Naru is a high school student living at Hinata-sou who is prepping for entrance exams to Tokyo University at a cram school. While nice and caring to the girls living at the Hinata-sou , Naru is very short-tempered and prone to violent outbursts towards Keitaro Urashima in response to any of his accidents that put her in a state of undress or if he walks in on her changing or bathing. Naru finds herself becoming more attracted to Keitaro as the series progresses, but denies having any interest in the guy whenever her feelings for the guy are questioned. She also has a crush on Seta Noriyasu, the man who motivated Naru to study hard enough to try making it to Tokyo University. While an attractive girl, Naru is terribly near-sighted and wears glasses whenever she is studying or attending classes.