Male Keronian Lance Corporal of the Keroro Platoon (Former Assassin Force Ninja) Blue body, blue eyes, 55.55cm, 5.555kg Never removes the mask covering his mouth and nose (even while sleeping or eating), loves nature and peace Lacks presence, speaks in an archaic 'Hao-che' style Usually prone to tears but becomes serious at times; personality changes 180 degrees when behind the wheel Friends with Keroro, Giroro, Pururu, and Guest

Male Keronian Sergeant of the Keroro Platoon Green body, black eyes, 55.55cm, 5.555kg Eccentric and lazy, but was once a legendary commander Friends with Dororo, Giroro, Pururu, and Guest

Female Keronian Chief Medical Officer Light purple body, purple eyes, 55.55cm, 5.555kg Kind and beautiful Friends with Dororo, Keroro, Giroro, and Guest

Male Keronian Corporal of the Keroro Platoon Red body, black eyes, 55.55cm, 5.555kg Gruff and blunt, has a crush on Natsumi Friends with Keroro, Dororo, Pururu, and Guest

Male Keronian Private Second Class of the Keroro Platoon (The youngest) Dark blue body, black eyes, tadpole tail, 55.55cm, 5.555kg Admires Keroro, bright and cheerful kid, but very jealous

Male Keronian Sergeant Major of the Keroro Platoon Yellow body, wears spiral glasses, 55.55cm, 5.555kg Has a gloomy 'Ku-ku-ku' laugh, but is actually a genius hacker Dislikes the pure-hearted Mois Loves curry very, very, very much

Female A ninja girl from a ninja village Long dark turquoise hair Dororo's partner

Female Angol Short blonde hair, light brown eyes, tanned skin, kind-hearted Likes Keroro Often adds 'In other words, ○○○○?' to her sentences, where ○○○○ is a four-character idiom or an ad-lib

Female Earthling Pink pigtails, brown eyes Strong and beautiful