Because you like Voldemort in Harry Potter Series

Thanos is an intergalactic warlord, on the hunt for infinite power. See them in Marvel Cinematic Universe.

A monstrous pirate captain, Davy Jones is quite literally heartless. See them in Pirates of the Caribbean: the Curse of the Black Pearl.

Mother Gothel is a great mother as long as you never, ever, break the rules. See them in Tangled.

Ursula will oh-so-generously grant your wishes for a price. See them in The Little Mermaid.

White Witch's heart is as frozen as the land she rules. See them in The Chronicles of Narnia.

Anger is a cantankerous hothead whose job is to get others riled up. See them in Inside Out.

Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.

The Grinch's heart is just too small to appreciate Christmas. See them in Dr. Seuss' How the Grinch Stole Christmas.

A cruel pirate, Captain Hook still fancies himself a gentleman. See them in Peter Pan.

Scar is sneaky, snarky, and always striving for more power. See them in The Lion King.

This bite-sized, power-hungry plankton is determined to uncover the secret recipe for the Krusty Krab burger. See them in SpongeBob SquarePants.

There's nothing "demi" about this demigod's massive ego. See them in Moana.