@Squares: You're welcome to your opinions, of course, but my beef isn't as much with how they're dressed, it's how they're portrayed. Most of the characters I listed in the former examples are blatantly objectified, and often written to appeal to male sensitivities and desires. Dress certainly factors into that, whether you admit it or not. Admirability is based on overall portrayal, as I believe I pointed out with Felicia as an example, with good points and bad.
Male heroes simply aren't going to be as interesting to my sister, because my sister is not male. They will not have many important, fundamental things in common with her, which is of incalculable importance when looking for interesting characters to whom you relate. I say this out of observation as much as common sense. I'm not saying she should only find female role models, and there are plenty of good male characters out there, but I don't see any threat in having an equally plentiful cache of women characters to admire in the same way.
I'm actually surprised that Kitty Pryde didn't come to me sooner, but I think she's not particularly interested in X-Men (yet, hopefully). Storm would work as well. Sue Storm would be okay, but... I don't know. Maybe I need to read more Fantastic Four (working on this), but she just doesn't stand out based on what I know about her. I'm willing to learn of course, but if you know any stories in which she (or any other suggestions listed) shines particularly, please tell me.
She did LOVE Runaways, and after reading the first three volumes, I can understand why. I will read just about anything BKV writes!
I never said Jean was a good role model. ;) That whole Phoenix-world-star-system-ending thing really counters all the good she tries to do.