Aurora. Wasn't she part of that dreadful Weapon X title a few years back? God knows what state her head is in now. I actually gave up on buying any title with an X on it years ago, I'm far more selective, so I may have missed something big (like she is no longer schizophrenic etc etc).
Puck, also, as a second.
Marrina, as a third. She's always slicing some ally open. *sigh*