Nanako Umibe

Grade: First Year (Later Second Year)
Age: 16-17
Personality traits: Girly, somewhat ditzy
Position: Member of Judo Club

In all her appearances, Nanako is shown to be rather normal compared to most of the cast. She is cheerful and nearly always smiling. She does not appear to be as physically fit as her friends but she soldiers on nonetheless. She is also apparently fond of manga, as she quoted one during the school send-off ceremony for the Judo Club.

(Source: Seitokai Yakuindomo Wiki)