 Kana HanazawaRed Blood Cell AE3803 (Erythrocyte) (voice) | Red Blood Cell AE3803 (Erythrocyte) (voice) |
 Tomoaki MaenoWhite Blood Cell U-1146 (Neutrophil) (voice) | White Blood Cell U-1146 (Neutrophil) (voice) |
 Akira IshidaCancer Cell (voice) | Cancer Cell (voice) |
 Saori HayamiRegulatory T Cell (voice) | Regulatory T Cell (voice) |
 Daisuke OnoKiller T Cell (voice) / Memory T Cell (voice) | Killer T Cell (voice) / Memory T Cell (voice) |
 Toa YukinariNK Cell (voice) | NK Cell (voice) |
 Kikuko InoueMacrophage (voice) | Macrophage (voice) |
 Maria NaganawaPlatelet 'Leader' (voice) | Platelet 'Leader' (voice) |
 Yusuke KobayashiOrdinary Cell (voice) | Ordinary Cell (voice) |
 Yu-ri YoshidaBlack Lactic Acid Bacterium (voice) | Black Lactic Acid Bacterium (voice) |
 Rie TakahashiRed Lactic Acid Bacterium (voice) | Red Lactic Acid Bacterium (voice) |
 Natsumi FujiwaraPanda Lactic Acid Bacterium (voice) | Panda Lactic Acid Bacterium (voice) |
 Yurika KuboDappled Lactic Acid Bacterium (voice) | Dappled Lactic Acid Bacterium (voice) |
 Mamiko NotoNarrator (voice) | Narrator (voice) |
