Komaru is a teenager around high school age, who is described 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.she is described as very plain-looking and "normal", which seems to be the same way people describe her brother.