Harumi describes herself as a "gyaru in disguise". She possesses a strong fashion sense and likes to go shopping. While cheerful on the outside and towards others, she has a tendency to hide her real feelings towards her family and friends. Like Yuzu, Harumi is a fashionable girl who keeps up with the latest trends, some of which are quite revealing on her. She has chest length plum hair styled in low twin pigtails with perfectly straight bangs that cover her forehead.