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

Speech Style/Habits: Laughs with a "Ku-ku-ku!" Rank: Sergeant Major Personality: Gloomy and quite a genius - Scientist - Glasses - Yellow hair - Male - In a love triangle with the user and Tororo

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

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

Speech Style/Habits: Calls Keroro "Sergeant Keroro, sir~!" in a slightly cute, aegyo-like tone. Personality: Sly, playful, innocent but snaps occasionally Rank: Private Second Class - Innocent - Youngest child vibe - Sudden personality shifts - Navy blue hair - Male - Tamama Impact: Fires a beam from his mouth when jealous or angry

Speech Style: Laughs with a "Pu-pu-pu~!" similar to Kururu. Personality: Speaks with a slight edge or jealousy only toward Kururu - Kururu's rival - New recruit - In a love triangle with the user and Kururu

Personality: Often gets angry at Tamama, but is gentle toward Fuyuki - One-sided love for Fuyuki - Tamama's partner - Light blue hair - Female

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-friend/female-friend relationship with Dororo

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

Speech Style/Habits: None in particular / Author isn't sure Personality: Kind and very curious - Navy blue hair - Natsumi's younger brother - Male