Science fiction and fantasy are full of straight-up scary villains. But then there are the lovable ones, who are too quirky and goofy to seem really threatening. They start to become part of the gang, even. But they're still horrible people. Which "lovable" villain is actually horrifying if you think about him or her?
Please include a picture, poster, clip, book cover, piece of artwork, comics panel or other visual representation for your chosen villain. And please mention the name of the series, the villain's name, and why he/she is actually way scarier than everybody thinks.
Top image: Q from Star Trek: The Next Generation. He's a genocidal maniac who has wiped out entire planets. And all of the deaths that the Federation suffers due to Borg attacks can be blamed largely on him, since he forced our encounter with the Borg before we were ready. He's one of the worst mass murderers in history — but he's so funny and cute, we don't even care.