Izu was created by Korenosuke Hiden as the successor to both Will and Wazu Nazotoku. After Korenosuke passed away, the communication satellite Zea began the development of the Hiden Zero-One Driver, reactivating Izu in the process. Izu says that her mission is finally starting as per BS-ZA protocol.
She fully works alongside the president and supports him in his cause and his fight, but Aruto hates the fact that she constantly explains his gags and jokes.
To remedy Aruto's lack of experience as president and a Kamen Rider, she usually takes charge of important actions such as making announcements to the media and creating new Progrisekeys as she scans Magia Aruto fights.
It is unknown if she has reached Singularity or not, though there are signs (such as her disobedience at Aruto's pleas of not explaining his jokes). Izu is capable of developing emotions to further show she is evolving, expressing surprise, confusion and happiness. (ex. Izu was confused and then started clapping and smiling when Aruto as Zero-One became Freezing Bear form for the first time.) As of episode 18, she evolves further by telling her own jokes/word puns, taking what she learned from Aruto and intergrating bits of it into her personality along with learning from other human and HumaGear interactions.
Name: Izu
Age: 14
Birthday: [Redacted] 2006
Gender: Female