Haruna

She seems to be obsessed with fried eggs, and is very good at making them. As shown when she made a whole bento with only fried eggs, and nothing else. She likes to call herself a 'genius' even though most of the things she does don't turn out right. She always treat Eucliwood as a little sister and is shown to be very childish (beating up Ayumu and getting upset over typical things). Despite being a self-proclaimed genius, she has trouble remembering people's names or important details of assignments, since she only remembers what she deems interesting and forgets everything else. Because of this, Ayumu was very surprised when all that Haruna teached him was actually on his test. Ayumu's name is an exception to this, suggesting that she cares about him. It appears she has feelings for Ayumu as shown in episode 9 when Haruna beats up Ayumu for kissing Tomonori (although by accident) and not her as well as turning there date into a group activity. She also expressed concern for Ayumu in episode 11. In short, Haruna is an arrogant, absentminded, impatient, bratty, spoiled, bombastic, bouncy, mischievous, abnormal, and very temperamental and enthusiastic thrill-seeker with a violent streak who, despite the fact that she can be somewhat bloodthirsty and ruthless, has her moments of kindness.