Saika Fuuma is one of the supporting characters in the series' Kaiju World War. She is a Taimanin cyborg and serves as the secretary of the Fuuma clan. In Taimanin RPGX and Action Taimanin, she handed over the role to Tokiko Fuuma but remained in Gosha Village as a supporting protagonist, but in Taimanin Asagi Battle Arena, she joined Danjo's rebellion and left the village as an antagonist. After lost to Kotaro, she reforms herself to join the Fuuma Organization as a recurring character and the anti-heroine.