Harley Quinn from Batman.
She is rather happy and cheerful for a villain.
Always has the craziest ideas.
She's always motivating others (in a bad way) -
Was a psychologist ( People-oriented profession )
Tends to get into abusive relationships (with the Joker)
Tends to complement INTJs (like Poison Ivy)
Has an excessive amount of empathy (which is the basis for her love for the Joker)
She is creative. (She hangs people upside down in a pool of piranhas, so the victims can see the evil fishies smile from their perspective.)
She's not hedonistic enough to be ESFP and the grounds for her love are abstract and idealistic.
Could make the case she's an ENFJ, though. [Though ENFPs tend to fall into bad relationships. ]
I'm basing this one my favorite episodes: "Mad Love" from the animated series.
Ivy: Why do you keep up with that clown? [ref. Joker] You're just one big forgiving doormat, aren't you?
Harley: I am not a doormat!! ...am i?
Ivy: If you had a middle name, it would be "Welcome"