Umi Kouzaki

The protagonist's junior at the university. She talks in a stern, but polite way, and she gives off an aura which makes her difficult to approach. Thus she doesn't really have friends. She doesn't particularly like talking to other people either, but finds the protagonist to be easy to talk with since he's cut from the same cloth. She is usually calm and determined, but tends to jump into wrong conclusions. Sometimes she can become childishly stubborn. When other girls get close to the protagonist, she acts jealously as girls of her age usually do.