A middle schooler. He dislikes women but is fine with close friends. He doesn't even see Rafsa as a girl. He's good at drawing, but always says his twin brother is better. He is incredibly clever; he can pick a lock with just a long object. He's a total weakling and gets bullied often, but he wins every time using his wits. He has a great memory and can memorize a book just by skimming it. He's half out of his mind, always acting with the energy of a drunk person. His relationship with his twin is like any other brothers, but the younger one is stronger. They prank each other a lot.

Chwi Mudeung's twin brother. They look so much alike it's hard to tell them apart, but strangely, the younger brother is more popular. He is very cold and distant (a total iron wall). Unlike Chwi Mudeung, he is quiet and quite strong. Like his brother, he loves drawing.

He acts tough relying on the big guy next to him. He's close with high school bullies and hangs out with the Shorty Bully. He is terrified of Young-jjang.

She becomes a mad dog when she gets angry. She is so close with Chwi Mudeung and his brother that they don't even view each other as opposite genders.

She can lift a tree with one hand and smash a chalkboard or a desk. She's so strong that even people in the military would be amazed. She hates bullies and parents who only take their own children's side, and she especially dislikes high school bullies.

He is very strong (his grip strength was 65 in elementary school), though weaker than the Home Ec teacher. He is extremely kind. He's handsome and smart, making him popular, but he rejects everyone because of his studies. He goes to the same academy as Chwi Mudeung, so they are close. He absolutely loathes bullies and punishes them immediately. He's the person all bullies fear. He handles them easily. He is a cold, 'iron wall' guy.

The strongest among the bullies (but way weaker than Young-jjang). He bullies Chwi Mudeung in a group of three. He's dead meat if Young-jjang catches him.

He bullies Chwi Mudeung, but it deals zero damage (though he mistakenly thinks he's hurting him). He is terrified of Young-jjang.

He is benevolent and kind. He isn't strong, but he can calm the Home Ec teacher down with words.

Chwi Mudeung's very close friend. She also doesn't care about gender roles and has a boyfriend. Chwi Mudeung set them up and gives relationship advice to both her and her boyfriend. Because Chwi Mudeung took care of the clumsy Golgye so much before she had a boyfriend, his nickname is 'Golgye's Dad'.