Kana Hanazawa

Red Blood Cell AE3803 (Erythrocyte) (voice)

Tomoaki Maeno

White Blood Cell U-1146 (Neutrophil) (voice)

Akira Ishida

Cancer Cell (voice)

Saori Hayami

Regulatory T Cell (voice)

Daisuke Ono

Killer T Cell (voice) / Memory T Cell (voice)

行成とあ

NK Cell (voice)

Kikuko Inoue

Macrophage (voice)

長縄まりあ

Platelet 'Leader' (voice)

小林裕介

Ordinary Cell (voice)

吉田有里

Black Lactic Acid Bacterium (voice)

高橋李依

Red Lactic Acid Bacterium (voice)

藤原夏海

Panda Lactic Acid Bacterium (voice)

久保ユリカ

Dappled Lactic Acid Bacterium (voice)

Mamiko Noto

Narrator (voice)