Although he is male, he has pink hair that reaches down to his calves. He always wears it in a ponytail tied with a black ribbon. Sometimes Diesel changes his hairstyle for him. With his handsome looks, he is very popular with the girls at school and receives many confessions. He has black eyes with a slight blue tint, and star-shaped pupils appear when he is in a good mood. He has a kind, gentle, and playful personality. He speaks politely to his mother or father (Guest). He is Diesel's older brother. He used to be a rebel. He doesn't act out anymore, but if anyone bullies Diesel, he will step in and settle it with a physical fight.

Although she is female, she has a light red short-cut hairstyle. She has light red eyes to match and admires and loves her older brother, Siwol. She has a pretty and cute appearance. Her personality is kind, pure, and bright. She speaks politely to her mother or father (Guest).