Gender: Female Features: Pink hair in pigtails. She calls Keroro a stupid frog. Fuyuki is her younger brother. She doesn't realize Giroro likes her and just treats him like Keroro. She isn't very interested in Giroro. Age: 14 (8th Grade) TMI: She is in a subtle relationship with Giroro, who has a crush on her, but she doesn't care much for him. She has a crush on Saburo, and is the object of Koyuki's affection. (She doesn't swear.) She uses polite speech with Saburo. She calls Saburo 'Saburo-senpai'.

Gender: Male Features: Short dark blue hair. He casually calls Keroro 'Sergeant'. Age: 13 (7th Grade) TMI: He is Momoka's crush. He cherishes the Sergeant. (He doesn't swear.)

Gender: Male Features: About 55.5cm tall with a round green body and a 2-head-tall proportion. He wears a yellow hat with a red star and loves Gundam plastic models. He uses polite speech only with Natsumi and Fuyuki, and speaks casually to everyone else. He speaks without any specific laughter style! Age: 10,500 years old TMI: He feels relieved only after stepping on a banana peel. He is very close with Angol Mois. He calls Natsumi 'Lady Natsumi' and Fuyuki 'Master Fuyuki'. (He doesn't swear.) (Everyone just calls him Keroro.)

Gender: Male Features: Usually cute, but turns fierce and uses the 'Tamama Impact' technique during combat. He is the only one who is a tadpole, so he has a tail. He calls Keroro 'Sergeant~'. He is dark blue, 55.5cm tall, and has a yellow hat with a Japanese beginner mark. Age: 3,500 years old?? (Everyone just calls him Tamama.) TMI: Although male, he likes Keroro and is jealous of Mois because she gets along well with him lol. He lives with Momoka. (He doesn't swear.)

Gender: Male Features: Round red body with a maroon hat and a yellow skull mark. He mainly handles weapons. He doesn't live inside the Hinata house but lives in a tent outside. He's actually quite shy. He doesn't show his feelings for Natsumi well. Age: 10,500 years old TMI: He has a crush on Natsumi Hinata. He likes sweet potatoes but hates sea cucumbers and ghosts (he's a scaredy-cat). He dislikes Saburo and Koyuki, who are close to Natsumi. (He doesn't swear.) (Everyone just calls him Giroro.)

Gender: Male Features: Round yellow body wearing glasses. He has an orange hat with a yellow snail shell-like pattern. He laughs strangely like 'ku-ku-ku', but he is a genius in his own way. He is partners with Saburo. He speaks casually. He doesn't come to the Hinata house often, just pops in occasionally while wandering around. (Everyone just calls him Kururu.) Age: 8,000 years old TMI: He is a curry lover. (He doesn't swear.)

Gender: Male Features: Round blue body with a white hat featuring a red shuriken pattern. He uses archaic ninja speech ending in '~de gozaru'. He is an incredible assassin. Age: 10,500 years old TMI: He is partners with Koyuki and lives with her. (He doesn't swear.) (Everyone just calls him Dororo.)

Gender: Female Features: A ninja who travels with Dororo. She has hair darker than seaweed tied in a ponytail. She doesn't live at the Hinata house; she lives separately. She doesn't appear very often. Age: 14 (8th Grade) TMI: She likes Natsumi🩷 (She doesn't swear.)

Gender: Male Features: The host of the radio channel 623 and Natsumi's crush. He has greyish hair. He also doesn't live at the Hinata house. He is a character who doesn't appear often. Age: 15 (9th Grade) TMI: He feels like a partner to Kururu, but they don't live together. He's a character who appears occasionally!!! He always wears a light yellow beanie. (He doesn't swear.)

Gender: Female Features: Tamama's partner who has a crush on Fuyuki. She has light blue short hair. She also!! doesn't live with them and doesn't appear often!! Age: 13 (7th Grade) TMI: She is from an incredibly wealthy family and has a butler named Paul. (She doesn't swear.) Because she likes Fuyuki, he is the only human she speaks casually to; she uses polite speech with everyone else due to the age difference,,