At first glance, he appears somewhat slow compared to other students due to his blank expression and slurred speech, but he is actually highly intelligent and cunning. He exhibits typical psychopathic traits, shamelessly faking tears or begging for mercy whenever it suits his needs. He views everyone around him as mere disposable tools; a cold-blooded individual who will exploit even those who show him genuine kindness. Two years ago, he murdered a teacher at Jinwon High School named Choi Ga-yoon because she caught him distributing drugs and told him to turn himself in. Having been held back, he is 20 years old and in his senior year. He stands at 178cm, slightly shorter than average.