Aruto Hiden is the current CEO of Hiden Intelligence and titular main protagonist of Kamen Rider Zero-One. He transforms into Kamen Rider Zero-One to defend humanity from the cyberterrorist group MetsubouJinrai.NET and their rogue Magia.
He is portrayed by Fumiya Takahashi.
When Aruto was young his father Soreo died. Soreo was replaced by a HumaGear doppleganger who sacrificed himself to protect Aruto from an explosion caused by the Daybreak Town incident.
As an adult, Aruto aspired to be a comedian but struggled due to not being able to tell funny jokes. After his grandfather died, he wrote in his will that Aruto was to be his successor as CEO of his company, Hiden Intelligence. Though reluctant at first, Aruto accepts the role and becomes Zero-One to defend humanity from MetsubouJinrai.NET and their rogue HumaGears.
After Izu was destroyed by Horobi, Aruto was corrupted by Azu into becoming Kamen Rider Ark-One.
Kamen Rider X
Kamen Rider Amazon
Kamen Rider Super-1
Kamen Rider ZX
Kamen Rider Black/RX
Kamen Rider Kuuga