I don't hate that there are girls in KH, I just hate that all of them suck. Kairi was a whiny, one-dimensional twat, and I never was fond of Namine's soft-spoken innocence. Nomura sucks at creating dynamic female characters, and that's the only reason I have a problem with this new potential mary-sue. If they pull it off, I'm cool with it. But the idea that she's going to suck as bad as the rest of them is what bothers me. I'm not foaming at the mouth that O GOD SOMEONE STEPPING IN ON ROXAS OR AXEL, THEY R FOR EACH OTHER ONLYY!!1, I'm just worried about her potential fail and the fact that it's still likely that one or the other ends up harboring some feelings for her (and like you said, nobodies supposedly can't feel, WHAT). Nomura's always been better at creating better female side characters than main characters. And they DO usually stick some romantic aspect in as an additional fan pleaser. I won't hold my breath, but it still looks possible.

For some reason though, it struck me as in the trailer it's possible that she could've betrayed them in some way?? Given Axel's response anyways. Also weirded out by the fact that she looks EXACTLY LIKE KAIRI (plus she has a keyblade, as did Kairi in KH2. Which is also kind of gay, because the keyblades seemed like they were supposed to be more selective), so... what does that make Namine?

DURRR. I'll reserve judgment until I actually play the thing, but knowing Nomura's suck female characters I'm not keeping my hopes up very high.