Komaru is a teenager around high school age, who is described in the Danganronpa 1.2 Reload Artbook to be a year younger than her brother Makoto. However, when scanned by Monokuma during Ultra Despair Girls, it states her to be fifteen to seventeen. She has short, dark brown hair with a tint of green, and de-saturated green eyes. She also sports an ahoge, similar to that of her brother's, which developed as she grew. Overall, she is described as very plain-looking and "normal".