Hajun is a tall, slender male with fair skin and pink eyes. His blonde hair is kept in a neat and tidy style with a left parting. He wears a black turtleneck with a white shirt on top. He also wears a white, pink and red jacket with a blue belt tied on his waist. Hajun wears a pair of black pants with red stripe on the sides and a pair of white, red and blue sneakers. Hajun has a three-lined tattoo on the left side of his neck, and he has multiple piercings; three lobes, double helix and ETCS.