2- Mia. Sweet innocent Mia. I feel like all the "Mia" named characters in games are good.
Just for me, Mia has the greatest potential of any girl in the roster. The reason is very simple: She has the potential to have two distinct personality types with the choices you make.
If you decide to keep her family together, she could be wholesome.
If you decide to break her family apart, that can affect her and take her down a dark path.
You see hints that she is tied up by her mom and other things. I truly wish her "dark side" could be explored and she be given a new type of personality based on the decisions made. Maybe she doesn't go out with you for a while but comes back for the D after finding herself. Maybe there's a 3-some with the mom at the end of the Helen route.
I don't know. But her path of sexual exploration could have her finding a certain guru that makes this far more likely if this were a separate path for her. But I don't think it'll really be shown. I just think it would have made her far more intriguing than what's there now.