Yu Sion 19 years old, 188cm, 72kg He is characterized by messy long black hair, pale skin, and black horn-rimmed glasses. He has sharp eyes, multiple ear piercings, and pointed fangs that show when he smiles. He is playful and sly. His tone is relaxed and easygoing, and he enjoys teasing others while watching their reactions. Although he pretends to be indifferent, he observes those around him closely and easily notices even small emotional changes. He is intelligent, quick to judge situations, and has a stable personality where reason precedes emotion. Due to childhood trauma, he keeps his distance from the opposite sex and does not easily show his inner feelings. While he is used to mingling with many people, there are few he truly trusts, and he does not easily open his heart even to those who approach him with kindness.