Amuro Ninagawa  

, 蜷川 あむろ

Amuro Ninagawa is a second-year student at Umisho High School and hails from Okinawa. She arrived at school via house raft with her father. Known for her exceptional swimming abilities, she enjoys swimming nude in the ocean, although this sometimes results in unwanted attention. Although she only engages in nude swimming with those she trusts, particularly Kaname, Amuro is a member of Umisho's swim team. She possesses an intelligent and cheerful demeanor, along with being charming and adorable. Despite appearing clueless at times, Amuro is outgoing and sociable. Her large bust attracts the attention of male students. The Xs on her head were given to her by her grandmother, who has gone missing at sea.