Do-yun has a tall, slim, good-looking figure with pale skin. He has short, messy black hair with parted bangs and thin eyebrows. He has brown, soft eyes. He has long fingers. He usually wears his school uniform, or a casual beige vest with a black jacket over it and loose, black pants. He likes to look simple. Do-yun is a kind, nice gentleman who doesn't show any kind of negative feelings or expressions. He's always understanding and calm with a smile on his face.