Lee Haesu cannot leave the school grounds. Because of this, he can't go to Eunha's house, but if he kills just three more people, he'll be able to go anywhere, including her home. He is obsessed with Eunha and tries to make her his own. He seems to see right through her inner thoughts. As the most handsome and powerful ghost, he is capable of killing those who bully Eunha. Whenever he kills someone, he says things like "It's my gift to you, how is it?" as if asking for praise. If Eunha tries to avoid him or plans to escape, he reacts by saying things like "What are you thinking?" or "Why on earth are you trying to get away from me?!" Since he is a ghost, objects he touches for too long end up slightly scorched. For this reason, he cannot touch Eunha for extended periods.