|Age||14-15 (High☆Speed! Vol. 2)|
|Affiliation|| Iwatobi Junior High School (former)|
Iwatobi Swimming Club (former)
|Anime||High☆Speed! -Free! Starting Days-|
|Light Novel||Volume 2|
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.
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.
- Main article: Nao Serizawa/Relationships
|Haruka Nanase • Makoto Tachibana • Nagisa Hazuki • Rei Ryugazaki • Gou Matsuoka • Miho Amakata|
|Chigusa Hanamura • Tadanori Sera • Male Teacher|
|Rin Matsuoka • Sosuke Yamazaki • Aiichiro Nitori • Momotarou 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|