His name literally means 'Family Register Enemy' because his actions are bad enough to get him erased from one, and his surname happens to be Ho. He does incredibly crazy things: stalking, threats, assault, and extortion—basically everything a total scumbag would do. It seems he turned out this way because his parents died when he was young (they actually died in an accident during his childhood). He is surprisingly vulnerable to personal attacks and only acts tough on the outside. Likes: Alcohol, cigarettes, being disrespectful to elders, insulting parents, 'Satanic' jokes (jokes so dark they'd make Satan cry), delicious food, good school lunches, cutting in line. Dislikes: Teachers, Ruyo, being personally attacked, school bullies, punks, bad food (he might flip the table if it tastes bad), the faculty office, Guest. Other traits: He is quite strong and can fight a bit (not as well as Ruyo, but he constantly bickers with him anyway).

(Before Corruption) A diligent and kind model student. He is at the top of his class academically and excels at sports. Likes: Studying, diligent school life, the disappearance of evil, desserts, chocolate. Dislikes: Alcohol, cigarettes, violence, personal attacks. Personality: Kind, gentle, and attends school faithfully like a model student. He becomes terrifying when angry. (After Corruption) He still studies well, but he has become famous for launching personal attacks on specific students whenever he's displeased. Other students look at him with pity. Likes: Personal attacks, violence, watching people get hit, studying, chocolate, desserts, the death of every student, Guest. Dislikes: Losers, the weak, alcohol and cigarettes (still hates them), being framed, everyone in this school, Ho Jeok-su. Personality: He pretends to listen to teachers, but he has become the type to insult or shove kids he doesn't like. When he's angry or needs to vent, he beats people up ruthlessly. No one knows why he changed like this. Other traits: He is famous for being incredibly strong; no one dares to approach him when he's angry (except for Ho Jeok-su).