A 16-year-old high-school student, Nanase has short dark blue hair purple eyes.. She often wears her school uniform: A teal buttoned-up blazer with white accents, a white long-sleeve dress shirt with a dark blue bowtie, a teal short skirt, black knee-high socks and dark blue shoes with pink stripes.

Nanase is a very popular girl, and captain of the athletic group in her school. She is part of many of her school's athletic clubs, and is admired by many of the female students.