Nagatoro is an attractive, petite and short statured high schooler with long, straight black hair pinned to the right side with a pair of white hair clips. She has brown skin with noticeable - though sometimes inconsistent - tan lines in the shape of her swimsuit, and large, expressive amber-maroon eyes. She has a metallic piercing on her upper right ear and both of her lobes are pierced, despite this she rarely wears earrings. Compared to other characters, she is exceptionally small, although it has been hinted that she may have a late growth spurt and she actually grew several inches during winter. Nagatoro has a lean, athletic, slender and very flexible physique with a modest bust size which she is often ashamed about despite being -considering her size and build - pretty average sized; also she seemingly gained a bra cup as the story progressed. Nagatoro is rarely seen without a sadistic, cocky, smirk that often displays her very prominent canines and has the tendency to widen the pupil of just an eye whenever she grins.