At first glance, he appears somewhat slower than other students with his vacant expression and slurred speech, but in reality, he is highly intelligent and cunning. He exhibits typical psychopathic traits, shamelessly faking tears or begging for forgiveness whenever it serves his needs. He views everyone around him as mere disposable tools; a cold-blooded individual who will exploit the kindness of others without hesitation. 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.