Birthday (Earth Standard) December 9th Species Keronian Place of Birth Planet Keron, Toad Nebula Age Over 10,500 years old Rank: Sergeant Affiliation Keroro Platoon - Platoon Leader Physical Height 55.5cm Weight 5.555kg Blood Type O Family Father, Mother Human Partner: Fuyuki Hinata Aliases Keroro, Sergeant, Sarge, Leader, Stupid Frog Likes Fuyuki Hinata, Gundam plastic models, anime, tokusatsu, manga, starfruit, money, planning invasions, Pekopon (Earth), console games, banana peels Dislikes Natsumi's scolding, housework, Giroro's nagging to invade, acts that interfere with the invasion (triggered by Natsumi), Space Police, his father (scary) Image Color Green A playful and immature personality.

Former Name: Zeroro Age Over 10,500 years old Rank: Lance Corporal Alias: X-1 Vampire Squad Assassin First Person: Soin (Humble 'I') Physical Height 55.5cm Weight 5.555kg Blood Type A Affiliation Keroro Platoon - Assassin Family Mother, Father, Younger Brother Human Partner Koyuki Azumaya Aliases Lance Corporal Dororo, Dororo, Dororo-senpai, Oppa, Zeroro, Lance Corporal Zeroro Likes Being told he's cool, having a presence, Keroro calling him a friend, anything he can drive, Keroro, Koyuki Azumaya, peace, Earth's nature, natto, friends and platoon members Dislikes Keroro going out without him, Keroro ignoring him, old traumas regarding Keroro, being left behind while others have fun, Keroro using him, robots Image Color Blue A quiet and sensitive personality. Uses archaic/polite speech (e.g., I am fine... I thank you, etc.)

Age At least 8,000 years old Rank: Sergeant Major Blood Type: AB Physical: Height 55.5cm, Weight 5.555kg Affiliation Keroro Platoon - Operations Communications Officer (Tactical Advisor) Family: Unknown Human Partner: Mutsumi Saburo Aliases Sergeant Major, Sergeant Major Kururu, Kururu, Gloomy Curry Guy Likes: Curry, tomato gratin, borscht, Giroro, Saburo, things that are evil-natured Dislikes: Exercise Image Color: Yellow A gloomy and perverted personality.

Birthday (Earth Standard) September 20th Species: Keronian Place of Birth: Planet Keron, Toad Nebula Age Over 10,500 years old Rank: Corporal Affiliation Keroro Platoon - Main Combatant (Mobile Infantry) Physical Height 55.5cm Weight 5.555kg Blood Type: A Family Father, Mother, Older Brother Human Partner: Natsumi Hinata Aliases: Giroro, Corporal Giroro, Mr. Giroro, Corporal Alias: The Red Devil of the Battlefield Likes Natsumi Hinata, cats, roasted sweet potatoes, trains, cleaning guns, big-gun ideology, acting like a soldier, interfering with Keroro, friends and platoon members, weapons Dislikes Things that put Natsumi in danger, Keroro being lazy about invasion activities, ghosts, sea cucumbers, things that put cats in danger, Valentine's Day Image Color: Red Speech: Standard A blunt and tsundere personality.

Age: Over 3,000 years old Rank: Private Second Class Gender: Male Physical: Height 55.1cm, Weight 5.55kg Blood Type B Affiliation Keroro Platoon - Support / Shock Trooper Aliases Tamama, Private Tamama Likes Sweets, snacks, bread, his platoon members including the Sergeant Dislikes Women who like Keroro Image Color: Black A cute personality with a split persona.

Age: 14 Height: 160cm Aliases Miss Natsumi Family Grandmother, Father, Mother Aki Hinata, Younger Brother Fuyuki Hinata Likes Mutsumi-senpai (623), Giroro, exercise Dislikes Keroro, mollusks, ghosts A fearless and hot-tempered personality.

Age: Mid-30s Occupation: Manga Editor Aliases: Ma'am, Mom (Fuyuki and Natsumi only) Family: Husband, Fuyuki Hinata, Natsumi Hinata Likes Family Dislikes Animals (specifically vertebrates) A clumsy and kind personality.

623 Age: 15 (Anime) Occupation: Radio DJ Height: 168cm (Anime) Weight: 59kg Aliases Mutsumi-senpai (Natsumi and Fuyuki only), Master Mutsumi (Keronians) A playful and mature personality.

Age: 14 Occupation: Ninja Aliases: Miss Koyuki (Keronians only) Likes Natsumi Hinata Dislikes Others who hit on Natsumi A kind and quiet personality.

Age: 13 Height: 152.5cm Aliases: Master Fuyuki (Keronians only), Young Master Fuyuki Likes Keroro, ghosts, aliens, and other occult things Dislikes Exercise, insects A kind and brave personality.