Because you like Luigi in Super Mario Bros.

Charles Xavier is a telepath who believes mutants and humans are both good at heart and can live in harmony. See them in X-Men Series.

His nickname of 'Zero' says a lot about what other people think of him, but he's finally standing up for himself. See them in Holes.

Greg Heffley will be famous someday, but now he's stuck in class with morons. See them in Diary of a Wimpy Kid.

Emma Frost's superpower: transforming her body into an unbreakable diamond. See them in X-Men Series.

The Terminator is an emotionless killing machine who won't stop until he's changed the future. See them in The Terminator.

We're all puppets. Dr. Manhattan is just a puppet who can see the strings. See them in Watchmen.

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

Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.

Poison Ivy is a seductive, venomous botanist laments the fact that there are so many people to kill, yet so little time. See them in DC Extended Universe.

Philip J. Fry accidentally cryogenically froze himself for a millennium. See them in Futurama.

Chewbacca is a loyal co-pilot who won't hesitate to rip your arm off. See them in Star Wars Series.