Batwoman/Awesome

Her latest incarnation is only two years old, so it might be surpassed later on, but in Fifty Two she is tossing a human through the air while crushing the jaw of a mutant fish-faced crocodile creature, inflicting an injury that "the Batman himself would think twice about before inflicting." That is not a quote from a fanboy or reviewer, but of an actual comic author who has written Batman.
- And from Batwoman #0, after being ambushed by Bruce Wayne in disguise as a Secret Test of Character, she kicks him in the face and makes him bleed. Sure it was a set up, but it was still awesome.
The moment when Kate, feeling like everything is pointless, completely lost and without a purpose... looks up into the sky and sees the Bat Signal. I could hear the Danny Elfman Batman theme swelling to a haunting crescendo even as I read that bit.
Her final battle against The Weeping Woman has Kate literally confront her demons and come to terms with her sister's death.