久坂 愛奈

Class: 3rd year, 11th class
Affiliation: Otowa Gakuen Festival Executive Committee
Likes: Coffee milk, sweet things

Yuuki's classmate, neighbor and childhood friend. The two neighbors used to be really good friends, however, certain "recent incidents" forced their relationship to be estranged in middle school. She has an older sister-like personality, kind and warm, but there's no stopping her when she gets angry. Because her compability with Yuuki is good, she becomes his loving partner. Unknown to her, Aina is pretty popular with the boys.