Aruto Hiden

Aruto Hiden (飛電或人) is a 22-year-old aspiring comedian who became the CEO of Hiden Intelligence after the death of his grandfather. Originally uninterested in taking up the position, he became witness to the terrorist attacks committed by MetsubouJinrai.net and reluctantly became Kamen Rider Zero-One (仮面ライダーゼロワン) for the sake of pursuing his dreams of making others smile.

Early Life
Aruto Hiden was born the grandson of Hiden Intelligence CEO, Korenosuke Hiden. His father, Soreo Hiden, passed away when he was young, so Aruto was raised by a HumaGear resembling his father to take Soreo's place as a parent and an emotional support.

Aruto and Soreo were present on the day of the Daybreak Town Accident, where they were enjoying a family outing with young Aruto spent most of his time engaging in comedic antics. When the chaos erupted from the Hiden Intelligence building, Soreo shielded Aruto from one of the explosions, but was grievously damaged in the process. In his final moments, Soreo encourages Aruto to continue pursuing his dream before his systems shutdown completely, leaving the young boy to grieve.

Becoming Zero-One
At the age of 22, Aruto is continuously struggling to hold his career as a comedian. After getting fired from his job at a theme park, Aruto was met at the park entrance by Izu, a secretary-type HumaGear who escorted him to Hiden Intelligence headquarters to discuss the wills of his late grandfather,

Brought before the executive committee, Aruto reads his late grandfather's wills and is shocked to discover that an imminent crisis involving the HumaGears will happen again, and the only way to combat against them is the Hiden Zero-One Driver, to be used exclusively by the succeeding president, whom his grandfather had named Aruto as. Although the entire board of directors were enraged by this sudden development, Aruto quickly turns down the role and excuses himself.

As Aruto goes back to the theme park in an attempt to beg for his job back, the Berotha Magia attacks the park, and Aruto attempts to stop it but is beaten senseless. After getting triggered from the Magia saying that human dreams were meaningless, Aruto re-stood his ground and asked the just-arrived Izu for the Zero-One Driver. Aruto's mind was then uplinked into the communications satellite Zea, where his mind processing speeds were enhanced to the point where he learns the entire Zero-One tutorial in five seconds. Aruto transforms into Zero-One and destroys the Magia henchman as well as the Berotha Magia. After his first battle, Izu reveals that by accepting the Zero-One Driver, Aruto had also accepted being the president. Originally being reluctant to do so, he was re-inspired after seeing the park manager be grateful for Zero-One.

Being CEO of Hiden Intelligence
to be added

Kamen Rider Zi-O: Over Quartzer
Zero-One appeared to face the heavily injured Kamen Rider Zonjis, introducing himself to be the only one for being the true first Reiwa rider, Zero-One. Aruto defeated Zonjis easily by using his Rising Hopper and Flying Falcon forms, followed by Black Woz celebrating his arrival.

Personality
Aruto is a cheerful individual who loves to make people laugh, and doesn't give up even if he fails to do so. Despite this cheerful trait, he will not hesitate to fight back against people who threaten that happiness. To this end, he reluctantly becomes a Kamen Rider not to be a company president, but to be someone who can protect the peace.

Due to his upbringing, he has a very positive outlook on HumaGears, and strongly believes they can prosper alongside humanity. This makes destroying Magias difficult for him, especially if they were former Humagears he knew personally. He eventually gets accepts and past this weakness by the time he encounters Kobe Sakamoto.

Aruto also has a strong sense of empathy, shown towards Seiji Tazawa whom both had lost someone close to them and required a HumaGear to take their appearance for emotional support. To this end, Aruto was willing to put himself as a person first rather than immediately have Seiji arrested for breaking the law.

During mid-battles, he will say "There's only one person who can stop you, and that's me!" (トラちゃん).

Aruto also playfully refers to his Progrise Keys [i.e. he calls the Flaming Tiger Key and its corresponding animal "Tora-chan" (トラちゃん)]. This is very evident with Flying Falcon, where every time he meets Jin he will demand Jin to return "Tori-chan" (トリちゃん).

Super Hero Time
In the closing of Super Hero Time, Kamen Rider Zero-One is seen posing alongside Vulcan, Valkyrie and the.

Kamen Rider Battle: Ganbarizing
Kamen Rider Zero-One, alongside Vulcan and Valkyrie will be playable characters in Kamen Rider Battle Ganbarizing.

Kamen Rider City Wars
Kamen Rider Zero-One is a playable character alongside the other Kamen Riders.

Kamen Rider Buttobasoul
Kamen Rider Zero-One is a playable character with Vulcan,Valkirye and other Riders in Kamen Rider Buttobasoul.

Powers and Abilities
With the Hiden Zero-One Driver equipped, Aruto gains the following abilities:
 * Enhanced Thought Process: By equipping the Zero-One Driver, Aruto's thought processing speeds are exponentially enhanced, rivaling that of an A.I. supercomputer.

Devices

 * Hiden Zero-One Driver - Transformation device
 * Progrise Keys - Transformation trinkets
 * Hiden Risephone - Zero-One's personal smartphone.
 * Progrise Holder - Carrying straps for Progrise Keys

Weapons
Handheld weapons:
 * Attache Calibur
 * Authorise Buster

Suit-equipped weapons:
 * Unlimited Chopper - Biting Shark's blades on Zero-One's arms.
 * Panthera Burner - Flaming Tiger's flamethrowers on the palms of Zero-One's hands.
 * Bear Claw - Freezing Bear's coolant gauntlets on Zero-One's hands.

Vehicles

 * Rise Hopper - Zero-One's personal Rider Machine that is transformed from a giant Hiden Risephone.

Ridewatch
Zero-One Ridewatch (ゼロワンライドウォッチ): Based on Kamen Rider Zero-One Rising Hopper, this Ridewatch would provide access to the Zero-OneArmor. It is dated 2019, but shown on the Ziku-Driver's screen as Rider.

Portrayal
Aruto Hiden is portrayed by Fumiya Takahashi (高橋文哉). His suit actor is Yuya Nawata (縄田 雄哉), who took over the role as leading suit actor for the main Riders starting with the Reiwa era, succeeding Seiji Takaiwa. Nawata was previously the suit actor for Kamen Rider Genm, Kamen Rider Cronus (Taiga Hanaya), and most recently Kamen Rider Geiz.

Etymology
With "zero" in Japanese and "one" in Japanized-English, Zero-One can be read as Rei Wan (零 ワン) in Japanese, referencing the fact that he is the Kamen Rider of the Reiwa era.