I'm considering making my main character an antihero (or antiheroine in her case). When the concept of this character was conceived, she was meant to be a villain but over the few months that I've known her...she's evolved a bit and perhaps more of an antihero. She's sort of antisocial and very independent...she changes a bit by the end of the story, but I must ask how far is too far in terms of the acts of 'villainy' (not villainy in her eyes, but in terms of some readers' perspectives perhaps) she could commit as the story's hero (in this case, antihero)? In order for her to stay a protagonist in the story, are there things she cannot do that a traditional 'villain' wouldn't do? Thanks!