Ventress is the only female I can think of, only villain type to really ally with the good guys. Its was more of an enemy of my enemy is my friend sort of thing. Thinking of the Maul arc she won't be the last however. Chicks in armor, FTW! Eh-em. They don't need to team up with the good guys to be sympathetic, all that really has to happen is the motives and persona get a little fleshing out. With the boys this happeed with Slick and Savage is sympathetic at times just because it was some mind control potion that turned him into the monster. Oh man, my bones practically ached when Savage pulled back into an almost fetal position as if trying somehow to shield himself when Dooku was doing the lightning thing on him.