Jiyu Kim

A competitive swimmer since middle school with long, blonde hair and blue eyes. She becomes the object of Sugu's fascination after he meets her in her swimsuit one day. Her personality is cold and unfriendly at first and it is hard for her to get along with the rest of the members of the Girl's Water Polo team.

It is eventually revealed that she had an injury during middle school and can't swim as well as she used to. After being dumped by her boyfriend, she opens up to Sugu about not being able to meet everyone's expectations and confesses that the injury has actually healed but she doesn't have the confidence anymore.