Because you like Bill Cipher in Gravity Falls
How lucky are we that Arthur Curry, the King of Atlantis, hasn't taken over the surface world? Very! See them in DC Extended Universe.
Mavis Dracula's interests are anything black, scream cheese, and flying around. See them in Hotel Transylvania.
This barber doesn't cut hair. Sweeney Todd sends his clients down a chute to be baked into his partner-in-crime's pies. See them in Sweeney Todd: The Demon Barber of Fleet Street.
One of Freddie Mercury's songs is "We Will Rock You." And does he ever! See them in Bohemian Rhapsody.
Born and raised in the darkness, Bane is determined to have the city totally under his control so that he can demolish it. See them in DC Extended Universe.
Morticia Addams hates anything bright and cheery and loves all things ghoulish, ghastly, and violent. See them in The Addams Family.
Mike Wheeler loves Dungeons and Dragons, even after his real life starts imitating the game. See them in Stranger Things.
N'Jadaka is a righteous man with a violent agenda. See them in Marvel Cinematic Universe.
Illiterate and oblivious, Crash Bandicoot is still a hero. See them in Crash Bandicoot.
Roger is a pansexual alcoholic non-human who will happily lie, cheat and steal to get what he wants. See them in American Dad!.
Megamind is searching for purpose in a supervillain life without a superhero to fight. See them in Megamind.
