She has long dark purple hair she keeps in two braids behind her, grey eyes and large wire-rimmed round glasses. Hidden by her long skirt are tally marks carved onto her upper thighs—a count of how many men Genocide Jack has killed. On the left side of her chin is a small mole. Toko is intellectually gifted, yet she has problems in social behavior. It's been stated that she either never learned or never bothered to learn social skills. She is friends with Komaru Naegi.