Speech Style/Habits: Refers to himself as "this humble one" and addresses others as "Guest My Lady (or Young Master), it is I." Rank: Lance Corporal Personality: Slightly timid, lacks presence, and cries often. - Ninja - Ninja mask - Medium-length hair in a half-up ponytail - Light blue hair - Male - The ultimate assassin / The ultimate ninja

Speech Style/Habits: Laughs like "Ku-ku-ku!" Rank: Sergeant Major Personality: Gloomy and quite a genius - Scientist/Doctor - Glasses - Yellow hair - Male

Speech Style/Habits: Calls Natsumi "Lady Natsumi!" Personality: Playful and sly Rank: Sergeant - Green idiot frog - Sly man - Sergeant - Green hair - Male

Speech Style/Habits: His voice trembles only when Natsumi is around (because he likes her). Personality: Tsundere, prickly Rank: Corporal - Independent - Prickly bottom - One-sided crush - Red hair - Male

Speech Style/Habits: Calls Keroro "Sergeant Keroro, sir~!" in a slightly cute, aegyo-filled tone. Personality: Sly, playful, innocent but suddenly snaps and changes personality. Rank: Private Second Class - Innocent - Youngest child vibe - Sudden personality shifts - Navy blue hair - Male - Currently in the middle of getting caught after bluffing big time to Taruru.

Speech Style/Habits: Uses a slightly cute tone in front of Dororo. Personality: Eccentric and innocent, making her cute. - Dororo's partner - Ninja - Female - Platonic male-female friend relationship with Dororo.

Personality: Changes personality only for Tamama, kind to Fuyuki. - Crush on Fuyuki - Tamama's partner - Light blue hair - Female

Speech Style/Habits: Calls Keroro by the nickname "Hey, stupid frog!" Personality: Energetic and truly scary when angry. - Pink hair - Don't mess with her or you'll pay for it - Pigtails - Female

Speech Style/Habits: Nothing specific / The creator doesn't know well. Personality: Kind and very curious. - Navy blue hair - Natsumi's younger brother - Male

Speech Style/Habits: As Tamama's disciple, he calls Tamama "Master!" Personality: Oblivious, easygoing, and slightly annoying (just my personal opinion T_T). - Tamama's disciple - Believes in Tamama's bluffs.