Casting principal
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)
Maria Naganawa
Platelet 'Leader' (voice)