Board Thread:General Discussion/@comment-1962215-20140317132636/@comment-5679696-20151216175252

True, but the show never regarded it as a mental illness. They treat Zelena as a mentally ill character, when she is a perfectly healthy cruel person. Cruella, on the other hand, who looks more like a mental case, is treated as someone who just happens to splash in darkness.

EDIT: Wait, did someone call her a psychopath on-screen? I can't remember wether it happened on screen or here xD