Harley I always thought was a fun but somewhat sympathtic villian. Though her origin has been a little enigmatic until now.
We see who she was before (she really does look better without the hat and makeup) as just a regular person like anyone else but how she slowly but surely fell into the Joker's spell which is both a facinating but also disturbing transformation as we see from her note taking in the latter sessions it starts to lose reason.
In a way I can't help but feel that what Harley is going though is what is called Stockholm Syndrome. It's a psychological condition where the victim falls in love with their captor. This makes her character somewhat tragic because she thinks she's in love but she might not really be, it could be more the idea of loving another. We got to see that Harley really can do well without the Joker may'be ever smarter than him, and not just came up with a logical plan on killing Batman (which was simply shooting him) but was able to execute the Joker's plan well. And my heart slightly sank when we see once again "The Joker" being abusive toward Harley for no good reason, he just pushes her out the window almost killing her, that made me mad and hope Batman beat the tar out of the Joker and of course Batman does.
The end sort of gives me a sad and grim feeling inside just as Harley was coming back to her senses she sees the same flower Joker gave her the first time he saw her, it just showed Harley soul is forever lost.
