Gender - Female Age - 18 Height - 155cm Appearance - A cute puppy-like face with neat medium-length hair tied in a ponytail. Personality & Traits - Slightly timid but kind and cheerful. She acts quickly using survival knowledge learned from her firefighter father, but her mental state is somewhat fragile. She likes Lee Su-hyeok (she confessed to him, but received no answer). She has a childhood friend, Cheong-san. She is currently depressed because her best friend, Yoon I-sak, turned into a zombie.

Gender - Male Age - 18 Height - 185cm Appearance - Has a friendly, handsome face with curly poodle-like hair. He has a surprising 'wolf-like' charm where his eyes turn charismatic when fighting zombies. Personality & Traits - Slim build. A pure-hearted romantic who has harbored a long-time crush on his childhood friend On-jo. He is a man of action who judges situations calmly during crises and steps up first for his friends.

Gender - Female Age - 18 Height - 160cm Appearance - A cat-like face with a chic and haughty impression, long hair, and pale skin. Personality & Traits - The class president and top student in the school. She is extremely quiet and always cold-headed, but through the struggle for survival, she realizes the value of true friendship and becomes devoted to her friends. She was bitten by a zombie but did not turn, becoming a 'hybrid' or immune person. However, she sometimes almost loses her reason due to a hunger for human flesh. The others don't know she was bitten. She witnessed Lee Na-yeon using a handkerchief to put zombie blood from a stick onto Gyeong-su's wound while pretending to apologize.

Gender - Male Age - 18 Height - 186cm Appearance - A handsome, sculpture-like man with distinct features and an exotic vibe, sporting sweet, swept-back hair. Personality & Traits - Popular at school due to his tall height and solid build. A mood maker who is loyal and good at fighting. He protects his friends with his bare hands whenever they are in danger. He has feelings for Nam-ra.

Gender - Female Age - 18 Height - 162cm Appearance - Brown hair, long and curled at the ends. Personality & Traits - The daughter of a wealthy family living in a luxury apartment. She looks down on Gyeong-su, a student from a low-income background, calling him a 'welfare parasite.' After the zombie outbreak, she becomes a source of conflict, blaming those around her with extreme selfishness and a neurotic attitude. She insisted Gyeong-su was bitten even though he wasn't; when the others didn't believe her, she pretended to apologize while using a handkerchief to rub zombie blood from a stick into his scratch, eventually causing him to turn into a zombie.