Full cast of The Guyver: Bio-Booster Armor

Takeshi Kusao

Shou Fukamachi / Guyver I (voice)

12 episodes

Kozo Shioya

Tetsuro Segawa (voice)

12 episodes

Yuko Mizutani

Mizuki Segawa (voice)

12 episodes

Hideyuki Tanaka

Agito Makishima / Guyver III (voice)

12 episodes

Norio Wakamoto

Oswald Lisker / Guyver II

2 episodes