Kamen Rider Lorebook

1. #1Yuto Sakurai

   Keys: Kamen Rider, Kamen Rider Zeronos, Riders, Heroes, Kamen Rider Den-O, Male

   Yuto Sakurai (桜井 侑斗, Sakurai Yūto) is a young man who transforms into Kamen Rider Zeronos (仮面ライダーゼロノス, Kamen Raidā Zeronosu, Masked Rider Zeronos).

   When Yuto was a child, he moved to a small town to live with his grandmother following the death of his mother and was teased by the other children for being a city boy. He possessed an artifact called the Trump Stone, which made him a target of the Oni Brothers Goludora and Shilubara. Thus Deneb, Ryotaro, Kotaro and the rest of the DenLiner crew aid him and get the artifact to the past.

   Unbeknownst to everybody, the DenLiner crew weren't aware that Yuto's true identity, referring the boy as "Yu". Deneb asks to form a contract with him, allowing him to gain a physical form. Yu's wish for the contract is for Deneb to see his contract holder, once more. After he is returned to his own time, Yu promises to meet Deneb again and tries once more to settle in his new home.

   Prior to the series, Yuto Sakurai encounters his future self, the older Yuto Sakurai of 2007, who revealed to him the situation relating to the Imagin. Provided with the Zeronos arsenal and Deneb, Yuto takes the ZeroLiner forward in time to May 20, 2007, where he makes himself known to Ryotaro Nogami after the Wolf Imagin is destroyed. He warns Ryotaro not to look for the mysterious man in the trenchcoat, the future Yuto Sakurai that Ryotaro knows as his sister's fiancé. Yuto also reveals that he is Kamen Rider Zeronos, chiding Ryotaro's flawed ideals as Den-O yet was unhinged when Ryotaro intended to keep fighting for what he believes in. Once he meets his near-future self, who abducts Ryotaro to prepare for an event known as the Climax Scene, Yuto begins to respect the boy chosen to be Den-O.

   Yuto originally has ten Zeronos Cards, the items that allow him to become Zeronos, which are in turn are tied to the memories people have of the elder Sakurai. Each time a card is used up from a battle, the memories from normal people who knew Sakurai disappear as well. It is this reason that he tries not to become Zeronos very often, only doing so if it is necessary to help Den-O. After using up his second-to-last card in an attempt to save Deneb, only to learn it was a false alarm, Yuto is reluctant to use his final card until Airi is kidnapped by Fujishiro, one of her former suitors that has been possessed by the twin Anthopper Imagin. He uses his last card as Airi begins to remember him, making Fujishiro and Airi lose all memories of the Sakurai they knew. Unable to become Zeronos, Yuto is confronted by Sakurai himself, receiving another set of Zeronos Cards despite Deneb's protests. These new cards show that the older Sakurai is displaced from time and space during each transformation, as memories of him alone cannot power the cards. As Kai arrives, Kai sees fit to eliminate Yuto Sakurai, as he believes that Sakurai is the key to the Junction Point. Kai sends the female Snail Imagin to 1993 to kill Yuto before he could meet Sakurai, removing him from time.

   However, the Zeronos Cards have created a time lag, allowing Yuto to return despite not being a Singularity Point like Ryotaro. He also uses red Zeronos Cards, which Ryotaro notices. Yuto tells him that the memories of the older Sakurai are no longer enough to support Zeronos' power, and now his memories in 2007 are being used as power to transform him into Zeronos Zero Form. Eventually, Kai starts to question his agenda and realizes that Yuto and his future self have been acting as a distraction from his true target: Airi, who is tied to the Junction Point. Once Ryotaro goes into the past, Yuto is forced to battle the numerous Imagin under Kai, fighting them and the Death Imagin to protect Airi until Ryotaro returns.

   When Ryotaro does return, Yuto fights alongside him using the last card Deneb gave him, which severs his ties to his future self. After the battle is over, Yuto immediately returns to the ZeroLiner to find Deneb only to find nothing but the last meal Deneb prepared for him, which ironically has shiitake in it. Yuto willingly eats the meal as Deneb surprises him. Instead of comically beating him up as normal, Yuto instead hugs Deneb, crying tears of joy. After Yuto, Hana, and Ryotaro discuss their respective futures, Yuto gives Hana a pocket watch, which signifies a possible meeting in the future. Yuto and Deneb say their goodbyes to Ryotaro as the ZeroLiner departs into the time stream.

   Later, Ryotaro finds Yuto having been investigating the crime lord Seiya Kuroki undercover and discovering his ties to Negataros. Yuto and Deneb manage to maintain his guise of being a villain in the ranks until Ryotaro's partner Suzuki gets himself caught by the evil organization. Attempting to save Suzuki, he gets caught in Negataros' trap to draw out the detectives pursuing him. In the ensuing battle, Yuto is revealed to be in possession of more regular Zeronos cards.

   Unlike Ryotaro, Yuto claims that protecting the flow of time is not the same thing as protecting people. He says that saving people is unnecessary if it means disrupting the flow of time even if it means sacrifices must be made to save the future. He holds a very spoiled personality, and often acts like a child when things do not go his way and putting lots of sugar in his coffee before actually tasting it, hence earning him the nickname "Boku-chan" (僕ちゃん) by Urataros. Yuto is also the kind of figure who would use dishonest methods to get the job done, but has since abandoned this way of fighting. A running gag with Yuto is his hatred for shiitake mushrooms, going as far as a comic beating to make sure Deneb does not serve or buy any.

   When possessed by Deneb, Yuto's hair grows out past shoulder length with two locks of hair on each side of his head. On the right side, the lock is a neon green with a darker green streak within it. His personality is also overwritten by Deneb's, who is much more polite and apologizes for Yuto's actions, often by giving out Deneb Candies and acting overly friendly. This usually gets Yuto angry thus forcing Deneb out of him and comically beating him. In one occasion, he was also possessed by Urataros. Although surprised and initially annoyed, he allowed the possession to happen for a short while.

2. #2Tsukasa Kadoya

   Keys: Dai-Shocker, Destroyer of Worlds, Kamen Rider, Kamen Rider Decade, Amnesiac, Riders, Interdimensional Traveler, Male

   Tsukasa Kadoya (門矢 士, Kadoya Tsukasa) is the main protagonist of Kamen Rider Decade. He is an interdimensional traveler who transforms into Kamen Rider Decade (仮面ライダーディケイド, Kamen Raidā Dikeido) to oversee the fate of the multiverse, embracing his role as the Destroyer of Worlds (世界の破壊者, Sekai no Hakaisha).

   Tsukasa later returns in Kamen Rider Zi-O as a major supporting character as he observes the actions of Sougo Tokiwa and their effects on the timeline.

   Prior to becoming a Kamen Rider, Tsukasa was the ruthless leader of Dai-Shocker, a power-mad tyrant with a strong lust for control. This side manifested itself during Tsukasa's stint as the "destroyer of worlds".

   In his amnesic state, Tsukasa is an odd figure with a self-righteous attitude, annoying others through his rude mannerisms. Having no clear goal in life, Tsukasa decided to wander through the A.R. Worlds as Decade, half-heartedly protecting the innocent. Deep down however, Tsukasa genuinely cares for the well-being of others, especially his friends. Thus, whenever someone is seriously at harm, Tsukasa will help them without hesitation, no matter how dangerous the situation.

   In strong contrast to his talents and outlook, Tsukasa can be significantly clumsy at times, made apparent when growing too cocky for his own good. In such moments, Natsumi often keeps him in line with her signature pressure-point attack, much to Tsukasa's irritation.

   As a photographer, Tsukasa desires to "catch the world" with his photos, something impeded by the distortion of reality. Though normally brushing it off as "unimportant", Tsukasa evidently felt a sense of inferiority from this, being reminded of his status as an outcast. Noticeably, whenever someone compliments him, especially his photography, Tsukasa becomes significantly cheerful in response, a far cry to his usual self.

   After fully reclaiming his memories, Tsukasa acts more strategically in a crisis, opting to rely on other Riders for assistance. For such cases, he now closely observes the situation to determine its requirements, intervening when needed. However, his demeanor itself is still undeniably quirky, something both friends and foe alike agree on.

   Before a climactic battle begins, a major villain often demands for Tsukasa's identity, to which he replies by declaring "Just a passing-through Kamen Rider, remember that!" (通り過がりの仮面ライダーだ、覚えておけ！, Tōrisugari no Kamen Raidā da, oboeteoke!).

   On a humorous note, he heavily disagrees if someone defines his Rider form is pink, causing him to explain at length that Decade is magenta in color.

   Evidently, Masahiro Inoue has stated Tsukasa to be an enigmatic character, playfully expressing him as a "dangerous weirdo" that lacks civility. Simultaneously, Masahiro acknowledges Tsukasa to be a true hero, one that always shines in moments of danger.[1]

   Tsukasa uses a "Decade Pink" Blackbird Fly 135 Twin-lens Reflex Camera.

3. #3Aruto Hiden

   Keys: Hiden Intelligence, Kamen Rider, CEO, Comedian, Riders, Heroes, Kamen Rider Zero-One, Male

   Aruto Hiden (飛電 或人, Hiden Aruto) is the main protagonist of Kamen Rider Zero-One. He is a former comedian and the current CEO of Hiden Intelligence who transforms into Kamen Rider Zero-One (仮面ライダーゼロワン, Kamen Raidā Zerowan).

   Aruto is a cheerful individual who will go above and beyond to make those around him happy, even though he is horrible at it. He strongly believes that like humans, Humagears can indeed possess a heart and have dreams of their own, enabling them to prosper alongside humanity. To this end, Aruto became Zero-One to fight against those who he feels threatens that ideology, though this ultimately clouds his judgement of them, especially with ones he had previously developed a strong bond with and prioritized their safety and dignity over profits of the business world. This would eventually lead to his loss in the Workplace Competition against Gai Amatsu, a certified expert in the field.

   After becoming Ark-One, Aruto willingly discarded much of his comedic and lighthearted traits, now becoming cold, serious, and vengeful towards Horobi specifically; despite having previously sympathized with the Humagear's unwilling affiliation with the Ark, Aruto now seeks revenge on him for Is's death, as she was his only family after the deaths of his biological kin. While Aruto tries to avoid bringing harm to his former allies, he does not hesitate to fight them if they interfered with his desire for vengeance against Horobi, though he manages maintain enough of his composure to not kill them on the spot. Despite his fall from grace, Aruto is completely aware of his actions and thus grieves with the consequences of what he has become. After briefly seeking advice from his father, Aruto's final clash with Horobi served to teach the latter the meaning of the human heart.

   Aruto is known for his good nature and polite manners, as evident towards his usage of the honorific "-san" when speaking with Isamu and Yua. However, his lack of its use towards Gai indicates his total loss of respect for such.

   Aruto has also given playful nicknames to his Progrisekeys, calling Flaming Tiger "Tora-chan" (トラちゃん), Flying Falcon "Tori-chan" (トリちゃん) and Biting Shark "Same-chan" (サメちゃん).

   Aruto's catchphrase during battle is "There's only one person who can stop you... and that's me!" (お前を止められるのはただ一人…俺だ！, Omae o tome rareru no wa tada hitori... ore da!).

4. #4Zein

   Keys: Villains, Mysterious Figures, Kamen Rider, Antivillains, Kamen Rider Outsiders, Kamen Rider Zein, AI, Riders

   Zein (ゼイン) is the secondary antagonist of Kamen Rider Outsiders. It is an artificial intelligence that transforms into Kamen Rider Zein (仮面ライダーゼイン, Kamen Raidā Zein).

   Zein's personality is likened to that of an Übermensch, an individual adhering to its own personal moral code. Even though it is viewed as a benevolent AI by its associates since it detests everything that is evil, behind Zein's benevolent facade belies a controlling despot with a God complex. Even before showing its true colors, Zein comes off as brutal, indifferent, oppressive, and a sadistic absolutist in its crusade against malice. It has no qualms hunting down targets who commit even the most minor acts of evil imaginable[ep.5 Goddess of Genesis and the Third Singularity]. Because of being bestowed with the powers of every heroic Kamen Rider, Zein believes itself to be morally superior to humans, and even the villains trying to oppose it. This absolutism accounts for Zein's incapability of seeing moral nuances in people, as it only sees them as either "Good" or "Evil", without any regard for gray areas.

   Zein proves itself to be no less malevolent than the Ark. Ironically, Zein is created to oppose the Ark and all the malice associated with it, but Zein's actions alone cross too many lines that it is deemed a threat to the world if left unopposed. If the Ark used to desire humanity's destruction for their capacity for evil, Zein resolves to do the same but much worse by taking its worldview of good and evil to their logical extremes, which is a slippery slope in and of itself to go on. After Kamen Rider Zero-Three reveals to Yuto the truth about his timeline, all of Zein's narrative of benevolence and goodwill are nothing but the empty excuses of a hypocritical and sanctimonious tyrant. It is solely dedicated to creating a stagnant world of absolute good and order, but without malice to balance all forms of benevolence, and as such dismisses the idea of the balance between good and evil as an alien concept.

   Despite being referred to as a perfect being by Horobi, Zein is far from infallible. It resents its authority and sense of perfection being questioned or challenged by others. Geniuses like Kuroto Dan can outsmart the AI; and the AI's own errors lead to its being outperformed and defeat by Kamen Rider Zero-Three. These cause it to be more wrathful against anyone opposing its goals - Outsider or not.

   Ultimately, Zein's worldview of black and white in absolutes eventually leads to its downfall. In the end, Zein becomes the very same evil it swears to destroy, allowing the Outsiders to finally defeat it for good.

5. #5Ho-Oh Kaguya Quartz

   Keys: Kamen Rider Gotchard, Heroes, Kamen Rider, Riders, Anniversary Rider, Kamen Rider Legend, Male

   Ho-Oh Kaguya Quartz (鳳桜・カグヤ・クォーツ, Hōō Kaguya Kōtsu)[3][4] is a resident from another world who transforms into Kamen Rider Legend (仮面ライダーレジェンド, Kamen Raidā Rejendo).

   In his childhood, Ho-Oh Kaguya Quartz was among the many that were terrorized by Hundred's forces, with his grandfather perishing from their destruction. Just before suffering a similar fate, Kaguya was saved by Kamen Rider Decade, inspiring the former in his early adulthood.

   Through unknown means, Kaguya later went on to develop the Aurora Curtain System, becoming Kamen Rider Legend. Legend became renowned as a hero in his own world for repelling Hundred's forces and bringing light back to the people there.

   Kaguya summoned Houtaro Ichinose to his homeworld to study and replicate Kamen Rider Gotchard's power. Deeming Houtaro not "gorgeous" enough for him yet, Kaguya confiscated the Gotchardriver and tried to give the young Rider a makeover. At the same time, the two worked together to fend off Hundred's Kasshines when the latter attempted to break into the Ho-Oh Tower.

   When Gengetsu - an executive of Hundred - showed up to terrorize the city, Houtaro wanted to confront him right away, but Kaguya insisted that he must finish having a gemstone bath first, as a part of the makeover. Houtaro, dissatisfied, left on his own without the Gotchardriver. Thanks to Butler, however, Houtaro learned of Kaguya's backstory and the reasoning behind his actions.

   Kaguya appeared in time to return the Driver to Houtaro. Gengetsu wanted Kaguya to defect to Hundred, so that they could conquer dimensions together, but Kaguya refused the offer. Transforming into Legend, he lent Gotchard several of his own cards, resulting in new forms to assist the latter in battle. After Gengetsu had been defeated, the Aurora Curtain system began to malfunction, and Houtaro had to be sent home. The two bade farewell to each other as friends, with Kaguya desiring to meet Houtaro again some day. Unbeknownst to either, the malfunction would later cause Houtaro to lose his memories of the events.

   Hundred's forces found its way to Houtaro's world in search of the Legend Kamen Riser. Saigetsu confronted Gotchard to both dispose of him and buy time for his army of Dai Mazines to cross over. Just as Houtaro was being cornered, Kaguya made his presence known, having dealt with the Dai Mazines himself earlier. Using the Legend Kamen Riser, Kaguya transformed into Legendary Legend, prevailing over Saigetsu and forced him to retreat.

   Kaguya was surprised that Houtaro did not remember him, but thanks to Butler, his memories were restored. Houtaro and his friends showed Kaguya around their city. During one such trip, a horde of Kasshines interrupted, forcing Kaguya and Houtaro to fight them first. In the battle, Kaguya took Houtaro's Hopper1 and Steamliner card without permission and used them himself to destroy the enemies. Houtaro mistook this for callousness, which saddened Kaguya and drove him away. Once again, a talk with Butler later on showed Houtaro that Kaguya was not that kind of person. With this knowledge in mind, Houtaro caught up to Kaguya to say sorry only to find Legend having a rematch with Saigetsu. Reassured by Houtaro's apology, Legend defeated Saigetsu once again.

   The Hundred Superiors deemed Saigetsu a failure and forcibly turned him into the Dooms Clock in order to destory the world. Sensing this and resolving to deal with the threat alone, Kaguya attacked Houtaro to drive him away, not wanting his new friend to be involved. Despite this, Houtaro chose to not be left behind, and joined Kaguya in his mission regardless.

   Legend and Gotchard found Saigetsu - revived and transformed into the Ark-One Malgam by Gigist - standing in their way. The strengthened foe proved to be a challenge for both of them, but Legendary Legend, using the power of Kamen Rider Zero - One and Kamen Rider Zi-O's forms, was able to gain the upper hand. Together, the two vanquished the Ark-One Malgam and destroyed the Dooms Clock, saving Gotchard's world.

   Afterwards, Kaguya returned to his world. He shook hands with Houtaro before departing as an affirmation of their friendship. As he and Butler were leaving, they caught a glimpse of a red Kamen Rider Gotchard fighting and struggling for help.

   Kaguya as Legend returns to Houtaro's world and quickly defeats the Dreatroopers with his Rider kick, causing Hellcrate to retreat. He informs them that the invaders are from an alternate future where Gotchard Daybreak resides. Kaguya said that despite his and Butler's efforts, he can't access that timeline with the Aurora Curtain system.

   However, with the help of Fuga and Kyoka, the alchemists managed to transmute Steamliner into Gigantliner. Houtaro and Rinne proceed to go to the future while Kaguya stays behind to protect the present with Supana and the other alchemists.

   When Hellcrate and the Dreatroopers launch another assault, Kaguya and Supana transformed to fight them. However, during the battle, Kaguya gets knocked out of his transformation. As he attempts to transform again, Dread Type Three slices his card.

   Just then, an Aurora Curtain opens, unleashing a barrage of energy bullets that repel the Dreatroopers. The dimensional wall then transported Kaguya to another area where he encounters his idol, Tsukasa Kadoya, who has saved him once more. Tsukasa hands Kaguya a picture he took of him and commends him for making friends, saying he wishes to see the type of legend that Kaguya will make before departing through an Aurora Curtain which transported Kaguya back to where he was. Feeling inspired by his words, Kaguya transforms into Kamen Rider Legend once again using a new version of the Legend Chemy Card created using Tsukasa's photo of him.

   With the Legend Ride Magnum, he summons Kuuga, Den-O, Double and OOO, who collectively obliterate the Dreatroopers and Dread Type Three with their signature finishing moves.

   Later, Kaguya watched as Kamen Rider Valvarad and the alchemists repel Glion's forces back to the alternate future, destroying Hellcrate, Glion's fortress, and the remaining Dreatroopers. After the wormhole closes, Kaguya returns to his world off-screen, his mission accomplished.

   A few months after Glion's defeat, Kaguya, bathing in jewels, is on a cross-dimensional call with Houtaro using the Legend Kamen Riser. Houtaro updates him on everything that has happened since Kaguya's departure before ending the call early to go to the New Earth.

   Some time later, Kaguya and Houtaro, in their base Rider forms, uses the Aurora Curtain to visit Shoma in his world for the first time. He gave Shoma a gift, the Kuuga Gochizo.

   Kaguya and Houtaro argue for a bit before Shoma, who has now transformed into Gavv, intervenes and gives them some gummies before leaving. Kaguya and Houtaro tries the snacks, exclaiming that it was delicious.

   An extremely confident, borderline narcissistic man, Kaguya lives luxuriously and views himself as a saint-like figure who will guide his world to salvation. As an extension of egotism, he almost never uses personal pronouns, instead speaking of himself in the third person as "Kaguya-sama". He likes to insert English words into his speech, but he especially prefers "Gorgeous", using it as some sort of mantra for his actions.

   According to Butler, Kaguya's actions represent his intent to draw his enemies' attention to him in order to keep all other worlds safe. However because Kaguya is the sole Rider in his world, he in fact feels lonely at times, and uses "gorgeous" as a way to fulfill that void. After meeting Houtaro for the first time, he considered him gorgeous and vowed to see him again.

   In battle, he prefers summoning or transforming into Legend Riders to clear out large numbers of enemy troops.

6. #6Baku Yorozu

   Keys: Kamen Rider, Bad Luck, Lucid Dreamer, Kamen Rider Zeztz, Riders, Heroes, Male

   Baku Yorozu (万津 莫, Yorozu Baku) is the main protagonist of Kamen Rider Zeztz. He is a special agent working for CODE who transforms into Kamen Rider Zeztz (仮面ライダーゼッツ, Kamen Raidā Zettsu),

   Background

   In his past, Baku Yoruzu had been the victim of several freak accidents throughout grade school and college, yet he miraculously survived every single one of them. At some point after he began job searching, he learned how to lucid dream. To fulfill his "dream" of being a secret agent like the one he admires in his favorite spy films, he began controlling his dreams by making himself one, calling himself "Code Number Seven", an agent of CODE, where his missions were subconsciously supplied by his commander Zero.

   Becoming Zeztz

   One night, Baku dreams of the national celebrity Nem, who was a kidnapped "damsel in distress". After being awoke by his little sister Minami Yorozu, Baku goes to search for a job at a job center but is hit by an unmanned car and hospitalized after attempting to save a young girl from being kidnapped. He is visited at the hospital by his worrying little sister Minami Yorozu, who advises him to keep his "dreaming" to when he sleeps. With a sudden uptick in crimes committed by what the police call the Nightmares, the Gun Nightmare attacks Baku in his dream. Though initially unaware of his dream state, Baku quickly catches on and resumes his previous dream; he dons his "Code Number 7" persona against the monster, but he proved too weak to fight it. After being pulled into his subconscious where he meets Zero face-to-face, he is given the Zeztz Driver and returns to fight the Gun Nightmare as Kamen Rider Zeztz, where he effortlessly defeats the monster and saves Nem.

   Other Events

   Kamen Rider Gavv

   Baku stumbled upon Shoma in the streets and handed him the Zeztz Gochizo which he thought it belonged to the latter. As Shoma attempted to return the Gochizo as he did not recognize it, Baku is abruptly zapped by a UFO. Explaining to Shoma that it is a common occurrence for him whenever he helps people, he shambled off as he told Shoma to "leave everything to him".

   Personality

   In the real world, Baku is an ordinary, good young man. He has a strong desire to help out people in need, however he is extremely unlucky. Ever since he was a kid, whenever he would help out someone, misfortune would befall him despite the immensely unlikely odds. Throughout his life, he fell victim to a lightning strike, a shark attack, being struck by a meteor and getting attacked by a flying saucer. Baku is a big fan of spy movies, with his room being filled with spy-related memoriabilia.

   In his dreams, Baku becomes active as the "invincible agent". He becomes a skillful, suave show-off but still retains his kindness.

   Powers and Abilities

   Abilities

   Lucid Dreaming: Baku is aware of his dreams and is able to control them as he wishes.

   Bilingualism: Aside from his native Japanese, Baku can also speak a fair amount of English, having accumulated the skill from watching spy thriller films ever since he was a child.

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