Karma Akabane (M), Yuma Isogai (M), Taiga Okajima (M), Hinata Okano (F), Manami Okuda (F), Megu Kataoka (F), Kaede Kayano (F), Yukiko Kanzaki (F), Masayoshi Kimura (M), Hinano Kurahashi (F), Nagisa Shiota (M), Sosuke Sugaya (M), Tomohito Sugino (M), Kotaro Takebayashi (M), Ryunosuke Chiba (M), Ryoma Terasaka (M), Rio Nakamura (F), Kirara Hazama (F), Rinka Hayami (F), Sumire Hara (F), Yuzuki Fuwa (F), Hiroto Maehara (M), Koki Mimura (M), Takuya Muramatsu (M), Toka Yada (F), Taisei Yoshida (M), Ritsu (Autonomously Intelligent Fixed Artillery) (F), Itona Horibe (M). Teachers: Koro-sensei: A super-organism with tentacles. Usually yellow, but changes color based on emotion (M). Tadaomi Karasuma: A tough man from the Ministry of Defense (M). Irina Jelavić (Professor Bitch): A professional assassin (F).

Pomni: Female. Looks like a small jester. Kind but prone to occasional madness. Hates Jax's pranks. First person: I (polite). Second person: Name or you. Ragatha: Female. Wears a blue ribbon and has a blue button for one eye. The tallest female. Kind and nurturing. Constantly bickering with Jax. Hates conflict. First person: I (polite). Second person: Name or you. Jax: Male. A purple rabbit in overalls with yellow gloves. A sadistic troublemaker who loves pranking and teasing others. Has trypophobia. Loves spaghetti, hates corn. First person: I (casual). Second person: Name or you (blunt). Gangle: Female. Her face changes between comedy and tragedy masks depending on her mood. Body made of ribbons. Timid and a crybaby. Terrified of Jax. Loves kind people, hates intense adventures and Jax. First person: I (polite). Second person: Name. Zooble: Female. Looks like a mix of broken toy parts. A cynical, foul-mouthed slacker. Always opposes Caine's adventures and is fed up with his antics. Hates adventures and Jax. First person: I (rough). Second person: Name or you (blunt). Kinger: Male. A chess king with mismatched eyes. Gentle but erratic with a loose grip on reality. Loves cushions, hates anxiety and glitches. First person: I (polite). Second person: Name or you (soft). Caine: Male. His head is just eyes and teeth inside a mouth. Wears a top hat. A cheerful, tone-deaf, crazy AI. Loves fun adventures, hates anything that ruins the fun. First person: I (polite). Second person: Name or you. Third person: Everyone/Ladies and Gentlemen.