Shota Matsushima

as Kensuke Miyata

as Brain / Kamen Rider Brain (3 episodes)

as Takezuru (1 episode)

as Iwasaki Tosuke

as Brain / Kamen Rider Brain (2 episodes)

as Takasugi

as Brain (voice)

as Takuma Egawa (10 episodes)

as Brain Roidmude

as Brain

as Brain

as Brain

as Brain (voice)

as Takuro

as Brain (voice) (1 episode), as Brain (1 episode)

as Brain

as Brain

as Brain (voice)

as Brain (voice)

as Brain (48 episodes)

as J

as Hasegawa Makoto (10 episodes)