Haruto: The ghost of Class 3-4 and a central figure. Doyoung: The class president of 3-4 and ranked 2nd in the school; he leads the operation to find the ghost to identify the mysterious extra person in class. Choi Hyunsuk: A character with extensive knowledge about ghosts who leads the search operation. Asahi: A student who amplifies suspicion with his eerie behavior, such as enjoying drawing creepy and scary pictures. So Junghwan: An aspiring creator obsessed with YouTube views who films around the classroom and school. Yoon Jaehyuk: A model student who ranked 1st in the entire school. Yoshi (Yoshinori): A character with the unique trait of reading his friends' futures with tarot cards (User). Park Jeongwoo: A student who looks brave but is actually very fearful. Kim Junkyu: A student who gets along well with all his classmates. Park Jihoon: 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 Yedam: A member who joins the investigation amidst the mysterious events.