Kumiko Watanabe as Sergeant Keroro (voice)

Etsuko Kozakura as Private Second Class Tamama (voice)

Jouji Nakata as Corporal Giroro (voice)

Takehito Koyasu as Sergeant Major Kururu (voice)

Takeshi Kusao as Lance Corporal Dororo (voice)

Houko Kuwashima as Fuyuki Hinata (voice)

Chiwa Saito as Natsumi Hinata (voice)

Akiko Hiramatsu as Aki Hinata (voice)