One of the students from Shioshishio. An indecisive middle schooler who is prone to crying and is clumsy. It is implied that she has feelings for Tsumugu but is still not sure since the sea people and land people are prohibited from being in relationships. She is initially highly dependent upon the rest of the group, particularly upon Hikari and Chisaki, but now starts to become more independent and mature. She is known as the center of the group.