Nao Serizawa/Relationships

Relationships
Natsuya Kirishima:

These two are shown to be very close, often helping each other study. They are also shown to regard each other as equals in their captainship of the swim club. It is shown that Natsuya trusts Nao very much, enough to entrust him with the responsibility of guiding Makoto Tachibana, Haruka Nanase, Ikuya Kirishima and Asahi Shiina.