Iwatobi High School Swim Club

Members of the swim club and affiliated people:

The Iwatobi Swim Club was founded by swimmers Haruka Nanase, Makoto Tachibana, and Nagisa Hazuki with Gou Matsuoka as manager and Iwatobi High School classical literature teacher Miho Amakata as faculty advisor. Rei Ryugazaki later joined as another swimmer, because the club needed four swimmers to participate in events, such as a joint practice with the Samezuka Academy swim team.

Iwatobi High School would not fund the swim club until it had accomplished something, which prompted the club to train for competitions. After winning a relay and qualifying for a regional competition, the club was praised by the school and encouraged to aim for nationals. At the regionals, however, the team got disqualified because Rin, a member of another swim team, took a place in the relay, which was against the rules. Were they not disqualified, they would have won the first place.

The swim club, even after their amazing races during the prefectures and regionals, did not gain any new members, making the original ones feel uneasy at the thought the club might have to close after Makoto and Haruka graduate. They are seen trying to gain new members by stripping in their swimsuits during the club introduction ceremony for the first-years and winning the club-versus-club relay race held during the Iwatobi High School cultural festival. Despite all their efforts, the club is still low on members. Nagisa once told Rei that they should strip naked and parade around the school, which Rei declined, asking "Where did the swimsuits go?!". After that, Nagisa told him they could make a club song, but when he heard that he would have to write it and sing it all by himself, Rei rejected the idea once again. In the end credits, Rei and Nagisa are shown as third years performing a recruitment skit during the first-year assembly. Later at least four students join them at the pool.

In Free!-Take Your Marks- and Free!-Dive to the Future-, it has been revealed that Rei Ryugazaki has been assigned as the new captain of the club, with Nagisa as the new vice-captain, and new member Ayumu Kunikida as the new manager of the swim club, along with Gou. The swim club also managed to recruit two first-year students, Shizuru Isurugi and Romio Hayahune.

The club's mascot is Iwatobi-chan (岩 (iwa) = rock, 鳶 (tonbi) = kite), a bird with a head inside of a rock.