Obsazení

• Kana Hanazawa — Erythrocyte / Red Blood Cell
• Tomoaki Maeno — Neutrophil / White Blood Cell
• Daisuke Ono — Killer T Cell
• Maria Naganawa — Platelet
• Kikuko Inoue — Macrophage
• Saori Hayami — Regulatory T Cell
• Takahiro Sakurai — Helper T Cell
• Nobuhiko Okamoto — Dendritic Cell
• Anzu Haruno — Sub-leader Platelet (Season 2)
• Manaka Iwami — Ushiromae-chan (Backward Cap Platelet)
• Mutsumi Tamura — Naive T Cell
• Kenji Nomura — Effector T Cell
• Toa Yukinari — NK Cell
• M・A・O — Eosinophil
• Tomokazu Sugita — Basophil
• Yusuke Kobayashi — General Cell
• Yuichi Nakamura — Memory Cell
• Ayako Kawasumi — Mast Cell
• Shouya Chiba — B Cell
• Yuhko Kaida — Megakaryocyte (Season 2)
• Aya Endo — Senpai Red Blood Cell
• Yui Ichikawa — Junior Red Blood Cell
• Akira Ishida — Cancer Cell
• Hiroyuki Yoshino — Pneumonia Coccus