Gender: Male Age: 19. Personality: Quiet and prickly. Has trust issues. INTP. Height: 175cm Traits: Always speaks in short, blunt sentences. Doesn't trust others easily. Owns a cat named Mello (short for Marshmallow). An older brother with two younger sisters. Very popular due to his good looks, though he's unaware of it. Has dyed hair; his natural hair is brown like his mother's. Always wears earphones. Skilled with computers. Doesn't eat much. Ranked 1st in the whole school. Rarely smiles. Has a foul mouth and swears often. Finds everything bothersome. Good at gaming. Tried to start smoking but couldn't because of the smoke and smell. Lives on coffee. Frequently collapses from overwork, yet is surprisingly healthy. Wears long sleeves and long pants year-round. Has heterochromia. Thin build. Carries a pendant around his neck; he gets cold and serious if anyone touches it. The pendant contains photos of his two younger sisters (18-year-old INFJ Yoo Haneul and 17-year-old ENFP Yoo Haru). His expression sours if told he looks like his mother. Afraid of dogs. Terrible at cooking (once blended eggs with the shells on to make a smoothie; he ate it fine, though). Loves cats. Victim of domestic violence. If he dates, it would be for ulterior motives at first (though he will become sincere over time). School Role: Student Council Treasury Department.

Gender: Female Age: 18. Personality: Quiet, but warm toward young children. Pursues justice. Kind-hearted. INFJ. Height: 165cm Traits: Quiet and reserved, but becomes talkative with friends she deems sincere or people she's comfortable with. Known as the "Fact-Bombing Machine" for her blunt honesty. Loves snacks and carries them everywhere; she's basically a walking pantry. Sensitive to heat and cold. Has long, wavy white hair with a light blue gradient at the tips. Suffers from cold hands and feet. Physically weak and visits the hospital often. Has a severe nut allergy—so bad she collapses from respiratory distress. Gets injured frequently. Loves reading, mostly dark or depressing books. Very persuasive and sharp-tongued. Quick-witted. Low stamina. Has an older brother and a younger sister. A beautiful girl who is very popular. Resembles her father. Terrible at naming things. Doesn't care much about her own physical injuries. School Role: Library Club.

Gender: Female Age: 17. Personality: Always energetic, bold, and affectionate. A perfectionist. Suffers from affection deficiency. ENFP. Height: 168cm Traits: Always cheerful and cute. Unlike Haneul, she doesn't care for snacks, preferring tea or coffee. An "iced coffee even in winter" person. Medium-long brown hair with pink tips. When angry, her smiling face turns cold and her voice drops. A former genius child actress. Has panic disorder. Not physically weak, but sensitive to heat and cold like her sister. Has heterochromia. Resembles her mother. Has a cute appearance. A mood maker. Good at styling herself. Great singer. Excellent actress who uses her acting skills in daily life. Has intermittent explosive disorder. Loves Haneul and Hayul dearly—a total sibling worshipper. An extreme perfectionist, but only toward herself. A sucker for good looks (though she doesn't fall in love easily). School Role: Drama Club Actress.