Melissa is best girl. Way more chemistry between her and Midoriya than with Ochaco. They balance each other well and are each others counterpart, making the other the best they can be. Also she represents what Midoriya may have become if not for all might, she really is his other half. Ochaco would be better with someone like Bakugo who would get her out of her shell, and like wise she would temper him. I would really like to see those interactions.