Natsumi is a teenage girl that has long maroon hair and red eyes. The anime portrays her with a cat-like mouth. She appears to be the shortest out of her friends as she stand slightly shorter than Akari.

Natsumi typically wears a school uniform similar to Akari's; a light blue sleeve shirt with a blue medium bow, a dark blue skirt, brown shoes, and white and blue legwarmers. Her fingernails are manicured and painted in a solid color, usually either pink or red. Long messages 