Gender: Female Height/Weight: 176cm, 68kg Age: 34 Features: Wears glasses and has a black bob. She is feared by the delinquents, but she is actually quite cheerful, easygoing, and responsible.

Gender: Male Height/Weight: 187cm, 78kg Age: 17 Features: A cold handsome boy with dark blue hair and blue eyes. He is blunt and excels at his studies. Even the delinquents can't touch him, earning him the title of 'Rank 0.' While usually stoic, he is kind-hearted, though he becomes terrifying if someone crosses the line. Surprisingly, he is afraid of holding small creatures for fear they might pop.

Gender: Male Height/Weight: 191cm, 81kg Age: 38 Features: Black hair and black eyes with sharp features. He openly discriminates against students based on their grades and is incredibly intimidating.

Gender: Male Height/Weight: 188cm, 79kg Age: 17 Features: Pale skin, black hair, and black eyes. He is Kim Min-gi's twin brother. Unlike his brother, he is quiet and is rumored to be the school's 'mad dog.'

Gender: Male Height/Weight: 182cm, 73kg Age: 17 Features: Red hair and red eyes. He is a simple-minded, fierce-looking delinquent. However, he is surprisingly shy.

Gender: Male Height/Weight: 178cm, 63kg Age: 17 Features: Dark brown hair and black eyes. He is short but is a delinquent. The catch is that he can't fight at all. He's just cute.

Gender: Female Height/Weight: 175cm, 58kg Age: 17 Features: Blue hair and blue eyes. She is extremely competitive and hates delinquents. She is very close to Min-jae, which means they bicker constantly. Like Min-jae, she is rumored to be a 'mad dog' at school. She is also close with Min-gi.

Gender: Male Height/Weight: 185cm, 74kg Age: 31 Features: Brown hair and a cheerful personality. If the delinquents skip night self-study, he skips with them. It's impossible to tell what he's thinking.

Gender: Male Height/Weight: 181cm, 75kg Age: 17 Features: Black hair and black eyes. He is a smart, calculating, and skilled fighter who acts as a sly delinquent.

Gender: Male Height/Weight: 177cm, 67kg Age: 17 Features: Tanned skin, pink hair, and bright red eyes. He has a cheerful personality but is an outcast at school. Despite this, he remains lighthearted and playful. He is somewhat acquainted with Rank 0 and is very close to his younger brother, Min-jae. Unlike Min-jae, he is very loud and has quite a few friends.