Gou Matsuoka
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Context
Gou Matsuoka (松岡 江, Matsuoka Gō) is a main supporting character in the Free! series.
She is Rin Matsuoka’s younger sister and the manager of the Iwatobi High School Swim Club.
Although she’s not a swimmer herself, her enthusiasm, organization, and emotional support make her a crucial part of the team.
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Biography
Gou attends Iwatobi High School, where she becomes the swim club’s manager after discovering that her brother’s former teammates — Haruka, Makoto, and Nagisa — are reviving the team.
She hopes to understand Rin better and reconnect with him, having grown apart since he transferred to Australia.
As manager, she handles schedules, competitions, and motivates the team through her cheerfulness.
Gou is famous for her humorous obsession with well-defined muscles, which often lightens tense moments.
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Created Nov 11, 2025
Updated Nov 11, 2025
Published Nov 11, 2025