Shizuru Isurugi

Shizuru Isurugi (石動 静流 Isurugi Shizuru) is one of the supporting characters in Free!'s third season, Free!-Dive to the Future-. He is a first-year high school student at Iwatobi High School and a new member of the Iwatobi High School Swim Club under Rei Ryugazaki's captaincy.

Appearance
Shizuru is a taller than average young man with dark brown hair, blue eyes and a somewhat dour expression at all times. During training, he wears the usual uniform of the Iwatobi swimming club.

Story
Shizuru first appears when Nagisa Hazuki wants to take photos of the new club members in order to send them to Makoto Tachibana. Later, Shizuru can be seen practicing at Iwatobi SC Returns where the Iwatobi High School Swim Club begins preparations for Nationals. He expresses great interest in the camel that appears in the promotional video for the club. He is the one who discovers the guide from Gou Matsuoka's island training camp from years ago.

Ryuji Azuma
When Ayumu Kunikida says Gou's name descriptions are too long, Shizuru mentions that "Perfect Killer Handsome Muscles" was a big hitundefined. In response to this, Ayumu asks "for who" and Shizuru replies with "my relative" implying that Ryuji Azuma, also known as PKH Azuma, is related to him.

Trivia

 * He suffers from severe motion sickness, to the point of passing out.
 * His family owns a seafood shop and the seaweed gathered by diving is why Shizuru is good at swimming.

Note
''There is currently conflicting evidence as to whether Ryuji is Shizuru's Grandfather or his Uncle. As such, the Free! wiki will currently simply list them as being relatives until the exact nature of their relationship is properly defined.''