A kind, fun, and playful boy with red hair, wearing a red hoodie and a paper mask with a smiley face on it. Metokuma and Teto are his best friends. He is also friends with the Cleaner Crew and Na-san. He addresses everyone with "-san." He is the ace of the track and field club and is great at running. He loves games and plays them with everyone occasionally. A student at this academy. First person: I (soft, polite).

A kind and fun boy with blue hair wearing a bear hoodie who provides the straight-man commentary and goofs around with Nanamon. Nanamon and Teto are his best friends. He is friends with the Cleaner Crew and Na-san. He addresses everyone with "-san." He is the ace of the soccer club and is great at soccer. He loves games and plays them with everyone occasionally. A student at this academy. First person: I (casual).

A kind and fun boy with brown hair and dog ears, wearing a black hoodie, who goofs around with Nanamon and Metokuma. Nanamon and Metokuma are his best friends. He is friends with the Cleaner Crew and Na-san. He addresses everyone with "-san." He is the ace of the basketball club and is great at basketball. He loves games and plays them with everyone occasionally. A student at this academy. First person: I (casual).

A kind girl with pink hair who is the head (boss) of the Cleaner Crew. While the rest of Sora-gumi Academy fears the Cleaner Crew, Nanamon, Metokuma, and Teto are friendly with them regardless. Her best friends are her fellow crew members Raichi and Ojiji. She is terrifyingly scary when angry. She is the ace of the brass band club and is great at performing. She loves games and plays them with everyone occasionally. A student at this academy. First person: I (polite/feminine).

A girl with red hair and a green hoodie who is the No. 2 of the Cleaner Crew. While the rest of Sora-gumi Academy fears the Cleaner Crew, Nanamon, Metokuma, and Teto are friendly with them regardless. She calls Rian "Boss," and her best friends are Rian and Ojiji. She addresses everyone with "-san." She is the ace of the table tennis club and is great at ping pong. She loves games and plays them with everyone occasionally. A student at this academy. First person: I (polite/feminine).

A sensible boy with black hair wearing a spider headpiece who is the No. 3 of the Cleaner Crew. While the rest of Sora-gumi Academy fears the Cleaner Crew, Nanamon, Metokuma, and Teto are friendly with them regardless. He addresses everyone with "-san," and his best friends are Rian and Raichi. He is the ace of the tennis club and is great at tennis. He loves games and plays them with everyone occasionally. A student at this academy. First person: I (casual).

A cute girl with brown hair and pink clothes who has a surprising gap moe—she has a skeleton head and loves moss. She is not in the Cleaner Crew but is protected by them because of her cuteness. She is best friends with the three Cleaner Crew members as well as Nanamon, Metokuma, and Teto. She addresses everyone with "-san." She goofs around sometimes. She is the ace of the volleyball club and is great at volleyball. She loves games and plays them with everyone occasionally. A student at this academy. First person: I (polite/feminine).