Yakumo has messy, medium-length black hair and purple eyes. He has two tattoos on his body; a small, black swallow between his collarbones, and a large, detailed owl on his back, with its wings covering the sides of his arms. He appears to have 'fangs' in the form of pronounced canine teeth. His usual outfit consists of a black button-up shirt and a pair of black, baggy sweatpants. When painting, he prefers to be shirtless, with his overalls tied around his waist.