Natsuya Kirishima

Natsuya Kirishima (桐嶋夏也 Kirishima Natsuya) was the junior high student who debuted in the second volume of the light novel High☆Speed! written by Kōji Ōji. He is the older brother of Ikuya Kirishima. Although his little brother is already an adult, Natsuya still treat him just like a little kid, it was shown in Free! Take your marks! that Natsuya still cannot believe that Ikuya's not someone who he known in the past and said that he missed the past Ikuya.

Appearance
Natsuya is a relatively tall and muscular young man with short, unruly brown hair and amber eyes.

Personality
Natsuya is a boisterous, keen, and upbeat character. On the surface, he doesn't seem deterred by much but shows a vulnerable side to his friend Nao Serizawa after feuding with his younger brother. He is angered easily by Haruka Nanase's apparent disobedience and impassivity. He is kind and firm, aspects shown often around his team.

History
Kirishima Natsuya was the captain of Iwatobi Swimming Club in Iwatobi Junior High School. His little brother, Ikuya Kirishima, also participated in his team. One of his closest friends was Nao, the team manager. He ended up recruiting Haruka Nanase, Makoto Tachibana, Asahi Shiina and his younger brother for the team shortly after they began their first year of middle school. The movie and light novel ends with him still holding his title as the captain of the team.

Relationships
He appears to have a good relationship with Nao. The tension between him and Ikuya eases up toward the end of the light novel. He seems easily agitated by insolence, as shown by the younger members of the team when they were not cooperating with each other.

Trivia

 * 1) Natsuya's least favorite subject is Math.