So…Harley Quinn.
Yeah she’s my favorite Batman villain. But is she really a villain? or more of an anti-hero?
It really depends much on point of view. The problem is always POV.
For Harley. She is the Main character.
For Bruce Wayne, He is.
And realistically the same is true in any story. If you pick up a book and look at it from another character’s view…that character is not going to see themselves as a secondary character. Would you? If say you were in the DC Universe and hanging around the Daily Planet…would you see yourself as a extra in the story? No! So, from your POV you are the main character.
Harley would not see herself as a villain…
She is crazy, but not entirely without a idea of right and wrong. I believe she would see herself more as an antihero or as someone with a really nasty case of bad luck.
Which opens up so many options for the character in storylines.
I think sometimes just understanding the POV helps us to understand and perhaps flesh out the characters we write better. I think it also helps us empathize better with fictional characters on a different level as well.
Pattimouse 
There are, always, many, different, perspectives that different people have, toward, one, solitary, event, and, they are all, correct, to the individuals with these, varied, views, and, the problem happens, when we became, too, stubborn in, holding onto our, individual, views, that we don’t, allow for, anybody else’s, opinions to, register.
LikeLiked by 1 person