Full cast of Atom: The Beginning

Takuma Terashima

Hiroshi Ochanomizu (voice)

12 episodes

Yuichi Nakamura

Umataro Tenma (voice)

12 episodes

Yuki Inoue

A10-6 (voice)

12 episodes

Mikako Komatsu

Motoko Tsutsumi (voice)

12 episodes

Yoshino Nanjo

Maria (voice)

12 episodes

Ayane Sakura

Ran Ochanomizu (voice)

12 episodes

Kengo Kawanishi

Shunsaku Ban (voice)

12 episodes

Mitsuki Saiga

Dr. Lolo (voice)

12 episodes

Nobuo Tobita

Kensaku Ban (voice)

12 episodes

Takahiro Sakurai

Moriya Tsutsumi (voice)

12 episodes