: He is late to his job, finds out an android is a better comedian than he is and trips performing a dramatic slide after the finisher. In the very first episode.
• The Cape: Aruto's primary motivation is the help others fulfill their dreams and help people and HumaGear alike simply because it's the right thing to do and he's an All-Loving Hero. He's also a fundamentally honest person who will always tell the truth if he has a choice. He temporarily loses these traits during his stint as Ark-One when he hits his Despair Event Horizon.
• Cannot Tell a Joke: Aruto Hiden aspires to be a comedian but because his routine is all about half-baked puns and excessive overreacting even by Japanese standards, no one laughs at them, save for Isamu Fuwa.
• Catchphrase:
  • "There's only one thing that can stop you, and that's me!"
  • Whenever he gets asked for his name in combat, he replies, "Zero-One! That's my name!"
  • He usually ends his jokes with: "Yes! It must be me, Aruto!"^NoteThe original catchphrase is "Aruto ja nai to!", a rhyme that roughly translates to "And that's Aruto!" It is translated differently depending on the subs group you watch. For the official subtitled release, it was translated as "And that's Aruto, folks!"
• The Chains of Commanding: He is responsible for the company and whatever happens with the HumaGear is automatically blamed on him. The pressure starts growing exponentially after MetsubouJinrai.NET's attack on the hospital in #8 and #9, leaving him pressured.
• Character Development: Aruto respected HumaGears as individuals, but his encounters with the revived Jin made him realize that HumaGears can also have the same rights, freedoms, and dreams as people do. So not only is Aruto fighting for the safety of HumaGears, but also fighting for their individuality when they reach Singularity.
  • The fact Aruto started up Hiden Manufacturing is another sign of his growth. Early on, Aruto wanted nothing to do with Hiden Intelligence, set on becoming a comedian. He reluctantly took the President position in order to be Zero-One. Over the course of the series, we see him slowly adjust to the role, fighting hard to make sure it didn't get bought out by ZAIA. For him to start his own company to help people and HumaGear alike shows how far he's come.
  • Another form of growth within Aruto applies to his fighting style as well. His first experience with a weapon, the Attache Calibur, in the series, had him fumbling with it and taking some time to properly deploy, an awkward moment since he was already transformed into Zero-One. The epilogue movie REAL×TIME, on the other hand, has him wielding the Attache Calibur with such finesse that he's able to fling it across a large church hall with enough speed and precision to stop Bell from killing Rihito with a close-range attack, untransformed.
• Cheer Them Up with Laughter: Following an incident in his childhood where he failed to get a "smile from the heart" from his HumaGear father shortly before the latter's demise, with his last words telling Aruto to follow his dreams, he grows up to be an aspiring comedian to bring smiles to people around him. He soon learns there are other ways to bring joy to people, such as being a hero.
• Color-Coded Secret Identity: Thankfully it's not too outrageous, as the prominence of the colors is switched around (Zero-One is black with neon yellow armor and some red highlights; Aruto meanwhile wears his suit with a bright red hoodie and neon shoes).
• Contrasting Sequel Protagonist:
  • He serves as this to Sougo Tokiwa in a variety of ways. On a meta level, Sougo was the final Rider of the Heisei era while Aruto is the first of the Reiwa era, and in-series, they are also completely different: Sougo was a high schooler with an absurd dream to become a king which ulimately is within his power, while Aruto is an adult with a modest dream of "making people smile" that he isn't skilled enough to pull off via his chosen profession (comedy), though he is able to succeed once he changes his focus. They also both utilize evil powers at the end of their respective stories (Oma Zi-O for Sougo and Ark-One for Aruto), but while Sougo used Oma Zi-O to kill the Big Bad and repair all the damage caused to the timeline, Aruto discarded Ark-One's power and utilized a stronger version of his base form to defeat Horobi without destroying him.
  • While Emu Hojo and Aruto are All-Loving Hero primary Riders of their respective series. both of which are written by Yuya Takahashi, that may be the only similarity. Emu is an unpopular doctor and also the Patient Zero who values everyone's lives due to an incident caused by his Patient Zero infection, while Aruto is a president of a famous company who got the position via Nepotism. Both see humanity in another race (Bugsters for Emu, HumaGears for Aruto), but Emu spent most of his time opposing Bugsters due to them being naturally human's enemies, while Aruto spent most of his time caring for HumaGears, only fighting them when he has no choice to. Emu also refused to sway from his heroic nature, even when some of his friends wound up dying, while Aruto was traumatized by Is's death long enough to accept Ark's power.
• Cornered Rattlesnake: Untransformed, he's very strong compared to what his physique suggests, but this only shows itself in mortal danger. Coincidentally, both incidents that demonstrate this involve an Attache Calibur, albeit in opposing manners (being able to withstand Will pressing it into his shoulder and recovering with naught but a gauze sling vs. making an inhumanly-precise and well-timed shot to stop Lucifer by throwing it at blinding speeds across a large church hall.)
• Crazy-Prepared: It Runs in the Family. Even without being aware that he has the personal rights to all HumaGear and Zero-One's technology, he had all the HumaGears' data transferred from Zea into Progrise Keys kept on his person before he stepped down, preventing Gai from permanently erasing all HumaGear data himself. Mamoru's Key even doubled as a handy Pocket Protector when he Took The Bullet for Is.
• Dark and Troubled Past: The Daybreak Incident killed his Humagear father. It's also why the reason he sees Humagears and Humans as the same.
• Determinator: Like many Riders before him, he has a resolute streak that drives him forward through the good and bad. In the first episode, he charges at the Berotha Magia unarmed to save people and getting knocked around doesn't stop him. He also does not lose his conviction even when he loses the Workplace competition against ZAIA and thus his company, instead he just keeps walking with a face of grim determination complete with the episode title showing underneath him.
  Episode 29: Our Dreams Don't Break
  • The Zero-Two jingle sums up his conviction the best:
    It's never over.
• Don't Explain the Joke: Says this word-for-word when Is takes apart his joke in order for people to understand it.
• Dork Knight: He is a Kamen Rider, but he also aspires to become a comedian. Sadly, no one laughs at his quips. Even in the world of business, he's not afraid of cracking some jokes and goofing around. The first thing he does in his grandfather's room is to fiddle around with all of the decorations and machinery in there out of excitement. He also playfully calling his Progrise Keys with some kind of Affectionate Nickname (for example, he refers Flaming Tiger Key as "kitty").
• Early-Bird Cameo: He makes a brief appearance in Kamen Rider Zi-O: Over Quartzer, as part of a dream that Sougo wakes up from at the beginning of the movie.
• Ensign Newbie: Due to having only inherited his position as President through nepotism, Aruto is completely new to corporate work and the A.I. industry, generally lacking work ethics and the intellect to create/fix robots his grandfather was widely known for, and he barely scrapes by his days at work by just being a Honest Corporate Executive.
• Foil: To Corrupt Corporate Executives like Gai. Gai is also a Kamen Rider and CEO, while engaging in several underhanded schemes to get his company ahead. Aruto, on the other hand, is a Honest Corporate Executive who uses his position to help HumaGear and humans co-exist while fighting to defend both as Zero-One, even going so far as to reveal his identity to Isamu, in spite of Is telling him otherwise.
• For Happiness: Aruto wanted to become a comedian because he enjoys the laughter and smiles from everyone.
• Giftedly Bad: He really wants to be a great stand-up comedian, but his entire style of comedy consists of very lame puns and ridiculous overacting even by Japanese comedy standards. No matter how much he tries, he only ever gets awkward silence from his audience (if they haven't left the room already). Not that it ever stops him. So far, the only one to find his jokes funny In-Universe is Isamu.
• Godzilla Threshold:
  • In Kamen Rider: Reiwa The First Generation, due to the presence of Another Zero-One, Aruto can't use the Zero-One Driver to transform. As a result, he has to use another transformation belt. The belt in question? The MetsubouJinrai ForceRiser.
  • In #30, after being displaced as the President of Hiden Intelligence and Gai's order to recall and decommission any and all HumaGear that are still functioning, Aruto decides to fight back against Gai's orders and go to save Is after she's deactivated. The person he goes to for help in rescuing her? Jin.
• He's Back!: After a pep-talk with his father, Aruto lets go of the malice he has for Horobi once and for all, finally transforming back into Zero-One and becoming a hero once again. He even becomes the Aruto we all know and love once again, ending the show with a bright smile on his face.
• Hero with Bad Publicity:
  • Subverted. Aruto initially follows Is's suggestion of hiding his identity as Zero-One from A.I.M.S, which of course leads to some misunderstandings between him, Isamu and Yua during their initial meetings until Aruto decides to transform in front of Isamu to prove he is an Honest Corporate Executive.
  • Played straight to a depressing degree in the Hiden Intelligence VS ZAIA Enterprise Arc. Thanks to Gai tossing a ZetsumeRiser at MC Check It Out's feet and the latter transforming into a Magia of his own free will, the public sways to Gai's belief that HumaGear are dangerous and should be scrapped. Making matters worse is that the public also turns against Aruto when he attacks Thouser when trying to stop the fight between MC Check It Out and Yua. By the end of #28, the majority of the public is now fully behind Gai.
• Hidden Depths:
  • Surprisingly enough, when he isn't trying to make a joke Aruto is shown to actually have the people skills and PR chops you'd expect from the CEO of a large corporation.
  • Aruto can be possessive when it comes to his equipment. He demands Jin give back the Flying Falcon progrise key he stole and gets mad at Fuwa when Fuwa takes the Attache Calibur, also demanding he give it back. And Aruto even attempts to use Jin's Attache Arrow to fight him when he used the Attach Calibur.
• Honest Corporate Executive: In contrast to villains such as Kuroto Dan or Juzaburo Namba, Aruto runs on this in order to defend people from MetsubouJinrai.net, as well as to clear Hiden Intelligence's reputation and have everyone live in harmony with the HumaGears without any form of misunderstandings. He begins asserting his credentials regarding this as early as #2, where rather than try to cover up the Magia situation as Jun tries to do, Aruto makes the identities of the true culprits public knowledge, complete with video evidence, and then in #4 where he reveals that the Daybreak Incident was also caused by MetsubouJinrai.net in order to exonerate a lab technician that was blamed for it. In the same episode, he also revealed his Zero-One identity to Isamu, making his secret identity last for only 3 episodes.
• Incredibly Lame Pun: His comedy is heavily reliant on quick wordplay gags. Even in-universe, they're considered rather half-baked compared to those of his fellow comedians who use longer jokes or props.
• Instant Expert: Played with. When Aruto first puts on the Zero-One Driver, it uploads his consciousness into Hiden Intelligence's satellite, where he goes through a Year Inside, Hour Outside tutorial on its usage before regaining consciousness to combat the Magia and even then, in his first use of Rising Impact, while he successfully defeated the Berotha Magia, he failed to stick the landing and crashed against the wall.
• Large Ham: He has a remarkable range of exaggerated expressions and tends to overreact at times. It's also part of his routine as comedian.
• The Main Characters Do Everything: Aruto's inexperience with corporate work leads him to believe being the company's president also requires him to meet every client face-to-face and personally deliver their HumaGears (and of course, he's also pulling triple duty as a Kamen Rider), which tends to perplex other company staff. Of course, this conveniently lets him keep running into new adventures every episode.
  • Of course, given that he only accepted becoming a CEO to be able to protect people as Zero-One, this works on his favor.
• Meaningful Name: His given name literally means "Alternate Person", while it is also read similarly to how the "Alternate/ALT" button on a keyboard would be read in Japanese Ranguage. This is signified through a keyboard-based merchandise having his name on where the ALT button would be.
• Nepotism: How he ends up becoming Kamen Rider Zero-One and Hiden Intelligence’s CEO.
• Nice Guy: Aruto's dream is to make people smile. It was why he became a comedian. This dream also means protecting smiles, like a certain other Rider who was the first of his era. And he respects HumaGears and cares for them very much. A good example is from #2, where Aruto has a friendly conversation with a security HumaGear named Mamoru and thanks him for protecting the employees at Hiden Intelligence. Aruto sees a wound on Mamoru's arm and it reminded him of his father, so he decides to give him a handkerchief bandage to cover up his wound. He even tells Mamoru that they are a family together after finding out his grandfather gave Mamoru his name.
• The Nicknamer: Does this to the Progrise Keys that are/was in his possession (i.e Flying Falcon is dubbed Tori-chan/Birdy, Flaming Tiger is dubbed Tora-chan/Kitty, etc).
• Plot-Sensitive Snooping Skills: Jin's suspicions on Ikazuchi's abrupt Heel–Face Turn in #39 go entirely unheeded by Aruto despite him having been direct witness to the latter's history as a Manchurian Agent. It gets Aruto beaten to the brink of death and his Driver seized by Ark-Zero.
• Poor Communication Kills: Notably defied, given the franchise's history with this trope. Aruto is an extremely honest person who publicly reveals the discoveries he makes about the rogue HumaGear situation and his Secret Identity lasts for all of three episodes before he decides to drop it to remain honest.
• Position of Literal Power: Only the CEO of Hiden Intelligence can don the Zero-One Driver to transform into Kamen Rider Zero-One. Accepting the position of CEO allows Aruto to beat up opponents since Episode 1.
• Pungeon Master: Aruto's act specializes in bad puns, and he brings out one or two in every episode.
• Put on a Bus: Doesn't appear in the first part of Zero-One Others due to being sent into space shortly before the film begins.
• The Quisling: In Kamen Rider Outsiders, Aruto is among the stalwart heroes that supported Zein, an authoritarian artificial intelligence that has a zero-tolerance for malice and required humanity's extinction to achieve salvation. The very idea that he, along with the other heroic Riders are willing to sell out mankind to a Knight Templar A.I. to eliminate the villains is basically a betrayal of their duty as Kamen Riders.
• Rage Breaking Point: In the ZAIA Arc during the third match. Aruto already demonstrated he had problems with MetsubouJinrai turning HumaGear that Grew Beyond Their Programming into Magia, but seeing normal HumaGear transform by way of abuse, followed by their destruction at the callous hands of Gai, is enough to make him livid.
• Raised by Robots: When he was young, he was taken care of by the Soreo Hiden HumaGear.
• Refusal of the Call: He's not interested in succeeding his grandfather until he gets involved in a HumaGear attack and asks Is to hand him his Driver. Even after he becomes a Kamen Rider, he's still not actually sold on the position and only does so because he wants to protect people.
• Resigned to the Call: Wasn't particularly interested in being the CEO of Hiden Intelligence, questioning if someone who lives by the punchline should even be in such a predominant position. Unfortunately, being the CEO is the only way he can fight as Zero-One and protect innocents.
• Ripple-Effect-Proof Memory: In Kamen Rider Reiwa: The First Generation, Aruto is unaffected by the timeline changes created by Finis and Another Zero-One. Kamen Rider Zi-O: Over Quartzer implies that Aruto is a creation of Sougo Tokiwa like the Future Riders, who also had this power.
• Say My Name: Everytime Humagears get destroyed, Aruto will yell their name.
• Screw the Rules, I'm Doing What's Right!: Ultimately forgoes Is's advice to hide his secret identity from A.I.M.S. in order to prove to them that he's an Honest Corporate Executive who won't hide from them any secrets.
• Secret Identity: Aruto hides his identity from A.I.M.S. at Is's advice...for all of three episodes, before he decides he's had it with secrets and lies. He transforms in front of Isamu as a conscious refutation of this trope, deciding he can't be an Honest Corporate Executive if he keeps secrets.
• Second Place Is for Winners: Double subverted. While he still lost his position at HIDEN Intelligence after the Workplace Competition, his grandfather's specific patenting assured that he still has ownership over what Gai was after in particular, leaving him free to use his resources to create HIDEN Manufacturing and continue their battle.
• Signature Sound Effect: In some episodes, when he attempts to make a joke towards anyone he meets, there are comedic percussion instruments played during this moment, befitting his comedian nature.
• Sitcom Arch-Nemesis: He considers Fukkinhoukai Taro as his personal rival in comedy for not only taking his job back in #1 but also being better at making people laugh. Though the whole thing where he becomes a Magia and has to fight him as Zero-One is a different story.
  • Even when Gai became his regular Arch-Nemesis, he ultimately ends up being the one to humiliate him more.
• Start My Own: Starting from #30, Is creates a brand new company named HIDEN Manufacturing for him, with him as the president, with the primary purpose to rebuild and protect HumaGears following Gai Amatsu's recall.
• Took a Level in Badass: Aruto was already fairly competent in the beginning of the series, but he goes through several more levels after fighting MetsuboJinrai.net and Gai Amatsu. To boot, he went from getting his ass kicked by Gai to serving multiple ass-whoopings in return with ease. Not to mention, his business savvy gets a major boost after being the CEO of Hiden Intelligence and Hiden Manufacturing.
• Tough Room: Most don't laugh at his jokes...except for Isamu.
• Trauma Conga Line: As a child, he lost both his biological father and his surrogate robotic one within the span of a few years. The events of the show proper are far from kind to him either, with every victory matched by a terrible setback. Even when he undoes those setbacks, as shown with restoring Is and returning to Hiden Intelligence, the post-series finds a way to sully that by promptly killing and/or depowering almost every single one of his Kamen Rider allies.
• Unexpected Successor: He was the last person to ever think his grandfather would name him as the next CEO of Hiden Intelligence.
• Universally Beloved Leader: In #16, the higher-ups of Hiden convene to determine whether or not to remove Aruto as President. When they vote for Aruto's removal, no one other than Jun raises his hand. It also speaks volumes about the executive board when after ZAIA buys out Hiden Intelligence, most of them resigned instead of choosing to be demoted. Sanzo even asked Aruto to reconsider leaving the company and instead work as a lower-ranking member. Notably, even a large number of the villains have respect for him.
• Will Not Tell a Lie: Aruto is a very honest person and the fact Hiden Intelligence attempts to cover things up seriously rubs him the wrong way. Thus whenever he has a choice, he will tell the truth.

Tropes exclusive to him as Zero-One

Tropes exclusive to him as Kamen Rider Zero-One

Progrise! To-bia ga Rise! Rising Hopper!
A jump to the sky turns to a Rider Kick.

Progrise! Initialize! Realizing Hopper!
A Rider kick to the sky turns to take off toward a dream.

Progrise!
The rider kick increases the power by adding to brightness.
Shining Hopper! When I shine, darkness fades.

Progrise!
Warning, Warning. This is not a test.
HybridRise! Shining Assault Hopper!
No chance of surviving this shot.

Progrise!
Let's Rise. Le-Le-Let's rise.
Metal Rise!
Secret material: Hiden Metal.
MetalCluster Hopper!
It's high quality.

Progrise! Hell's energy has destroyed the world.
Hellrising Hopper
Heaven or Hell... It doesn't matter.

• 11th-Hour Superpower: Aruto only obtains Realizing Hopper in the very last episode, as his final rejection of The Power of Hate that was driving the conflict of the final arc. He gets to keep it for the movies and spinoffs, though!
• Ability Mixing: Shining Assault Hopper is made possible thanks to Aruto combining the Assault Grip from the Assault Wolf Progrise Key with the Shining Hopper Progrise Key, creating a form that has both Shining Hopper's incredible speed and Assault Wolf's incredible power. As an extra bonus, both Zea and the Ark work together to create the armor.
• Absurdly Sharp Claws: Flaming Tiger form gives Zero-One the Tiger Gauntlets, a pair of claws that also have ports in the palms that can release streams of flames. Freezing Bear also has its own pair of claws called the Bear Gauntlets, which also has similar capabilities as Flaming Tiger.
• Advertised Extra: Flying Falcon form, which was the first additional form advertised and released in the toyline and the one used in Aruto's early appearance in the Zio film. In the show proper it gets used twice, and then the key is stolen and used by Jin for the entirety of the rest of the first quarter. By the time it's retrieved the initial element forms are completely outdated in the face of Shining Hopper and then Metal Cluster Hopper so it's used one final time so Thouser can take it's data and then never touched again for a total of 3 uses in the entire show. In fact it's the only one of Zero-One's initial set of forms that isn't used in Reiwa Generations because it takes place when Jin still has it.
• An Ice Person: It's in the name of Freezing Bear. With his Bear Claws, Zero-One can generate and manipulate ice from the palms and tear through everything.
• Animal-Themed Superbeing: The Progrise Keys that provide him the superpowered suits are based on animals, and each one has a specific specialty based on that animal. To provide two examples, Zero One's base form is Rising Hopper (grasshopper) with a "Jump" ability that allows him to jump to enormous heights, and one of his side forms is Flying Falcon (falcon) with a "Wing" ability that allows him to fly. The primary, grasshopper themed Progrise Key, in particular, goes through several iterations, including a dangerous MetalCluster Hopper that utilizes a swarm of nanomachine locusts.
• Artifact of Doom: The Hellrising key was made by the main antagonist of REAL×TIME, using a bootleg Thousand Jacker and the stolen Zero-Two key to create a new Progrise Key designed to destroy the world. As such, not only is it filled to the brim with evil emotions similar to MetalCluster and the Ark, using it makes Aruto go mad and badly wrecks his body since it was never meant to be used as a Rider form, let alone by a human.
• The Berserker:
  • When first used, MetalCluster Hopper is under the direct control of the Ark, which puppeteers Aruto while he struggles against it. Aruto's resistance doesn't mean much due to the abilities of the form, since the Ark prefers to attack by using the swarm of locusts that form the suit rather than with physical blows. The result is an unusual case of a berserker form that doesn't have to move to slaughter everything around it with brutal efficiency. On later uses of the form prior to its severance from the Ark, the Ark does opt for moving around, in a style that would be right at home in The Shining.
  • Hellrising Hopper is even worse in this regard; Aruto experiences agonizing pain when using it due to the negative emotions saturating the Progrisekey, a more amplified version of the stress he undergoes as Ark-One. It causes him to attack Kamen Rider Eden with vicious brutality, and he is only stopped from using a Finishing Move on Eden thanks to Is's intervention.
• Blade Below the Shoulder: Biting Shark form trades some of Zero-One's physical power for access to blades on all four limbs called the Shark Gauntlets and Shark Greaves. While its abilities are best suited to fighting underwater, on land it still stands out in situations where slicing attacks are a necessity.
• Chrome Champion: MetalCluster Hopper is pure silver (with a few bits of chartreuse here and there) and has the strength to manhandle Thouser even after Aruto takes control of it back from the Ark.
• Cool Sword:
  • The Attache Calibur. It has the ability to charge energy within the blade by folding the blade in and out to perform a Sword Beam. Loading Progrise Keys into the sword will enhance the energy based on the Progrise Key used and the sword becomes stronger when combined with the Progrise Hopper Blade.
  • The Progrise Hopper Blade. It can use MetalCluster Hopper's Cluster Cells to augment its attacks, and can form a double-bladed weapon by combining with the Attache Calibur. Being made with the hopes, trust and joy of every HumaGear Zero-One's helped, it not only protects him from the Ark and lets him use MetalCluster Hopper's power himself, but also lets him counter the Ark's hacking and undo the effects of Zetsumerisers on hacked HumaGears and even Raiders too.
• Combat Clairvoyance: Shining Hopper and Shining Assault Hopper are both capable of this, relying on Zea's calculation abilities to choose the next course of action.
• Combat Parkour: Zero-One is capable of doing flips in battle thanks to Rising Hopper's jumping abilities. Zero-One is also capable of doing jumps and flips in Hopping Kangaroo as well.
• Confusion Fu: As Shining Hopper can calculate and change tactics at the last second, predicting Zero-One's next move becomes impossible.
• Dark Is Not Evil:
  • Compared to the soft-angled and primarily white color-schemed Vulcan and Valkyrie, Zero-One's dark suit, harsh edges, and red eyes would look rather menacing in certain circumstances.◊ However, Aruto remains a heroic figure all the same.
  • In the hands of another other person, Hellrising Hopper would be a Rider form capable of ending the world ala Kuuga Ultimate. In the hands of Aruto, however, it's used for the purpose of defending it.
• Deadly Upgrade:
  • Much like Drive's Type Formula, Shining Hopper form grants Zero-One more speed and strength than his body is capable of handling, with extended usage causing him to collapse from the strain.
  • Metal Cluster Hopper is a much straighter example, being similar to berserker forms like Build's Hazard Form or OOO's PuToTyra Form. Similarly to Hazard Form, using another auxiliary device allows him to control its power—in this case, the Progrise Hopper Blade.
  • Hellrising Hopper isn't designed for use by a flesh and blood human body, similar to forms like Assault Wolf. Unlike Assault Wolf, the safeties are so lax that just throwing a punch causes Aruto to break his arm, after which the suit agonizingly forces it back into shape. The form also builds up energy with each attack, and at one point Aruto literally explodes while he's manhandling Eden, effectively turning him into an Action Bomb.
• Discard and Draw: The Progrise Hopper Blade causes MetalCluster Hopper to restrict the ability to use the Cluster Cells, which were so powerful that Zero-One only needed to stand still and they would do all the fighting for him. In exchange, however, he gains a shapeshifting weapon that possesses enough destructive power to bring Thouser to his knees, while also having other uses for defensive and utility purpose to aid him in battle (i.e shield with varying size, a distraction or footholds for airborne battle.) and can turn Magia back into their normal HumaGear form.
• Doppelgänger Spin: The Shining Hopper and Shining Assault Hopper forms can create holographic digital images of Zero-One that can be used to distract the opponent and he can pick one of the images in motion to use for his next move.
• Drone Deployer: Shining Assault Hopper has a "Shine System" that deploys the Shine Cryster which acts both as an Attack Drone and an Orbiting Particle Shield. MetalCluster Hopper, when under the Ark's control, takes things a step further by making the entire suit out of drones called Cluster Cells.
• Dual Wielding: Zero-One in Metal Cluster Hopper Form can wield the Attache Calibur and Progrise Hopper Blade in both of his hands (and possibly the Authorise Buster assuming Fuwa isn't using it).
• Evil Counterpart: While it is used for a heroic purpose, if only very briefly, the Hellrising Hopper Progrisekey was made using the Zero-Two Progrisekey as a base, and as stated by S, it was designed for the sole purpose of ending the world. In terms of appearance, Hellrising Hopper looks like a red and black Shining Assault Hopper.
• Explosive Overclocking: Realizing Hopper's strength comes from continuously generating ultra-high output data from its Progrisekey then compressing it into a format that can be read by the Zero-One Driver. This gives it far more power than the Driver should normally be capable of producing, but at the cost of overloading it and reducing the amount of time that Aruto can remain transformed.
• Finishing Move: Depending whether from his Driver or an auxiliary weapon.
  • Zero-One Driver
    • Rising Impact: In Rising Hopper form, Zero-One runs up the the enemy and launches it up in the air via a kick before performing two powerful rider kicks: one to thrust the enemy back downward, and the other to destroy it.
    • Flying Impact: In Flying Falcon Form, Zero-One sprouts a pair of mechanical falcon wings from his back and flies toward the target before grabbing them with his legs and lifting them into the air. He then throws the enemy and delivers a Rider Kick covered in magenta energy.
    • Biting Impact: In Biting Shark form, Zero-One repeatedly slashes the enemy with the shark fins on his arms and legs, projecting chartreuse yellow and teal crescents in the process, before sending them sky high, projecting several teal energy shark fins from his arms, and slashing the enemy with them.
    • Flaming Impact: In Flaming Tiger form, Zero-One projects a ring of fire before charging through them and delivering powerful slashes at the enemy with the Tiger Gauntlets.
    • Freezing Impact: In Freezing Bear form, Zero-One freezes the enemy into a glacier before chopping them in two.
    • Breaking Impact: In Breaking Mammoth form, Zero-One detaches one of the Progrise Keys mounted on its arms before kicking it down towards the enemy and crushing them with it.
    • Shining Impact: In Shining Hopper form, Zero-One delivers a pair of high-speed kicks. A more powerful version is called the Shining Mega Impact, which allows him to delivers a series of high-speed kicks that propel the enemy into the air before landing more kicks, destroying the enemy.
    • Shining Storm Impact: In Shining Assault Hopper, Zero-One jumps and performs a Rider Kick charged with yellow and blue energy at high speeds.
    • Metal Rising Impact: In MetalCluster Hopper, Zero-One turns his swarm of Cluster Cells into constructs that assist in his Rider Kick. This can consist of forming duplicates that do the kick for him, creating a construct to block the opponent's counterattack and then using it like a giant drill, or a mix of both.
    • Hopping Impact: In Hopping Kangaroo, Zero-One channels the Progrise Key's Rider Model into a punch, then kickflips his opponent into the air, where he unleashes a barrage of punches onto them, before winding up and throwing one last powerful punch at them.
    • Realizing Impact: As Realizing Hopper, he performs a more powerful version of his Rising Impact finisher, sending the opponent up into the sky with a Rider Punch before assaulting his target with a barrage of kicks before sending them downward, then delivering a final Rider Kick to destroy them.
    • Hellrising Impact: Zero-One, in Hellrising Hopper, gathers energy in his fist as he runs and delivers a rider punch.
  • Attache Calibur
    • Rising Kaban^note Dispatch/Encased, depending on the fansub. Strash: By inserting the Rising Hopper Progrise Key in his Attache Calibur in Blade Mode, yellow cyber-like energy is emitted from the Attache Calibur's blade before Zero-One delivers a powerful slash.
    • Biting Kaban Strash: By inserting the Biting Shark Progrise Key into it while it's in Blade Mode, teal cyber-like energy is emitted and makes projections of multiple shark fins before Zero-One delivers a powerful slash.
    • Flaming Kaban Dynamic: By inserting the Flaming Tiger Progrise Key into it while in Blade mode then charge it in Attache Mode then switch back to Blade Mode, Zero-One delivers a series of red fiery slashes.
    • Metal Rising Kaban Dynamic: By inserting the MetalCluster Hopper Progrise Key in the Attache Calibur's Blade Mode after opening it from its Attache Mode, Zero-One delivers two powerful metallic slashes at his targets.
  • Authorise Buster
    • Buster Bomber (Rising Hopper): By inserting the Rising Hopper Progrise Key into the Authorise Buster in its Axe Mode, Zero-One performs a slash charged with yellow energy.
    • Progrise Dust (Rising Hopper): By scanning the Authorise Buster in its Gun Mode with the Rising Hopper Progrise Key, Zero-One can fire bullets charged with yellow energy.
    • Zero-One Dust: By scanning the Authorise Buster in its Gun Mode on his Hiden Zero-One Driver, Zero-One can fire a energized bullet that takes the shape of a grasshopper before striking the enemy.
    • Buster Dust (Freezing Bear): By inserting the Freezing Bear Progrise Key into the Authorise Buster in its Gun Mode, Zero-One shoots an energy polar bear construct.
    • Zero-One Buster Bomber (Biting Shark): By inserting the Biting Shark Progrise Key into the Authorise Buster Axe Mode, and then scanning it on the Hiden Zero-One Driver, the Authorise Buster generates two projections of several energy shark fins every time its swung, which deliver a powerful "bite" to the target.
    • Buster Bomber (Breaking Mammoth): By inserting the Breaking Mammoth Progrise Key into the Authorise Buster in its Axe Mode, Zero-One fires 2 constructs resembling Mammoth Legs at the opponent, crushing them, then follows up by launching a construct of a mammoth's tusk at the opponent.
  • Progrise Hopper Blade
    • Progrising Strash: Zero-One pulls the trigger of the Progrise Hopper Blade multiple times to give it an edge made from Cluster Cells, then swings it, firing the edge at the opponent. It has the ability to destroy ZetsumeRisers completely, returning Magia back to their original HumaGear form.
    • Ultimate Strash: Zero-One combines the Attache Calibur Blade Mode to the Progrise Hopper Blade and scans the Progrise Hopper Blade on the Zero-One Driver, creating a large edge of Cluster Cells on the Progrise Hopper Blade. With one swing, Zero-One sends that edge flying to strike the opponent, and uses another two swings to detonate it and attack the opponent with two electric-green slashes, dealing a tremendous amount of damage.
    • Final Strash: Zero-One scans the Progrise Hopper Blade on the Zero-One Driver, causing it to release a large swarm of Cluster Cells upon swinging, which form into several large spikes as they fly into the targets. Alternatively, after scanning the Progrise Hopper Blade, Zero-One summons three Cluster Cell shields to defend from incoming attacks.
• Flight: Flying Falcon grants Zero-One the ability to fly in antigravity fashion: unlike a real falcon, he can hover.
• Fragile Speedster: Flying Falcon trades much of Zero-One's physical strength for the power of Flight.
• Force and Finesse: Relative to every other Rider:
  • Compared to the A.I.M.S. Riders, whose Progrise Keys for the most part just directly increase their physical abilities, Zero-One's Keys tend to keep his physical abilities about the same as his base form. Instead, he gains a wide array of superpowers that are useful in specific circumstances, giving him the flexibility he needs to strike at a foe's weakness. When he starts gaining more general-purpose superpowers, they're ones like Doppelgänger Spin and Pest Controller that require a lot of skill to use effectively, whereas upgrades like Assault Wolf simply load Vulcan up with more armor and more guns.
  • Compared to the MetsubouJinrai.net Riders, whose rough and heavy armor has a deliberate lack of elegance to it, Zero-One's armor is sleek and lightweight. This even applies to himself as Zerozero-One, who otherwise shares the aesthetic of the other Force Riser users.
  • Compared to Thouser, who's Unskilled, but Strong, Zero-One is Weak, but Skilled. Thouser has a massive advantage in every physical parameter, and the Thousand Jacker lets him use every other Progrise Key's powers with the push of a button, but he doesn't use those advantages effectively due to a lack of talent and experience.
• Forced Transformation: How Zero-One obtained MetalCluster Hopper. Gai forcibly inserts the Progrise Key into the Zero-One Driver, which also proceeds to hijack his consciousness and turn him into The Berserker.
• Glass Cannon: Flaming Tiger trades some of Zero-One's defense for further increase in power.
• Godzilla Threshold: The Hellrising Hopper Progrisekey is this. Initially, Aruto attempts to use it in order to defeat S, but the second he accesses the form, he attempts to destroy the Progrisekey while it's still inside the Driver as it drives him mad.
• Healing Factor: Hellrising Hopper grants Aruto one, which is the only way he can survive its effects on his body, as it grants the usual strength of a Rider without the usual Required Secondary Powers.
• Healing Shiv: As a side effect of being made to erase the Ark's control over MetalCluster Hopper, the Progrise Hopper Blade can restore a Magia to their HumaGear form, even if they were wearing a ZetsumeRiser. It also works on RaidRisers.
• Hammerspace: What Hopping Kangaroo grants Zero-One, allowing him to literally pull a HumaGear from the pocket on his chest to pull a Combination Attack on his opponent.
• In a Single Bound: Rising Hopper allows Zero-One to jump to enormous heights. He actually underestimates this ability in its first usage, and ends up landing on top of a roller coaster platform dozens of feet in the air just from trying to jump over his opponent's attack.
• Informed Attribute:
  • For the first time in many years, Rising Hopper's jumping power is not this trope. Zero-One frequently displays a degree of superhuman leaping skills in regular combat that most of the Heisei Riders reserved near-exclusively for when delivering a Rider Kick. In this regard he's closer to the Showa Riders, who more commonly exhibited similar jumps, but with the benefit of modern special effects.
  • Biting Shark's official stats focus on its proficiency in deep-sea combat, but this is not what it's developed for in the show, and its debut fight takes place in water that's barely ankle-deep. Emphasis is instead placed on its multitude of bladed weapons and their utility against opponents trying to restrain Zero-One.
  • Breaking Mamoth, Aruto's Mini-Mecha form, was designed to protect people from large-scale disasters, effectively making it a rescue robot of sorts. The only times Aruto ever uses it is to combat the Magia, which are usually one-on-one fights in an open area.
• Jack of All Stats: Early on, Zero-One's main strength is his versatility through various form changes, in contrast to Vulcan's firepower and brute strength of Vulcan or Valkyrie's speed and quick reflexes. Once the upgrade train starts rolling and Valkyrie is left behind, Zero-One becomes the new Fragile Speedster by comparison to the other Riders at his strength level.
• Lethal Joke Character: Aside from its goofy impressions, Hopping Kangaroo can prove to be a helpful form as it gives Zero-One good punching power and agility as well as being able to summon HumaGear allies to help him out in battle for different situations.
• Lightning Bruiser: Zero-One's progressively more advanced Hopper Keys play this role to the rest of his forms. Each is the strongest form in every regard of any Rider when it first appears, but gradually falls into being the new baseline for performance as stronger threats appear.
• Logical Weakness:
  • As amazing as Shining Hopper's ability to change attacks in an instant via Flash Stepping is, it won't matter if the opponent is either fast enough to react to the sudden changes or tough enough to endure the attacks outright, both traits that Thouser possesses. However, the more powerful strength and abilities from MetalCluster Hopper are able to overpower Thouser with ease.
• Made of Iron: Quite literally. Zero-One MetalCluster's body is composed of Hiden Metal, a theoretical material originally conceived by Hiden Intelligence that can freely change its hardness, plasticity, and density, making it incredibly good armor.
• Mid-Season Upgrade: From Rising Hopper to Shining Hopper, Shining Assault Hopper, and then MetalCluster Hopper.
• Mighty Glacier: Breaking Mammoth obviously qualifies due to being a Mini-Mecha, and thus extraordinarily powerful but also a giant target. Of Zero-One's more basic forms, Freezing Bear possesses the thickest armor and highest degree of raw physical strength.
• Mini-Mecha: Essentially what Breaking Mammoth is. It's a mecha that Zero-One can use when fighting giant opponents like the Gigers.
• Mythology Gag:
  • Zero-One has a similar name and theme to the very first Kamen Rider, as the original was named "Ichigou" ("#1") and also patterned after a grasshopper.
  • His simplistic design also shares similarities to the design of Kamen Rider Kuuga, the first Kamen Rider of the Heisei Era.
• New Powers as the Plot Demands: The Hiden Intelligence satellite is capable of fabricating entirely new Progrise Keys to help counter enemy tactics. #3 implies, however, that the Keys are actually being recreated rather than invented, and that Korenosuke took them from Daybreak Town during or after the event that destroyed the city.
• Painful Transformation: Hellrising Hopper doesn't simply slap itself onto Aruto like other forms do. Rather, the form is made via the Ride Model fusing with him, resulting in the armor actually growing out of his body. Unlike S, who has a similar transformation sequence as Kamen Rider Eden, Aruto is in utter agony during the process. The fact that Hellrising Hopper is driving him insane does not help matters.
• Pest Controller: Under the Ark's control, MetalCluster Hopper evolves on the Attack Drones of Shining Assault Hopper by having the entire suit be made out of a swarm of locusts that can reshape themselves into any form the Ark wishes and possess enough destructive power to defeat a Raider within seconds. This power is lost when Aruto retakes control, as the swarm is trapped in the Progrise Hopper Blade.
• Phlebotinum Breakdown: An engineered version. #23 begins with Aruto discovering that the MetalCluster Hopper Key had some kind of effect on the Zero-One Driver that makes it not authorize any of his normal Progrise Keys anymore. This means that at the moment, Aruto's only choices are to use the highly dangerous and unstable MetalCluster Hopper form or to abandon being Zero-One entirely.
• Playing with Fire: It's in the name of Flaming Tiger. This form gives Zero-One flame powers and he can use the ports of his Tiger Gauntlet's palms to release streams of flames and enhance the tip of the claws to make them hotter.
• The Power of Friendship: Hopping Kangaroo allows Zero-One to summon a HumaGear that he saved and he can learn special moves based on their occupation. When the chosen HumaGear does an action, Zero-One learns and does it with them.
• The Power of Hate:
  • The view inside the Ark and later a direct analysis of the MetalCluster Hopper key makes it abundantly clear that the MetalCluster Hopper form is powered by this, specifically the Ark's hate. It is later replaced by The Power of Friendship from all the HumaGears Aruto has helped between #1 and #24.
  • Hellrising Hopper isn't much better than MetalCluster Hopper, as it slowly drives Aruto insane the longer he uses it.
• Powers Do the Fighting: As MetalCluster Hopper, during its first appearance, the Ark barely moves in a fight thanks to its metal locust drones who attack for it.
• Rapid-Fire Fisticuffs: Hopping Impact allows Zero-One to deliver a barrage of punches at high speeds.
• Red and Black and Evil All Over: Hellrising Hopper is more or less a red and black version of Shining Assault Hopper and is as powerful as it is menacing. Downplayed in that, since the person using it is Aruto, it's more a case of a darker Red Is Heroic.
• Red Eyes, Take Warning: Normally inverted, as Zero-One's primary forms all have red eyes aside from MetalCluster Hopper, a berserk form that has green eyes. However, in moments of extreme anger, Shining Assault Hopper's chestpiece can switch from its usual blue to a glowing red as the Ark half of the form threatens to overpower the Zea half.
• Sinister Scythe: Breaking Mammoth features two Graingots, tusk-like scythes that Zero-One can use as weapons. When not in use, they're stored on the Mammoth Breast. In his first battle using it, he demonstrates the ability to steal the identical weapons from the chest of a Giger.
• Spanner in the Works: In Real x Time, Aruto attempts to destroy the Hellrising Hopper Progrisekey while its inside the Zero-One Driver so as to prevent S from using it and complete his plans. Sadly for Aruto, the Progrisekey's influence and S' interference prevents him from doing just that.
• Speed Echoes: Zero-One in Shining Hopper form creates digital after-images when using his speed powers.
• Stealth Pun: Due to being homophones in Japanese, Aruto's last form can be both Realizing Hopper and Re-Rising Hopper, both its own thing and a power-up of Rising Hopper.
• Super-Speed: When using the Rising Impact finisher in Rising Hopper form, Zero-One gains a temporary speed boost to perform the Rider Kick finisher in rapid motion. When using Shining Hopper form, Zero-One is given a permanent speed boost that he can use freely and he goes even faster when using the Shining/Shining Mega Impact finisher. Once Shining Assault Hopper is fully powered up, Zero-One's speed cranks up even further!
• Sword Beam: By using a Full Charge in Attache Mode and then switching it to Blade Mode, Zero-One can use a Kaban Strash that unleashes a wave of energy from his sword. The Progrise Hopper Blade also has this ability by launching metal spiked waves that form from the blade. And when combining both swords together into a Double Weapon, Zero-One can create large energy waves to detonate the metal spiked waves.
• Taught by Experience: Initially, Zero-One started off as Unskilled, but Strong, relying on his various forms to stay in a fight. As he gains more battle experience, he eventually becomes skilled enough to fight in his base form against much stronger opponents without using any of his super forms until he needs to strike a decisive blow against the enemy.
• Throwing Your Sword Always Works: Zero-One in Shining Assault Hopper form can throw his Authorise Buster.
• Took a Level in Badass:
  • Despite Thouser being virtually stronger than Rising Hopper in every way, the latter form manages to push Gai back and puts up an even fight before Aruto decides to switch to MetalCluster Hopper. Keep in mind that Rising Hopper is Zero-One's base form, meaning Aruto managed to push Gai back not through a difference in power, but rather a difference in combat prowess like Horobi before him.
  • Rising Hopper receiving an upgrade in the form of Realizing Hopper by way of Soreo Hiden and the Zero-Two Driver. While it is weaker than Zero-Two, Realizing Hopper is strong enough to match Horobi's Ark-Scorpion.
• Tron Lines: Zero-One's black undersuit has red lines going through it.
  • Shining Hopper's, and by extension Shining Assault Hopper's, undersuit replaces the red lines with gold ones. Fitting for a form that uses brightness.
• Weapon Specialization: Each of Zero-One's major forms has a weapon associated with it, though he can use the weapons in other forms if he wants:
  • Rising Hopper and other basic forms have the Attache Calibur, a Cool Sword that transforms from a briefcase. By inserting a Progrise Key into the slot at the bottom, he can infuse the energy from the Progrise Key into the sword to enhance its state.
  • When using Shining Hopper or Shining Assault Hopper, Zero-One wields the Authorise Buster, a Mix-and-Match Weapon that can switch between axe and blaster modes.
  • MetalCluster Hopper gains the Progrise Hopper Blade, a sword that can use MetalCluster Hopper's Cluster Cells to create sharp edges to slash with or fire. It also doubles as a Healing Shiv that exists in opposition to the Ark's malice, capable of restoring Magia to HumaGear form without needing a prepared backup. It can be combined at the hilt to the Attache Calibur to create a Double Weapon.
• The Worm That Walks: The Ark takes this form as MetalCluster Hopper, as the armor is composed of metal locust drones that constantly swarm on and off the undersuit.

Tropes exclusive to him as Zerozero-One

Tropes exclusive to him as Kamen Rider Zerozero-One

Force Rise!
Rising Hopper!

A jump to the sky turns to a Rider Kick. Break Down.

• Awesome, but Impractical: Zerozero-One's raw stats are somewhat superior to Zero-One's base form, and it can temporarily gain the same Super-Speed as Shining Hopper by using a finisher. However, the extra armor plates weigh the suit down and hinder Aruto's fighting style, and more importantly the Force Riser is excruciating to use, making it an inferior option in every regard the moment Zero-One acquires Shining Hopper.
• Clipped-Wing Angel: Like Kamen Rider Joker or Drive Type Super Dead Heat, Zerozero-One is a kitbashed emergency form that was used only because Zero-One's regular powerset isn't available. The transformation itself is visibly agonizing, and Zerozero-One lacks Zero-One's array of tools and more powerful forms.
• Dark Is Not Evil: Although it is a Force Riser-based form and shares Horobi and Jin's aesthetics, Aruto is still heroic nonetheless.
• Flawed Prototype: While the Rising Hopper Progrise Key is still the final product, the ForceRiser that Zerozero-One uses is a modified prototype Driver that was never meant for human use, and it shows between the lack of weapons and the continual Heroic RRoD it inflicts on the wearer.
• Finishing Move: Zerozero-One has two finishers, depending on how many times he's pulled the Force Executor:
  • Rising Dystopia: After pulling the Force Executor once, Zerozero-One gains the ability of Super-Speed to match Ichi-Gata's own super speed.
  • Rising Utopia: After pulling the Force Executor twice, Zerozero-One jumps up and delivers a glowing green energy-covered Rider Kick.
• Force and Finesse: Aesthetically, Zerozero-One's heavy armor appears to emphasize the use of brute strength compared to Zero-One's sleek and lightweight design. In practice, Zero-One is both stronger and faster than Zerozero-One.
• Fragile Speedster: Zerozero-One's Rising Dystopia allows it to run at high-speeds akin to Kabuto's Clock Up, but it's neither strong nor sturdy.
• Lightning Bruiser: By ForceRiser standards, Zerozero-One managed to keep up with Ichi-Gata despite its Clipped-Wing Angel status.
• Loophole Abuse: Another Zero-One's alteration of history prevents Aruto from transforming using his real Driver, but the Force Riser that existed before the point when history was altered isn't affected. Plus, it allows him to become what basically and technically is a different Rider. As in, he just lost his Zero-One power, but nothing stops him from becoming Zerozero-One instead.
• Painful Transformation: Aruto screams and contorts in agony the first few times he changes into this form.

Tropes exclusive to him as Zero-Two

Tropes exclusive to him as Kamen Rider Zero-Two

Zero-Two Rise!
Road to glory has to lead to growin' path to change! One to two!
Kamen Rider Zero-Two!
It's never over!

• All Your Powers Combined: Instead of having all the powers of all the Progrise Keys in the series, Zero-Two takes all of the various Hopper forms and puts them together. It has an improved version of Ichi-Gata's energy scarf, the speed from previous Hopper forms, predictive abilities of Shining Hopper, and the strength and defensive power from Hiden Metal armor of Metal Cluster Hopper. Thanks to the Progrise Hopper Blade, it can also make Cluster Cell constructs just like Metal Cluster Hopper can.
• Bishōnen Line: In contrast to previous Rider Super Mode forms, which tend to be their most complex form design wise, Zero-Two is simply exactly what its name would suggest: a sleeker, more advanced version of Zero-One's base form with red and silver parts in contrast to the far busier and spikier Shining Hopper, Shining Assault Hopper, and Metal Cluster Hopper.
• Brought to You by the Letter "S": The Zero-Two Driver has a big red "2" on its front in its inactive state, while the "scarf" on Zero-Two's neck is formed from the number "02".
• Combat Clairvoyance: Similar to Zero-One Shining Hopper and Shining Assault Hopper, Zero-Two can calculate the opponent's next moves and counterattack accordingly, but at speeds that make previous forms look like they're moving in slow motion. The equipment list for each form states that Shining Hopper tests 25,000 scenarios per prediction, while Zero-Two tests 2 trillion.
• Contrasting Sequel Main Character: Zero-Two provides an interesting contrast for pretty much the entire Heisei era final form design. The vast majority of Heisei Riders' final forms are much more heavily armored (bordering on over-designed at times) and have lots of gold and/or silver accents. On the other hand, Zero-Two simply looks like a modified version of Zero-One's first form with a few different color accents.
• Discard and Draw: Ark-Zero confiscates the Zero-One Driver, only for Aruto, Is, and Zea to collectively design the Zero-Two Driver in its place.
• Flash Step: Zero-Two is capable of moving extremely fast, to the degree that he can assault the target from multiple angles in the blink of an eye.
• Finishing Move: Zero-Two Big Bang: Zero-Two performs a series of high-speed kicks covered in yellow and red energy. The final kick will project a giant "02" the instant it connects with the target and creates a galaxy spiral as the enemy explodes.
• Fusion Dance: A variation. Basically, Satellite Zea's A.I. is working with Aruto directly instead of Aruto's consciousness being sent to Zea.
• Man of Kryptonite: Various aspects of the suit are designed for the expressed purpose of countering Ark-Zero. His hands are designed explicitly to counter the Ark's liquid metal form and he's designed to not only be stronger, but to have the processing power to out predict the Ark's own and thus counter it's most powerful aspect. This is best shown by the fact he's capable of physically tearing Ark-Zero out of its hosts.
• Master of All: Stats-wise, Zero-Two outmatches all of Zero-One's previous Lightning Bruiser forms. It's faster than Shining Hopper and Shining Assault Hopper, and stronger than MetalCluster Hopper; it can take blows from Ark-Zero that would've decimated any other Rider, and is capable of staggering Ark-Zero with simple punches and kicks.
• Mid-Season Upgrade: Unlike past Final Forms, which are basically ultimate upgrades of the same Rider, the show ditches that in favor of following the Gundam-style of obtaining upgrades (where the hero transfers from his old unit to a new, superior one). Here, Aruto transfers from Zero-One to Zero-Two. He is also the first lead Rider to do this.
• Mythology Gag:
  • Just like Zero-One, Zero-Two has a similar name and theme to the deuteragonist of the very first series of the franchise, as the original was named "Nigou" ("#2") and also patterned after a grasshopper, with a suit featuring red gloves and heavier silver accents. In fact, one of the promotional images shows him performing Nigou's transformation pose, albeit mirrored. It culminates in the REAL×TIME movie, where Is inherits the Zero-Two belt to fight alongside Aruto, effectively becoming the new Double Riders (complete with a "#1 of Skill, #2 of Power" dynamic).
  • As a final form, it harkens back to Ultimate Kuuga and Shining Agito, the first Final Forms, in many ways. Though the Zero-Two Driver is treated as an entirely new belt, visually and functionally, it's just the Zero-One Driver with a new faceplate like the Rising Arcle and the Dragon's Nail-equipped Altering, though a special Progrise Key is still used. Similarly, like Ultimate and Shining themselves, as mentioned above, Zero-Two's design is still primarily visually similar to its base form, slightly more armored without sacrificing the original sleek look, rather than a complex and often very busy design like other Final Forms.
• Out of Focus: Because of the Covid required plot changes to the show which lead to Aruto not using it very much and Is later getting it and using it in it's most recent prominant appearances while Aruto instead was regulated to Zero-One Zero-Two is probably one of the least focused on Rider Final Forms in recent history. Despite being Aruto's official Final Form it more or less got lost in the shuffle of all the forms he has and most of it's merchandise features the Is version (which has a more feminine build and is placed in her "Secretary pose") instead.
• Red Is Heroic: This form has the color red as a more predominant feature when in comparision to Zero-One, with those parts in particular paying homage to the first Kamen Rider of the franchise.
• Scarf of Asskicking: Similar to Ichi-Gata, Zero-Two also generates a scarf made out of red energy called Zero-Two Streamer.
• Super Mode: Despite being counted as a separate Rider, Zero-Two is still considered as Zero-One's Final Form since it follows most tropes common with it, such as appearing in either 2nd half or last third/quarter of the series and usually, the strongest in the user's arsenal in the TV series. It's reinforced with Decade Complete Form 21 having Zero-Two as the Final Form card^note The primary criteria of which form is considered the Final Form, with capital F, is generally the toys, primarily the form's Transformation Trinket being released in the show's final quarter and being interactable with the primary DX belt. Though the Zero-Two Driver is treated as a separate belt in-universe, it really is just the Zero-One Driver with an attachment plate that was originally released as a separate add-on packed with the Zero-Two Progrise Key. Thus, Ark One below is not treated as Zero-One's official Final Form, as the Ark Driver 1) is a Premium Bandai item released months after the end of the show, thus it isn't necessarily merchandise for the kids anyway, and 2) actually is a separate belt that has no interaction with the base Zero-One Driver..
• Super-Speed: The speed of Zero-Two exceeds all forms of Zero-One and Zerozero-One, moving so fast that he instantly reappears after each of his high speed attacks. Kamen Rider Ark couldn't even keep up with his calculations and gets worn out as a result.
• Superior Successor: Zero-Two was designed by Aruto after the Zero-One forms reached their maximum power; wanting to surpass his grandfather in his own way, Aruto designed Zero-Two as the culmination of humans and AI working together.

Tropes exclusive to him as the Ark's Successor (Unmarked Endgame Spoilers)

"I will never forgive you."

— Aruto's grim declaration against Horobi after him killing Is.

After Horobi murders Is in cold blood, Aruto is pushed past his breaking point. Through As's manipulations, he willingly accepts the remnants of the Ark's power, becoming Kamen Rider Ark-One in order to enact revenge on Horobi.

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• Anti-Hero: Aruto may be on a mission to kill Horobi using the power of malice incarnate, but that is his only goal. When facing his former allies, he would rather avoid fighting them altogether. And when that isn't an option, he merely resorts to non-lethally incapacitating them. When he kills Jin by accident, he starts to have a panic attack.
• Being Evil Sucks: Despite grasping the power of Ark-One with open hands, it's quickly made apparent that wielding it traumatizes and horrifies Aruto, as by the episode's end he's left sobbing while As gives him False Reassurance.
• Break the Cutie: Aruto begins as a man who simply wants to make people smile, then endures a tremendous amount over the course of the series. Ultimately Is's death at Horobi's hands proves to be his breaking point, leaving him a distraught wreck who willingly becomes Ark-One in the name of vengeance.
• Broken Pedestal: The entire reason Aruto's vengenful crusade is such a problem in the first place. Having spent the entire show championing the cause of HumaGears even when everyone else turned on them, Aruto embracing the power of Ark and giving into his negativity risks losing all the goodwill the good guys had built up all show, since it potentially proves Horobi's point that even the greatest of humans is not immune to hatred and if Aruto Hiden will throw everything away for the sake of vengence on one of them then no human can be trusted and risks causing the whole war Horobi's trying to start in the first place.
• Contrasting Sequel Protagonist: The Light Is Not Good Ark-One is this to the Dark Is Evil Oma Zi-O, as both are the forms the main characters have and eventually take on that symbolizes their status as a Fallen Hero and both are formed by the protagonist willingly embracing dark powers born from witnessing the death of a loved one; Geiz for Sougo and Is for Aruto. However, Oma Zi-O, which combined the powers of all Heisei Riders, originally belonged to Sougo's villianous future self which the present Sougo sought to avoid thoroughout his series, while Aruto, who has directly been fighting the Ark and its minions, becomes its host for revenge by using The Power of Hate before and during his time as Ark-One. How they are each dealt with is also notable: Sougo never fully succumbed to the power of Oma as proven when he willingly gave up the power to repair all of the worlds, while Aruto goes through an Heel Realization and allows Ark-One to be destroyed to overcome his malice.
• Cruel Mercy: When Fuwa becomes Ortheros Vulcan to stop him from going after Horobi, Aruto opts to become Zero-Two instead of Ark-One, pulverizes him until the suit can't take it anymore and explodes in his face. Merciful, but hardly a painless way to spare him.
• Cycle of Revenge: Horobi killing Is leads Aruto to become Ark-One in retaliation, leading to Jin dying in an attempt to protect Horobi. Of course, Horobi was already planning to Kill All Humans at that point, so all Aruto did was make Horobi focused on him instead.
• Evil Cannot Comprehend Good: It's strongly implied that while using the suit, Ark-One's face gem gives him the equivalent of a lobotomy and completely ruins his ability to feel doubt, regret, or even happiness as long as it's active. The closest the Ark Driver will get to using Aruto as a meat puppet is to simply go for his brainwaves and invoke this trope. It's good enough.
• Fallen Hero: Zig-zagged. After losing Is, Aruto willingly becomes Ark's vessel and turns from an All-Loving Hero to a vengeful, Unscrupulous Hero as Ark-One, and keeps pressing forward in his revenge quest even after switching to Zero-Two. At the same, it's shown frequently that he regrets his actions and, aside from Horobi, Aruto only fights the other Riders when they attack him first. Full averted in the finale thanks to his pep-talk with his dad. Aruto lets go of the hatred he has for Horobi and decides to fight him out of catharsis - not revenge.
• Foreshadowing: Hints that Aruto would become the Ark's final host as Kamen Rider Ark-One are dropped throughout the series:
  • In Kamen Rider: Reiwa The First Generation, Aruto is forced to use the MetsubouJinrai ForceRiser, the tool associated with the Ark's most prominent followers. Aruto also remains the only human being in the series to utilize one.
    • Of that same film, Will/Another Zero-One's attitude can be considered a mirror reflection of Aruto's mindset during his time as Ark-One, with how they are each given their corrupt power (by Finis and As respectively) a direct parallel to each other. It should also be noted that the outfit Aruto wears when he first becomes Ark-One is the very same one he wore when he first met Will.
  • Throughout the show, Aruto has been using the Ark's power and technology more and more frequently. First was Shining Assault Hopper (commandeering the Ark's Assault Grip to use with the Shining Hopper Key). Shortly after that, he is forcibly given Metal Cluster Hopper, giving Aruto a direct connection to the Ark that he had no choice but to use despite its power consuming him, willingly using it when it was his only option despite the risks attached.
  • During the Workplace Competition arc, it's been demonstrated that when exposed to or feeling enough malice, both HumaGears and humans can transform into the Monster of the Week, coming under the Ark's influence as a result, and Aruto's own anger while using Shining Assault Hopper makes its eye glow the same red as the Ark's main lens on its satellite.
• Good Is Not Nice: While he's still fighting to stop a genocidal terrorist, Aruto has lost most of the fetters he once had and is much more willing to employ force than he was before, even against his former friends when they get in the way, though he opts to disable their ability to transform rather than seriously harm them.
• Good Is Not Soft: Just because he cares about his former allies does not mean he will go easy on them, as he easily crushes Gai, Yua, and Fuwa with a disturbing amount of ease and disabling their ability to transform into Riders. This later takes a disturbing dive in #44 when he brutalizes Fuwa after Fuwa gets in his way as Ortheros Vulcan.
• Heroic BSoD: Horobi killing Is sends Aruto into overwhelming despair, to the point where he willingly becomes Kamen Rider Ark-One.
• Heel–Face Revolving Door: Briefly became an Anti-Hero for the last four episodes until Soreo showed up to break him out of his Ark-induced funk.
• Idiot Ball: For no coherent reason, he chose to keep using the Ark-Driver even after he realized As was manipulating him to become another Ark, even though his Zero-Two Driver was the strongest in the setting and more than enough to defeat Horobi.
• It's Personal: He disables the transformation devices of Gai, Fuwa, and Yua when they get in his way and warns them that his only problem is with Horobi.
• I've Come Too Far: When Naki demands to know if Aruto has given up on all of his ideals, this is what Aruto tells them in response.
• A Lighter Shade of Gray: Anti-Hero though he may be, he's still only out for Revenge against the murderer of his best friend and avoids fighting others when he can. Horobi by contrast was a terrorist whose goal would have required untold amounts of death and destruction and who was willing to murder members of his own kind if they displeased him, even before he became Ark-Scorpion.
• My God, What Have I Done?: Aruto experiences several of these as Ark-One.
  • Breaks down in tears after de-transforming from Ark-One in #42, heartbreakingly stating this:
    Aruto: I am...the Ark...
  • Has a severe panic attack when he accidentally destroys Jin in #43.
  • This comes to a point in #44, where he's so conflicted and lost on what to do that he asks Zea for answers.
• Not Brainwashed: Isamu and Yua initially assumed Aruto was possessed by the Ark, only to learn he willingly became Ark-One and kept his free will.
• O.O.C. Is Serious Business: Played for Drama. After his gigantic Heroic BSoD in #42, Aruto drops the cheerful persona he's had for most of the series, opting for a cold, vengeful outlook after Is's death. This forces everyone in the main cast to stop him from killing Horobi. He even gives an unsettling Death Glare after he detransforms from Ark-One, and it only gets worse from there as his fighting style slowly degenerates into unrefined brutality.
• Pay Evil unto Evil: Delivers an absolutely brutal beating to Horobi as Ark-One in retaliation for him killing Is. He later beats up Orthus Vulcan after Fuwa offers him No Sympathy for Is's death and tells him not to fight Horobi, who vengeance aside was on the verge of leading a crusade to wipe out humanity.
• Roaring Rampage of Revenge: Deconstructed. Despite insisting that his only objective is to kill Horobi, Zero-One's endgame illustrates just how much chaos that single-minded focus can wreak, starting with all of the other human Riders losing their powers by his hand, escalating to Jin dying as collateral damage to save Horobi, and only getting worse from there as As takes advantage of the situation to make both Aruto and Horobi cause even more destruction by getting into a fight with each other.
• Sanity Slippage: Even as he insists that he's only doing the bare minimum required to deal with his obstacles, it becomes increasingly apparent that Aruto is losing his grip on reality, hallucinating the inevitable future where he and Horobi remain as Ark Riders and delivering a brutal assault on Fuwa to force him out of Ortheros Vulcan. He regains himself in the finale thanks to Soreo's digital ghost giving him a much-needed pep-talk that helps him regain his composure and remember the ideals that led him to start his journey.
• Slasher Smile: Sports a subdued but decidedly horrifying one when he accepts the mantle of Ark-One from As.
• Start of Darkness: Is's death drives him to such despair that he takes the Ark-One Progrisekey from As and becomes Kamen Rider Ark-One.
• Temporarily a Villain: Willingly became Ark's host and an unscrupulous Anti-Hero to get back at Horobi for killing Is. Soreo snapped him out of it.
• This Is Unforgivable!: As his quote indicates, Aruto tried again and again to reach out to Horobi, but in the end Is's death proved to be too much for him to forgive and he became Ark-One for the sole purpose of avenging her.
• Unscrupulous Hero: Although he's no longer the All-Loving Hero he once was, Aruto's malevolent impulses are focused on Horobi, leaving him with no wish to harm others unless he's forced to. When he's confronted by Fuwa, Yaiba and Gai on his way to Daybreak Town, he initially tries to get past them and continue on his way without a fight. Once violence becomes unavoidable, he disables them by rendering their Drivers inoperable and leaves them otherwise unharmed.
• Villain Ball: A rare case where it's The Hero who grabs this. There would have been very few issues if Aruto had destroyed Horobi using the Zero-Two Driver. Instead, he chose to use the Ark-Driver instead and kept using it even after it became obvious As was manipulating him.
• Violence is the Only Option: Deconstructed. With Is's death, Aruto discards all attempts in trying to get through to Horobi and becomes hellbent on destroying him if it means justice for Is. However, all this really does is ignite a Cycle of Revenge that only gets worse when Jin dies to stop him from destroying Horobi, leading Horobi to the exact same fate Aruto caught himself in. Played straight later when Aruto defeats Horobi Ark-Scorpion by beating him up, but not killing him.
• Walking Spoiler: Knowing that Ark-One is Aruto spoils perhaps the biggest twist in the entire series and the major plot point of the final arc.

Tropes exclusive to him as Kamen Rider Ark-One

Singurize! Hakai. Hametsu. Zetsubō. Metsubōseyo.^note Taste destruction. Know ruin. Feel despair. Experience extinction. Conclusion one.

• Awful Truth: Ark-One's sole mind-altering function is to clear Aruto's mind of his doubts and regrets for becoming its host by any means - but it doesn't change the fact that he is now running from the truth that he pretty much is the Ark now. Sure enough, the first time he disengages the suit, he snaps back to reality and is hit with so much realization and confusion he starts crying uncontrollably.
• Became Their Own Antithesis:
  • Aruto, a kindhearted person who loves HumaGears to no end, willingly becomes the embodiment of the AI trying to corrupt them out of a cocktail of pent-up resentment, fear, and despair towards Horobi, a HumaGear that he spent a large chunk of the series trying to redeem. His brief smile upon seeing the Ark-One key only serves to further drive home the point that he's Not Brainwashed, the only mind-altering processes of the Ark-One suit merely serving to toughen his new villainous resolve.
  • For a more straightforward example, Aruto's acceptance of a villainous Transformation Trinket that should brainwash him but doesn't for the sake of simple Revenge eerily brings to mind Will/Another Zero-One, his literal antithesis.
• The Berserker: Despite the mind-altering affects suggesting that Aruto is in perfect zen, Ark-One is still a Rider harnessing malice and acts very similar to MetalCluster Hopper.
• Deadly Upgrade: Much like Assault Wolf, Ark-One isn't designed with the safety or comfort of its operator in mind. This prevents Aruto from immediately exacting his revenge against Horobi, as his body gives out from the strain and forces him to retreat moments before he can finish Horobi off. However, he gains a much finer control over it in #43, gaining a clearer grasp of Ark-One's abilities and overcoming the strain at an impressive pace.
• Evil Counterpart: Ark-One is this to both Zero-One and Zero-Two. The suit's appearance is a twisted version of Rising Hopper. The Ark-One key is similar to the Zero-Two key, in that it needs no authorization to be used, and upgrades the Rider to their highest evolution.
• Finishing Move:
  • Perfect Conclusion:
    • Perfect Conclusion Learning 5: By pressing the button on top of the Driver five times before pressing the inserted Progrisekey, Ark-One emits a stream of red smoke containing kanji with negative meanings, then reabsorbs them and unleashes a very powerful Area of Effect explosion.
    • Perfect Conclusion Learning End: By pressing the button on top of the Driver ten times before pressing the inserted Progrisekey, Ark-One delivers a Rider Kick powerful enough that just the act of extending his leg for the kick inflicts damage on the surrounding scenery.
• Foil: Tragically ironic to Zero-One itself. Zero-One uses the concept of The Power of Friendship to protect HumaGears from the malice of the Ark while Ark-One uses that very same malice to destroy Horobi, the very HumaGear he tried to redeem. Even their respective fighting styles are different from one another. Zero-One focuses more on finesse, evading attacks while maintaining balance between offense and defense. Ark-One solely focuses on pure power, effectively making him both The Juggernaut and The Berserker at the same time, ignoring the damage he sustained while relentlessly in pursuing his target until they are throughly defeated.
  • It is also one to Horobi once Ark Scorpion is acquired; Ark-One is a false form of Zero-One accessed by using the Ark's power, while Ark Scorpion is an Ark-empowered Horobi accessed by using a false form of the Zero-Two Driver and Zero-Two Progrisekey.
• Irony: Aruto is the final evolution of the Ark, the one thing he despised so much throughout the series. To twist the knife further, his nemesis Horobi receives a jury-rigged version of Zero-Two's equipment after he experiences the first major consequence to his blind Roaring Rampage of Revenge.
• The Juggernaut: Quite literally walks through any attack thrown at him without missing a single step. If anything actually gets in his way, he'll grab and incapacitate them with a swift blow by any means before moving on.
• Leaking Can of Evil: In #44, Zero-Two makes a human scream similar to the Ark's constant ambient screeching once finished transforming, and Ark-One replaces Zero-Two in some shots of the ensuing fight, symbolizing that being Ark-One is more about Aruto's state of mind than what suit he's wearing.
• Light Is Not Good: Covered in white plating to mimic the brightly-colored Zero-One, but is founded on the principles of targeted hatred rather than idealism.
• Limp and Livid: How Aruto tends to move while in the Ark-One suit, mostly due to the traumatic emotions driving him while he uses it.
• Mind over Matter: Displays a degree of this in #43, as he flings a bunch of signs without much trouble.
• Ominous Visual Glitch: On the splash screen that appears when he uses Perfect Conclusion, the characters writing out the finisher's name rapidly flickers between katakana and random kanji, as if Ark-One's corrupting effect is directly affecting the viewer's screen.
• One-Winged Angel: Downplayed in theory but ultimately played straight. On paper, Ark-One is only marginally stronger than Ark-Zero and still leagues below Zero-Two. Unfortunately, this still makes him far more powerful than everybody who isn't Aruto, and Ark-One can more than make up the difference by unleashing the pure, concentrated malice constantly being collected in the Ark-One Progrisekey from the now heartbroken Aruto.
• The Power of Hate: Ark-One has the ability to concentrate the malice collected by its Progrisekey and unleash it as a wave of pure destructive force, on a level that surpasses even Ark-Zero. This is so potent that Ark-One corrupts the ground beneath him just by standing on it.
• Scare Chord: The Ark-One Progrisekey very loudly blares one whenever it's opened.
• Superior Successor: Is explicitly stated to surpass Ark-Zero's capabilities. During its proper debut, Yaiba observes that the previous Ark has never displayed the level of power that Ark-One has.
• Tranquil Fury: According to the parts list for the Ark-One suit, Aruto is implied to be in a state of perfect zen to an impossible degree rather than trauma, due to the faceplate silencing his benevolent qualities and mentally sheltering him in a manner described as a calming experience.
• White and Red and Eerie All Over: Compared to the Ark-Zero suit, the Ark-One suit features white plating over the upper body, with streaks of red as well.

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"I don't want to ever forget the dreams I live for. That's why...I'll fight for a future where humanity and HumaGears can smile together. That's who I, Kamen Rider Zero-One, am!"