Bio: Naru first came to Hinata House as a sickly child and it was there she first met Mutsumi Otohime and Keitaro Urashima.
Years later, she returns to the girls dorm as a student with poor grades. She is tutored by Seta and develops a crush on him. When Seta leaves, Naru makes a promise to get into Tokyo University to make him proud.
Naru decides to tutor Keitaro after he becomes the landlord of Hinata House, even though she considers him a pervert and an idiot.