The theatrical episode will cover events from the fifth volume of the manga.

Kana Hanazawa
as Red Blood Cell AE3803 (Erythrocyte) (voice)

Tomoaki Maeno
as White Blood Cell U-1146 (Neutrophil) (voice)

Akira Ishida
as Cancer Cell (voice)

Saori Hayami
as Regulatory T Cell (voice)

Daisuke Ono
as Killer T Cell (voice) / Memory T Cell (voice)

Toa Yukinari
as NK Cell (voice)

Kikuko Inoue
as Macrophage (voice)

Maria Naganawa
as Platelet 'Leader' (voice)

Yusuke Kobayashi
as Ordinary Cell (voice)

Yu-ri Yoshida
as Black Lactic Acid Bacterium (voice)