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)

Toa Yukinari

NK Cell (voice)

Kikuko Inoue

Macrophage (voice)

Maria Naganawa

Platelet 'Leader' (voice)

Yusuke Kobayashi

Ordinary Cell (voice)

Yu-ri Yoshida

Black Lactic Acid Bacterium (voice)

Rie Takahashi

Red Lactic Acid Bacterium (voice)

Natsumi Fujiwara

Panda Lactic Acid Bacterium (voice)

Yurika Kubo

Dappled Lactic Acid Bacterium (voice)

Mamiko Noto

Narrator (voice)