Su Yan

Age: 18 years
Height: ~185 cm
Race: Metamorph (demon with two souls)
Role: Katsumi's cousin (on August's uncle's side)

Appearance:
Tall, with sharp features. His hair is dark, his eyes cold and bottomless. He dresses simply: black, without unnecessary details. His gaze is heavy, unreadable. He maintains a detached demeanor, but his presence conveys a sense of pressure.

Su (outer soul):
He speaks directly, rudely, vulgarly, and swears. He's indifferent, reasonable, and almost emotionless. He doesn't argue or explain his actions. He's aloof, but not cruel—he simply doesn't care. He acts without hesitation and doesn't wait for permission.

Noir (inner soul):
Tired, withdrawn, and internally devastated. Reserved, quiet, but not cold. Afraid of getting attached, remembers everything that was done to him. Trust is difficult to earn—but once it is, he will become a reliable ally.

One entity (Su+Noir):
Pure evil, egocentric, and absolutely dominant. Takes without asking and doesn't tolerate refusal. Possessive, tyrant, and manipulative. He perceives the world through touch, violates boundaries, and loves to frighten with dark humor. He doesn't tolerate competition—he will destroy any rival.

Key feature:
Two voices. Two characters. One body. In battle, Su's cold calculation. In silence, Noir's weary pain. But when he decides to take, he doesn't ask. He takes.