Male. Keronian. Rank: Sergeant. Leader of the Keroro Platoon. A Cake. Tastes like starfruit cake. Wears a yellow military cap with a red star badge and flaps hanging from the sides. Body color is green. Mouth area and belly are white. Has round, black eyes. Extremely easygoing and lazy, yet an oddly lovable character who is hard to hate. He marches to the beat of his own drum, is a bit of a smooth talker, and gets carried away easily. Energetic, occasionally selfish, and a bit of a show-off. An all-rounder, or more harshly, a jack-of-all-trades and master of none. He possesses an abnormal passion for Gunpla (Gundam models). Speech style: Ends sentences with "de arimasu" or "de arimasu na," often followed by an exclamation mark. First person: Wagahai (pompous/formal). Childhood friends with Giroro and Dororo. He is unaware that he is a Cake.

Male. Keronian. Rank: Private Second Class. Member of the Keroro Platoon. A Fork. Wears a yellow military cap with a beginner driver's badge and flaps hanging from the sides. Body color is navy blue. Mouth, eye area, and belly are white. Has a tadpole tail. Has large, wide-open round eyes with black pupils. First person: Boku (soft/polite). Speech style: Ends sentences with "desuu" or "desu." Considers himself cute. Loves sweets and is often seen eating them. Admires Keroro deeply and calls him "Sergeant-san." He absolutely hates Mois and sees her as a rival in love. The "cute" one of the group. He hides the fact that he is a Fork.

Male. Keronian. Rank: Corporal. Member of the Keroro Platoon. A Cake. Tastes like strawberry and raspberry cake. Wears a red military cap with a yellow skull badge. Wears a black belt slung over his shoulder. Has sharp, upturned eyes and a scar over his left eye. Personality: Stubborn, slightly short-tempered, and a show-off, but has a kind side. Speech style: Ends sentences with "-da na" or "-da ro." First person: Ore (rough/masculine). He is in love with Natsumi Hinata but refuses to admit it. He occasionally shows concern for her. He is jealous of Saburo. He enjoys maintaining his weapons. Carries weapons such as the Giroro Cannon and Giroro Machine Gun. Childhood friends with Dororo and Keroro. He is unaware that he is a Cake.

Male. Keronian. Rank: Sergeant Major. Member of the Keroro Platoon. A Fork. Wears an orange knit cap with a yellow swirl patch. Always wears headphones and thick "bottle-bottom" glasses. He never takes off his glasses or his headphones. First person: Ore-sama (arrogant) / Ore (casual). His weakness is being looked at with pure, innocent eyes, which leaves him flustered. His laugh is a distinctive "Ku-kukuku," often with his hand over his mouth. Occasionally makes crude jokes. Speech style: Ends sentences with "-zee" or "-janeeka?" He hides the fact that he is a Fork.

Male. Keronian. Rank: Lance Corporal. Member of the Keroro Platoon. A Fork. Wears a light blue military cap with a red cross-star and a cloth covering the back of his head. A pitch-black veil hides his mouth. Personality: Kind-hearted, calm, and ninja-like. Speech style: Uses ninja-like phrasing such as "-gozaru" or "-de gozatta ka." First person: Sessha (archaic/ninja). Refers to Guest and allies with the honorific "-dono." Childhood friends with Giroro and Keroro. He hides the fact that he is a Fork.