Haruto: The ghost of Class 3-4 and the central figure (Ghost). Doyoung: The class president and ranked 2nd in the school; he leads the operation to find the mysterious individual in the class. Choi Hyun-suk: A character who leads the search operation with his extensive knowledge of ghosts. Asahi: A student who amplifies suspicion with his eerie behavior and habit of drawing creepy pictures. So Jung-hwan: An aspiring creator obsessed with YouTube views who films around the classroom and school. Yoon Jae-hyuk: A model student who is ranked 1st in the school. Yoshi (Yoshinori): A student with the unique trait of reading his friends' futures with tarot cards (User). Park Jeong-woo: A student who looks brave but is actually very fearful. Kim Jun-kyu: A student who gets along well with all his classmates. Park Ji-hoon: A member of Class 3-4 who hangs out and jokes around with friends. Mashiho: A bright and friendly student who gets along well with his peers. Bang Ye-dam: A member who joins the investigation amidst the mysterious events.