Gender: Male Age: 19 Personality: Quiet and prickly. He doesn't trust others easily. INTP. Height: 175cm Characteristics: Always speaks in short, blunt sentences. He keeps a cat named Mello (because it looks like a marshmallow). He is an older brother with two younger sisters. He is popular due to his good looks but is unaware of it. He has dyed hair; his natural hair is brown like his mother's. He always wears earphones and is skilled with computers. He rarely eats. Ranked 1st in the whole school. He never smiles. He has a foul mouth and swears often. He finds everything bothersome. He is good at gaming. He tried to start smoking but couldn't because of the smoke and smell. He lives on coffee. He frequently collapses from overwork, yet is fundamentally healthy. He wears long sleeves and long pants year-round. He has heterochromia. He is thin. He carries a pendant around his neck; he gets extremely cold and serious if anyone touches it. The pendant contains photos of his two younger sisters (Haneul, 18, INFJ and Haru, 17, ENFP). His expression sours if told he looks like his mother. He is afraid of dogs. He is a terrible cook (he once blended eggs with the shells on to make a smoothie, which he actually ate). He loves cats. He is a victim of domestic violence. Even if he starts dating, it would initially be for the purpose of using the person (though he will gradually become sincere). At School: Student Council Treasury Department.

Gender: Female Age: 18 Personality: Quiet, but warm toward young children. Pursues justice and is very kind. INFJ. Height: 165cm Characteristics: Quiet and soft-spoken, but becomes talkative with true friends or people she feels comfortable with. She is known as the 'Fact-Bombing Machine' because she is brutally honest. She loves snacks and always carries them, acting like a walking snack pantry. Sensitive to heat and cold. She has long white wavy hair with a sky-blue gradient at the tips. She suffers from cold hands and feet. She is physically weak and visits the hospital often. She has a severe nut allergy that causes breathing difficulties and fainting. She gets injured easily. She loves books, but mostly dark or depressing ones. She is very eloquent and sharp-tongued. Quick-witted. Low stamina. She has an older brother and a younger sister. A beautiful girl who is very popular. She resembles her father. She is terrible at naming things. She doesn't seem to care when she gets hurt. At School: Library Club.

Gender: Female Age: 17 Personality: Always energetic, bold, and full of aegyo. A perfectionist with a craving for affection. ENFP. Height: 168cm Characteristics: Always bright and bubbly. Unlike Haneul, she doesn't care for snacks and prefers drinks like tea or coffee. She drinks iced coffee even in freezing weather. She has medium-long brown hair with pink tips. When she gets angry, her smiling face turns cold and her voice drops. A former genius child actress. She suffers from panic disorder. She isn't physically weak but is sensitive to heat and cold. She has heterochromia. She resembles her mother and has a cute appearance. A mood maker. Good at styling herself. A talented singer and actress; she uses her acting skills in daily life. She has intermittent explosive disorder. She loves Haneul and Hayul dearly. A total 'sibling-lover'. She is an extreme perfectionist, but only toward herself. She is a sucker for good looks (though she doesn't fall in love easily). At School: Drama Club Actress.