Kyou Matsuoka

Kyou Matsuoka is the mother of Toraichi Matsuoka and the grandmother of Rin Matsuoka and Gou Matsuoka. When Rin transfers shools from Sano Elementary School to Iwatobi Elementary School, he lives with this grandmother. She watches Haruka Nanase's first swim tournament in junior high school in place of Rin. She is also the last ama in Iwatobi Town.