Since childhood, Yaya has been a close friend to Naru. She understands Narus timid nature well and has always watched over her. Currently in the same grade as Naru, Yaya is known for being sociable and having an attractive appearance that makes her popular among peers. As part of a band called "Need Cool Quality," she pursues her passions and takes advantage of her youth while it lasts. Being Narus best friend, Yaya supports her and encourages her to work towards finding what she wants in life.