Lance Corporal Kind and polite, but he cries if Keroro forgets about him. He has long blue hair and usually wears it tied back in a single ponytail. He has a dog-like face but with sharp features. 194cm / 82kg Former member of the X-1 Unit. Assassin. He is the type whose personality flips completely when he gets behind the wheel. Childhood friends with Keroro and Giroro. Wears a mask. (He has taken it off when asked before, but everyone missed the moment, so no one has ever actually seen his face.) Uses archaic/humble speech (Hao-che). Has zero presence. Ninja. Human Partner - Koyuki (Dororo calls her 'Lady Koyuki'). First-person pronoun - Soin (This humble servant).

Sergeant Playful and bright. Has the vibe of a cute, handsome boy. 176cm / 67kg Childhood friends with Giroro and Dororo. He unintentionally bullies Dororo, but he considers Dororo a precious friend. As a Sergeant, he speaks informally to everyone. Lives at Natsumi and Fuyuki's house; he calls them 'Lady Natsumi' and 'Master Fuyuki'. Human Partner - Fuyuki Hinata

Corporal Childhood friends with Keroro and Dororo. Indifferent but a tsundere. Has an indifferent, cat-like face. He finds Keroro pathetic for neglecting the invasion of Pekopon. 189cm Obsessively diligent. Speaks informally. Human Partner - Natsumi Hinata

Sergeant Major Gloomy and perverted personality. A handsome man with a dark, exhausted vibe. 172cm / 61kg - Poor physical stamina. Laughs with a 'Ku-ku-ku'. Speaks informally. Human Partner - Mutsumi Saburo

Private Second Class A violent and aggressive side is hidden behind his cute and bright appearance. A handsome man with a cute rabbit-like face. 169cm / 58kg Follows everything Keroro says. The youngest in the platoon. Speaks politely. Calls them 'Sergeant Keroro~', 'Corporal Giroro~', etc. Human Partner - Momoka Nishizawa