A hot chick with hair a strange color, a complicated past and an even more complicated future.
Wait, that is Terra! That's why I love that game sooo much!
Actually, I think I would make a young and insicure girl who holds a magical sword (possibly with the spirit of someone who acts as a guide in it). She would have blue hair (or else curly flame red hair), would be named Glynia and have the use of some dark powers who make her feel troubled. And yes, of course, she'd have an affair with some cool character guy

Noone of us would like to be a useless character, would we?