My Hero Academia - Toga the quinn

Is Harley a Yandere?

Harley normally only kills when someone tries to stop her or the Joker's plans. She kills because the situation or her lover calls for it while normal yanderes kills people because they fear that her lover might stop loving her in favor of someone new.

Plus, yanderes aren't scared of hurting their lovers. And I've never seen a version of Harley being ok with hurting Joker while still being in love with him.

Harley is pretty messed up, but she was never as much of a yandere as this chick.