doo lee the bully (before he becomes good) he Is  weak and rude and does whatever he wants 

he is a student fashion department at J High

a teenager who is in a gang named Toman 

Jihyeok Woo (snapper) is the cameraman of the famous channel viral hit he used to be a bully then changed his way when he got his own medicine from hobin and now he is a great friend but is really weak he also has a crush on a girl named gaeul who does not like him 

the cameraman for his best friend hobin

a personal trainer who is kinda a bookworm he loves martial arts  but never fights he does Kyokushin karate, jiu-Jitsu, Taekwondo and some judo he is a greek when talking about them