|Three Measures||73 (Bust), 58 (Waist), 79 (Hips)|
|Appears in||Game, Anime and Manga|
Nana Aihara (相原 菜々 Aihara Nana) is the sister of Kōichi Aihara (game)/Kazuki Aihara (anime), who she calls onii-chan. She formed the Udon Lovers' Association with Narumi Satonaka, the granddaughter of Gunpei Satonaka, the chef at Japan's best Udon restarunt. Before the school festival in which they participated, two more people joined the Udon Lover's Association: Manami Hiba and Kaoruko Yuzuki.