LetalisK said:
I have a question that kinda references Batman. He's kinda known for not killing any of his enemies, but isn't that true of most heroes? I know there are the villains that can't be killed, but what heroes have no problem killing their enemies?
Punisher notwithstanding...
Not many, really, though with Batman, it's shown to be a very strict moral code.
He'll go so far as to endangering or sacrificing himself rather than killing someone.
It's been explained already, but that's central to Batman's character and what separates him from the villains he faces.
The same can be said for really any superhero who abides by a similar morality but Batman's is possibly the most well known and recognised.
Now, as for other heroes who have no issue killing another, I can't really think of any except for certain members of the X-Men. And I think Wonder Woman killed a few people but I never read her comics much.
If anyone ever did, they're usually presented one of two ways, that I've seen. The first being that they fall closer to the antihero spectrum (see virtually every character from Watchmen, the newest Robin, the main protagonists of the Sin City books or Catwoman). And the second where it's presented as horribly traumatic for the hero in question.
Spider Man, for instance is rarely shown to kill someone but the few times I remember he did, a central plot point surrounding it is that he's left traumatised over the murder or, at the very least, regrets killing them.
Just my take.