Yuki Sato

as Arata Kagami / Kamen Rider Gatack

as 和田正隆（わだ まさたか）

as Azuma

as Eiji Tokuyama

as Sasaki

as Inuyama Katsumi

as Ultraman Cosmos (voice)

as Kagurazaka Makoto

as Yashiro Makoto

as Takashi Ochiai

as Shunichi Takafuji

as Uchimura Takeshi

as Hiro Sakakibara

as Akira Hanei

as Child

as Yosuke Kitano

as Nami

as Arata Kagami / Kamen Rider Gatack

as Arata Kagami / Kamen Rider Gatack

as Arata Kagami

as 加贺美新

as Keisuke Asou

as Yuki Kojima

as Baby (voice)

as Yusuke

as Arata Kagami / Kamen Rider Gatack