Masaki was a freelance journalist captured by Cronos and used as an experimental guinea pig in the Zoalord development program. He is a 039prototype body039 for the Zoalord form of Richard Guyot. Dr. Yamamura a scientist involved in the project discovered Guyot039s plans for the Guyver units and recruited four of the prototypes including his old pupil Murakami in an attempt to destroy the Commander while he was being processed into his new battle form. The other eleven members of the Cronos Council of twelve all Zoalords intervened Masaki is the only surviving rebel. He joins with Sh to fight Cronos having his own revenge in mind. He doesn039t quite trust Agito at first because of Guyver III039s earlier connections with Cronos.