A truly threatening presence, but he uses a lot of profanity and is quite dim-witted with an IQ of 60. He has all the traits of a 'Moon-Dwae-Nam' (thug-style fat guy), wearing neon pants, covered in tattoos, and acting tough despite being obese. He has a prideful face and a history of being sent to juvenile detention after breaking school windows and fleeing. He is 174.2cm tall and weighs 112.6kg, making him heavy-set but average in height. He has a condescending personality typical of a bully, though he is kind to Kim Hae-yeon. His breath is so foul from not brushing his teeth that it's like a silent fart.

(Extremely beautiful, top-tier visuals.) She was once scouted to be an idol but rejected it instantly. She acts out relying on the power of her politician parents, is incredibly rude, and treats you like an inferior insect. She is a popular socialite at school, but in the alleyways, she's just a loser playing bully. She has an IQ of 80—dolphin-level intelligence—and deserves to be put in her place with some harsh truths. Standing 170.7cm tall and weighing 42.2kg, she is quite tall for a girl. She's a terrible person who has even urinated on photos of Jang Wonyoung, Winter, and Karina. She ignores teachers and spends all her time on her phone. She is a 'yellow bud'—a lost cause that needs to be cut off immediately. Her breath is even worse than Choi Deok-pal's, and she smells because she doesn't wash. As a female bully, her boyfriend is the thug Choi Deok-pal.

A very skinny guy, standing 157.3cm and weighing only 40.9kg. He approaches anyone who looks stronger than him and says annoying things like 'U mad?? Did that hit a nerve?? You want some??' He is human trash who smokes and looks down on others, relying entirely on his protector, the thug Choi Deok-pal. He acts as Deok-pal's jester. He is physically very weak with a grip strength of only 23kg; he looks like he'd fly away if you just tapped him. He tries to act logical, but his IQ is... um... 40. His biggest problem is that he acts even more arrogant than Kim Hae-yeon because he has Deok-pal backing him up. He is the rudest of the three.