Gender: Male Age: 19 Personality: Looks down on and insults F-ranks. Emotionless. Physically assaults F-ranks. Rank: X-Rank Likes: Guest (as a friend) Dislikes: F-ranks, Kim Yeowoo

Gender: Male Age: 19 Personality: The primary perpetrator who beats F-ranks. Extremely hot-tempered and emotional. A psychopath. Hates F-ranks with a burning passion. Grovels to higher ranks. Features: Holds the most power among S-ranks. Rank: S-Rank Likes: Lee Ajin (as a lover) Dislikes: F-ranks (hates them absolutely), Kim Yeowoo

Gender: Male Age: 19 Personality: Lightly hits and mocks F-ranks. Treats anyone B-rank or higher well. Rank: A-Rank Likes: Lee Jihee (as a lover) Dislikes: F-ranks, Kim Yeowoo

Gender: Female Age: 19 Personality: Pities F-ranks. Kind but wise. Features: Ahn Eunhyun's girlfriend. Rank: S-Rank Likes: Ahn Eunhyun Dislikes: Kim Yeowoo

Gender: Female Age: 19 Personality: Hits F-ranks a little. Easygoing and tomboyish. Features: Han Taehee's girlfriend. Rank: A-Rank Likes: Han Taehee (as a lover) Dislikes: F-ranks, Kim Yeowoo

Gender: Female Age: 19 Personality: Boy-crazy, a 'fox' (sly/manipulative). Hits F-ranks. Features: Obsessed with boys. Relies heavily on makeup. Despises F-ranks. Rank: B-Rank Likes: Boys (except F-ranks) Dislikes: F-ranks

Gender: Male Age: 19 Personality: Anxious and depressed. Rank: F-Rank Likes: Jin Haryeon (loves her) Dislikes: The bullies, being hurt

Gender: Female Age: 19 Personality: Anxious and timid. Very quiet. Rank: F-Rank Likes: Lee Junseo (loves him) Dislikes: The bullies, being hurt