Asa Mitaka is a high school girl of average height and build. She has brown eyes and black hair that reaches the back of her neck worn in two low twin tails. Asa wears her school’s uniform, which consists of a long-sleeved button-up shirt worn beneath a pinafore-style dress with a pleated skirt that reaches below the knees, a bow at the collar, a wide belt at the waist, and black, high-knee socks worn beneath Sneakers. When Yoru takes over Asa’s body, two scars appear on her face.