Mei Nagano as Red Blood Cell / AE-3803

Takeru Satoh as White Blood Cell / U-1146

Mana Ashida as Niko Urushizaki

Sadao Abe as Shigeru Urushizaki

Koji Yamamoto as Killer T Cell

Riisa Naka as NK Cell

Wakana Matsumoto as Macrophage

Maika Pugh as Platelet

Shota Sometani as Helper T Cell

Kyoko Fukada as Hepatocyte

Rihito Itagaki as Red Blood Cell

Ryo Kato as Senior Red Blood Cell

Seishirou Katou as Arata Takeda

Ainosuke Kataoka as Pneumonia Coccus

Shinya Niiro as Streptococcus Pyogenes

Maju Ozawa as Staphylococcus Aureus

Fukase as Leukemia Cell

Haru Iwakawa as Leukemia Cell As Myelocyte

Ken Mitsuishi as Trucking Company President

Shingo Tsurumi as Doctor

Takashi Tsukamoto as White Blood Cell

DJ Koo as Neuron

Rina Takahashi as Regulatory T Cell

Ryoko Yuui as Yuko Urushizaki

Wataru Ichinose as External Anal Sphincter

Izutani Rana as Platelet

Ameri Isomura as Platelet

Ema as Platelet

Haruna Hana as Platelet

Yuzu Yumoto as Platelet

Karen Amano as Platelet

Ishizuka Nanako as Platelet

Rinko Suzuki as AE-3803 (Child)

Riko Suzuki as AE-3803 (Young)

Akari Noda as Niko Urushizaki (Child)

Renwa Sato as Platelet

Osako Suzu as Platelet

Atsuko Hirata as Complaining Cell

Unabara Haruka as Aged Red Blood Cell

Ryusei Araoka as Internal Sphincter

Yoshihiro Kurita as Red Blood Cell

Ben Yuzawa as Red Blood Cell

Zen Shirahige as Myelocyte

Akito Nakamura as Myelocyte

Nakamura Yuto as Myelocyte

Kento Miura as Red Blood Cell

Shinichi Shirahata as Influenza Virus

Mari Yamamoto as Influenza Virus