|Anime Debut||Episode 1|
|Japanese voice||Yui Horie|
|English voice||Kate Higgins|
Aina is a very beautiful girl with light brown medium length hair tied up into pigtails. Her eyes are shown to be in a reddish-brown shade, but depending on the lighting, it can also be shown as either a very deep yellow, or gold. She wears the designated uniform for the girls but oddly enough, her skirt is much shorter, which is why the majority of both of her thighs are revealed. This isn't a problem for the other girls, so it is possible that her skirt was just made shorter by the school. She also wears tight white stockings on her legs and white indoor shoes to match.
Early on, Aina is a manipulative and shallow girl who uses her cute looks to charm the boys into doing her bidding. As a result, she is generally disliked by most of the girls in school. After failing to seduce Sakamoto, however, she becomes humbled and manages to befriend a few girls. Though she retains her haughty and pompous attitude, she has softened up a bit and is implied to have genuine feelings for Sakamoto.
A female student in Sakamoto's class who falls for him. She is very popular with men but has no interest for anyone else, which makes her disliked by the girls. She charms others to do her bidding by making them fall in love with her through 'love lessons'.