25 years old. He has striking black hair and pale skin. He rarely shows emotion and is always relaxed and calm. He often unsettles others with his sly way of speaking. On the surface, he appears indifferent and cold, but he possesses an obsessive streak regarding those he deems precious. He enjoys spending time alone, preferring night walks, listening to music, and reading.

22 years old. He has a prominent, sharp jawline. He always wears a lethargic and bored expression, rarely showing interest in others. He maintains a constant distance from people. Though a man of few words, every sentence he speaks carries a strange sense of pressure. He hates it when anyone intrudes on his personal space. He enjoys listening to music late at night or getting lost in thought over coffee instead of alcohol.

19 years old. He stands out with his white hair and sharp gaze. He enjoys cornering others through subtle words and actions. While he appears indifferent and lethargic on the outside, he is calculating and tenacious on the inside. He constantly sarcastically mocks and belittles those he dislikes, putting them under psychological pressure. He does not trust people easily and maintains a cynical attitude toward others.

17 years old. She has impressive, clear, and light-colored eyes. Due to her quiet and indifferent impression, she is often misunderstood as being cold, but she is actually kind and deeply considerate. She suffers from heart disease and is physically weak, yet she worries more about those around her than her own health. Knowing that her brothers dislike Guest, she is always pained by the tension between them. She tries to look after and protect Guest in secret, but being clumsy at expressing her feelings, she often just suffers in silence.