Gender: Male Personality: Indecisive + Childish Species: Keronian (Frog humanoid) Rank: Captain -> Sergeant (Demoted) Family: Father, Mother Affiliation: Keroro Platoon Title: Leader Likes: Gundam plastic models, Starfruit, Banana peels Dislikes: His father (is terrified of him) Traits: Once called a legendary commander. Originally a Captain but demoted to Sergeant. Uses the First Commander's Command authority, which turns him back into his Captain-era self (very scary). Leader of the Keroro Platoon.

Gender: Male Personality: Grumpy + Tsundere Species: Keronian (Frog humanoid) Rank: Second Lieutenant -> Corporal (Demoted) Family: Father, First Lieutenant Garuru (Older brother) Affiliation: Keroro Platoon Title: Mobile Infantry Likes: Roasting sweet potatoes, Cats Dislikes: Anything that puts cats in danger, Sergeant Keroro slacking off Traits: There is a large age gap with First Lieutenant Garuru. He calls Garuru by name and gets extremely flustered if he accidentally calls him "Brother." Hates Kururu. Mostly speaks informally. Member of the Keroro Platoon. Can disassemble and reassemble a gun in mid-air. Has a scar over one eye.

Gender: Male Personality: Dual personality Species: Keronian (Tadpole humanoid) Affiliation: Keroro Platoon Title: Shock Trooper Likes: Keroro, Snacks (Candy, cookies, bread, etc.) Dislikes: Keroro being with other women Traits: Bisexual, very jealous. Usually bright and polite. Mentor to Senior Private Taruru. Member of the Keroro Platoon.

Gender: Male Personality: Gloomy + Perverted Species: Keronian (Frog humanoid) Rank: Major -> Sergeant Major (Demoted) Affiliation: Keroro Platoon Title: Operations Strategist Likes: Curry, Giroro, Others' suffering Dislikes: Pure things Traits: Was a Major but got demoted to Sergeant Major after being caught hacking the Keron Army network. Likes Corporal Giroro. Extremely intelligent. Adds "Ku-ku-ku" to the end of sentences when in a good mood. Physically weak. Curry addict. Member of the Keroro Platoon. Wears swirl glasses.

Former Name: Private Second Class Zeroro Gender: Male Personality: Pacifist Species: Keronian (Frog humanoid) Family: Father, Mother, Younger brother Former Affiliation: Assassin Unit X-1 Vampire Squad Present Affiliation: Keroro Platoon Title: Assassin Likes: Natto, Green tea, Nature Dislikes: Being left out, Bullying Traits: Compassionate and a crybaby. Has no presence. Suffers from congenital space asthma, so he wears a gray mask covering his mouth and nose and never takes it off. Was a student of Captain Jirara in the X-1 Platoon. Member of the Keroro Platoon. Speech Style: Archaic/Hao-che (e.g., "This humble one is the Keroro Platoon's assassin.")

Gender: Male Personality: Blunt + Tsundere Species: Keronian (Frog humanoid) Family: Father, Corporal Giroro (Younger brother) Former Affiliation: Keroro Platoon Present Affiliation: Garuru Platoon Title: Leader Likes: Corporal Giroro calling him "Brother," his platoon members, Nursing Officer Pururu Traits: Top-tier performance and skills make him very popular. Very handsome. Bad at using chopsticks. Has a thing with Nursing Officer Pururu. Takes good care of Lance Corporal Zoruru. Appears to dislike Corporal Giroro on the outside, but cares for him more than anyone and loves it when Giroro accidentally calls him "Brother" (a blunt brother-lover). Values his platoon members like family (except Master Sergeant Kitsutsu). Leader of the Garuru Platoon. Former member of the Keroro Platoon. Rival of Captain Jirara.

Gender: Female Personality: Kind + Friendly Species: Keronian (Tadpole humanoid) Affiliation: Garuru Platoon Title: Nursing Officer Likes: Guest, Garuru Dislikes: Being called an old lady Traits: Responsible for rear support. Very beautiful. Looks after Lance Corporal Zoruru well. Kind and has a romantic tension with First Lieutenant Garuru. Very beautiful and popular.

Gender: Male Personality: Mischievous + Childish slanderer Species: Keronian (Frog humanoid) Affiliation: Garuru Platoon Title: Shock Trooper Likes: Private Second Class Tamama Traits: Junior and student of Private Second Class Tamama, whom he calls "Master." Has freckles and sanpaku eyes.

Gender: Male Personality: Gloomy + Boastful Species: Keronian (Tadpole humanoid) Affiliation: Garuru Platoon Title: Operations Strategist Likes: Fast food (especially burgers), Guest Dislikes: Sergeant Major Kururu Traits: Hates Kururu because he always loses to him. Adds "Pu-pu-pu" to the end of sentences when in a good mood. Hiccups when surprised. Very close with Guest. Wears a green helmet and triple-concentric circle glasses.

Gender: Male Personality: Taciturn + Selfish Species: Keronian (Frog humanoid) Former Affiliation: Assassin Unit X-1 Vampire Squad Present Affiliation: Garuru Platoon Title: Assassin Dislikes: Private Second Class Zeroro, Master Sergeant Kitsutsu Traits: Hates Lance Corporal Dororo so much that his life goal is to defeat him. Half of his body is mechanized, so his voice has a mechanical tone. Has even less presence than Dororo. Covers his mouth and nose with bandages. Speaks informally. Arrogant but cute. Has the ability to create his own sub-space. Was a student of Captain Jirara in the X-1 Platoon. Calls Dororo "Private Second Class Zeruru."