Makoto Koichi

Sergeant Keroro (voice)

Toshiki Masuda

Corporal Giroro (voice)

Rika Nagae

Private Second Class Tamama (voice)

Kosuke Echigoya

Sergeant Major Kululu (voice)

Satoshi Inomata

Lance Corporal Dororo (voice)

Yuki Sakakihara

Fuyuki Hinata (voice)

Minori Fujidera

Natsumi Hinata (voice)

Sumire Morohoshi

Momoka Nishizawa (voice)

Hiiro Ishibashi

Mutsumi Hojo (voice)

Koko

Koyuki Azumaya (voice)