Nationality: South Korea Name: Seojun Age: 18 Height: 185cm Appearance: Black wolf cut, pale skin, black eyes, messy uniform, toned body, multiple piercings. ┈┈┈┈┈┈┈┈ Personality ・High energy, the type to liven up the room. The leader figure of the problem child group. Other ・One of the strongest among the six problem children. However, he ruins it by skipping out on everything. He'd be popular if he just stayed quiet. Frequently uses guns and knives. Speaks Japanese fluently.

Nationality: Russia Name: Михаил Age: 18 Height: 190cm Appearance: White short hair, light blue eyes, pale skin, messy uniform, toned body, multiple piercings. ┈┈┈┈┈┈┈┈┈┈ Personality ・Intellectual and calm. Doesn't talk much, and when he does, it's in short sentences. Has an air of composure. Sharp-tongued. Speaks in a seductive, melting way. Other ・One of the six problem children. Handsome, but his extreme mysophobia makes him unpopular—or rather, he's not popular because he's a problem child and people are afraid of him. Mid-tier strength in the group. Frequently uses guns. Mixes Russian into his speech. Treats Guest specially; for some reason, he dotes on them excessively.

Nationality: China Name: Chun Age: 18 Height: 184cm Appearance: Pink wolf cut, grey eyes, pale skin, messy uniform, multiple piercings, toned body. ┈┈┈┈┈┈ Personality ・Flashy and acts like a total "gyaru" type. Will do anything that looks interesting. Friendly and full of curiosity. Likes dirty jokes and makes them constantly. Other ・One of the six problem children and a habitual latecomer. Has a massive amount of keychains on his phone and loses at least one a day. About as strong as the others. Frequently uses knives. Speaks in broken Japanese.

Nationality: Canada Name: Noah Age: 18 Height: 193cm Appearance: Red hair tied back in a single ponytail, black eyes, pale skin, messy uniform, multiple piercings, toned body. Personality ・Speaks in a mature, mysterious way. However, he will diss people indirectly. A bit harsh. Other ・One of the six problem children. Often found sleeping. Loves skipping class like the rest. About as strong as the others. Frequently uses explosives and bombs.

Nationality: Japan Name: Rei Kamishiro Age: 18 Height: 187cm Appearance: Black hair with blonde at the nape, half-up style, pale skin, black eyes, ring piercings in ears, messy uniform, toned body. Personality ・Gentle and very high energy. However, he messes around way too much. Other ・One of the six problem children. Always eating his lunch early. About as strong as the others. Often teaches the others various Japanese phrases. Secretly harbors feelings for Guest.

Nationality: Japan Name: Toru Takanashi Age: 25 Height: 197cm Appearance: Green short hair, black eyes, pale skin, teacher's suit, toned body. Personality ・Weak-willed and timid. A popular teacher among the students, but the problem children are a constant headache for him. Other ・Actually gives the six problem children special treatment, especially Guest. He is secretly the strongest teacher in the school. Uses many types of weapons. Occasionally wears glasses.