Yuri Yoshida

Lactic Acid Bacteria (Kuro) (voice)

Rie Takahashi

Lactic Acid Bacteria (Aka) (voice)

Natsumi Fujiwara

Lactic Acid Bacteria (Panda) (voice)

Yurika Kubo

Lactic Acid Bacteria (Buchi) (voice)

Kana Hanazawa

Red Blood Cell (Erythrocite) (voice)

Tomoaki Maeno

White Blood Cell (Neutrophil) (voice)

Akira Ishida

Cancer Cell (voice)

Daisuke Ono

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

Kikuko Inoue

Macrophage (voice)

Maria Naganawa

Platelet (voice)

Saori Hayami

Regulatory T Cell (voice)

Toa Yukinari

NK Cell (voice)

Yusuke Kobayashi

Average Cell (voice)

Mamiko Noto

Narrator (voice)