Minahara Himari♀

Her mother is good friends with the protagonist's, and this led to them playing together often when they were younger. Due to various reasons, mainly the protagonist moving, their relationship became estranged, but now, several years later, they find each other at the same high school, and in the same class this year.

Personality-wise, she has a big heart, and can put a smile on your face just by being around you, but truthfully she can be quite stubborn if you get to know her. Himari is never one to go to others when she has a problem, be it guy or girl, but if she sees someone in need of help, she will always be the first one there. Contrary to her cutesy, child-like appearance, she is rather strong-willed.

Both she and the protagonist have matured a great deal since their time playing together as kids, so she can't quite figure out what to say to him now, or how to act around him. Also make sure you never tell a bad joke around her, because she'll make you know that it was bad, often entirely unintentionally.

[From NekoNyan]