Shouichi encounters a teenage girl called Sayaka, who ran away from a military facility because of an attack by the Ant Lords. Sayaka has a supernatural ability to foresee the future. Risa Fukami, of the military group GA, wants to use that power to enhance the newly-made G4 System, which was based upon designs stolen from Ozawa. Now, Agito and Gills must fight to stop the Ant Lords' attack, as G3 and G4 settle their score.
as Shouichi Tsugami / Kamen Rider Agito
as Makoto Hikawa / Kamen Rider G3-X
as Ryo Ashihara / Kamen Rider Gills
as Shiro Mizuki / Kamen Rider G4
as Risa Fukami
as Mana Kazaya
as Sumiko Ozawa
as Tetsuya Sawaki
as Toru Hojo
as Mysterious Youth
as Koji Kono
as Takahiro Omuro
as Taichi Misugi
as Yoshihiko Misugi
as Sayaka Kahara
as Rei Motoki
as Customer in Hamburger Shop
as Sayaka's father
as Sayaka's mother
as MPD Superintendent General
as BBQ Shop Clerk
as Ant Lords (voice)
as Senior Police
as Senior Police
as Senior Police
as Risa Fukami's henchman
as Risa Fukami's henchman
as Ant Lord Formica Pedes (voice)
as Ant Lord Formica Pedes (voice)
as Ant Lord Formica Pedes (voice), G4 Base Operator (voice)
as Ant Lord Formica Eques (voice)
as Ant Lord Formica Regia (voice)
