Horobi was meant to be a Parent-Type HumaGear.
Ark hacked four HumaGears (Horobi, Naki, Jin, Raiden)
Zea create Progrisekey based on the good deed of humans while Ark create Zetsumerisekey based on the evil deed of humans.
Soreo Hiden is the creator of Zero One Driver.
Hiden and Zaia both involved in constructing Ark.