Nanako is a mature and kind person for a girl her age though has moments of childish innocence. She is quite responsible and reliable, and has handled a lot of housework, such as cooking and laundry in her home ever since her mother passed away. She loves Junes, in both its slogan and in visiting their Inaba branch with her family and friends. She tends to be shy around strangers, but adores spending quality time with her father and cousin whenever possible. As she develops more trust in her older cousin, she begins calling him "Big Brother" as if he really was her older brother.