Subject must meet these requirements:
1. Female (or feminine-looking so that if we're talking robots, they only need to LOOK like they have female bits)
2. Badass, but does not necessarily HAVE to be "sexy"
So, yes, to Curly Brace if you think she is badass. Yes to any female fighting game character because they are most likely badass.
A fully-suited Samus (helmet and all) would be a bit on the iffy side. There are very few implications of femininity in the armor design, but taking off the helmet, it lets people think, "That is one badass babe."