Baek debuts in the second game and his anime appearance in Tekken: The Motion Picture as he had shoulder length black hair tied in a low ponytail. In his in-game appearance in Tekken 2 until Tekken Tag Tournament, he is depicted to have brown hair. In Tekken 5 and onwards, his hair is now gray due to aging. As a child, he has short brown hair and wears a light blue short sleeve shirt, blue pants and black sneakers. In his ending in Tekken Tag Tournament 2, he is depicted to wear shorts instead of pants.