Nao is one of Hino's two bestfriends, the other being Mio. She is more of a boyish character than that of Mio, who's totally opposite. She's in the same class as Hino and oftens hangs around her. She is very close to Mio even though they have conflicting personalities.
While Hino is currently preparing for her performance for the second selection, Hino somehow pushes Nao and Mio away due to pressure and they have a very awkward situation. When going to school, Mio comes with Nao instead of Hino. Later, they reconcile when Hino is being bullied because of her participation in the concours, her being a gen-ed student, and Nao and Mio stands up for her.