Nao Serizawa

Nao Serizawa (芹沢 尚 Serizawa Nao) was the third year junior high student who debuted in the second volume of the light novel High☆Speed! written by Kōji Ōji. He was a manager of the swimming club.

Appearance
He has long grey hair with bangs, yellow-ish-green eyes and is relatively tall.

History
Nao Serizawa was a third year at Iwatobi Junior High School while Makoto and Haruka were freshmen. He was a manager of the swimming club and was responsible for giving guidance to the first years.

Plot
He was the one who coached Haru, Makoto, Ikuya and Asahi when they were first years in middle school.