1. She is a badass
2. She can rock the face tattoos which are hard to pull off
3. She's crazy, and that's why we love her
4. She actually shows emotion
5. She says things that we can all relate too
6. We can all relate to her
Her upbringing was because her crazy boyfriend changed her from Harleen Quinzel into Harley Quinn, which teaches us a lesson that even those who we love change change us for better or for worse.
7. She's beautiful
8. All in all...
Harley Quinn is actually the best.