|Also known as||Nao-senpai|
|Age|| 14-15 (High☆Speed! Vol. 2)
|Affiliation|| Iwatobi Junior High School (former)|
Iwatobi Swimming Club (former)
Soufukan High School (former)
|Anime||High☆Speed！－Free! Starting Days－|
|Light Novel||Volume 2|
Nao Serizawa (芹沢 尚 Serizawa Nao) is a third year junior high student who debuted in the second volume of the light novel High☆Speed! written by Kōji Ōji. He is a minor character in High☆Speed！－Free! Starting Days－, Free! -Take Your Marks- and Free!-Dive to the Future-. He was a manager of the Iwatobi Junior High swimming club. He's currently studying Sports Medicine in college.
He has long grey hair with bangs, yellowish-green eyes and is relatively tall and is usually shown with a kind smile on his face. Since graduating Junior High he wears glasses and his hair is shorter.
Nao is somewhat like Makoto, inferring to their kind nature and such. For one thing, they even share the same eyes(more droopy and kind-looking). Being somewhat like a mother to them, he has a gentle and soothing personality. Nao is also extremely empathetic, prior-known to understand what Asahi is going through when Asahi says to Nao that what Natsuya said about their relay. He also is a good listener, letting the person he's talking to spill out to him.
- Main article: Nao Serizawa/Plot
He was the one who coached Haru, Makoto, Ikuya and Asahi when they were first years in middle school.
In High☆Speed！－Free! Starting Days－, he is shown to have gone through an eye surgery. In Free! -Take Your Marks-, Natsuya says it's due to an eye injury. He also says that he wishes he could swim with Nao again someday, but he can't since Nao isn't allowed to swim.
- Main article: Nao Serizawa/Relationships
- In Free!-Take Your Marks-, it was revealed that he is now studying Sports Medicine in university.
- He was also a Library President Committe as revealed in the light novel.
- Before getting into swimming, he was into Aikido (one of the kinds of martial arts).
- He is the coach of Misaki Kuramoto in Free!-Take Your Marks-.
- His motif animal is a northern gannett.
|Haruka Nanase • Makoto Tachibana • Nagisa Hazuki • Rei Ryugazaki • Gou Matsuoka • Miho Amakata|
|Chigusa Hanamura • Tadanori Sera • Male Teacher|
|Rin Matsuoka • Sosuke Yamazaki • Aiichiro Nitori • Momotaro Mikoshiba • Seijuro Mikoshiba • Shouta Nakagawa • Takuya Uozumi • Kazuteru Minami • Toru Iwashimizu|
|Goro Sasabe • Mr Tachibana • Mrs Tachibana • Ren Tachibana • Ran Tachibana • Mrs Tamura • Nanako Hazuki • Hayato Shigino|
|Kisumi Shigino • Aki Yazaki • Asahi Shiina • Ikuya Kirishima • Nao Serizawa • Natsuya Kirishima • Nii Satomi • Shota Yazaki • Tomo Yuzuki • Sakuyuki Narukawa • Riku • Kakeri • Kazu • Wataru|