Gou Matsuoka

Gou Matsuoka is a fictional character from the anime series Free! She is the younger brother of swimmer Rin Matsuoka and later becomes the manager for Iwatobi High's swimming club. Seeing how Rin's competitive side has soured his relationships with his friends from Iwatobi, Gou works tirelessly with Haruka Nanase and the others to help restore Rin's old personality.