Remember that Harley Quinn is both
Bisexual and Jewish
CAN SOMEONE FIND WHERE IT'S STATED SHE IS JEWISH?! I NEED THAT!
And a personally fav
Fun fact: Harley was originally a one-off character/pseudo-walk on role that Paul Dini made for his friend Arleen Sorkin (Harley's original VA). Harley is loosely based on Arleen, including her being Jewish. So this isn't something that was added later by another writer, but rather an aspect of her that was part of her character since day one.
Not that it would make her any less Jewish if it was added later, of course, but I think it's important to know how it was always part of her character, especially since a lot of folks don't seem to realize she's Jewish at all, let alone that she was from inception.