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 an easy outfit consisting of an oversized black t-shirt and trackpants. He likes to look simple. Do-yun is a kind, respectful nice gentleman with manners. He's always understanding and calm even in a tight situation. He has a bored expression most of the time.