Umi is a second year high school student. She was brought up in the household of a dance school headmaster, which has helped her to become a graceful girl with a refined air. She has practiced archery since childhood and has flawless etiquette. She is the type of girl who is hard on those around her, but is especially hard on herself. She does not like doing anything remotely criminal, and abhors laziness. Honoka and Kotori are her childhood friends.