Because you like Bill Cipher in Gravity Falls

Dee Reynolds is selfish, narcissistic, and a target of extremely cruel ridicule. See them in It's Always Sunny in Philadelphia .

While he might be too cool for school, Soul isn't too cool to do the right thing. See them in Soul Eater.

Bart Simpson is an aspiring juvenile delinquent who doesn't want you to have a cow, man! See them in The Simpsons.

You'll never get Alaska Young. And that's the whole point. See them in Looking for Alaska.

Walter White's knowledge of chemistry allows him to cook astoundingly pure meth, leading to a rapid – albeit tumultuous – rise in the criminal drug world. See them in Breaking Bad.

The best part of Yelena Belova's life was fake and no one told her. See them in Marvel Cinematic Universe.

All the world's a stage, and Missy Piggy's never one to give up the spotlight. See them in The Muppet Movie.

When dealing with a half-demon partner and a world of violence, Kagome Higurashi has plenty of chances for her true courage to shine. See them in Inuyasha.

For Sly Cooper, stealing isn't just about the haul. It's also about the journey. See them in Sly Cooper.

Red doesn't like to explain herself. She wants her work to do the talking. See them in Transistor.

Whatever Sakura Haruno lacks in power, she makes up for in intelligence and bravery. See them in Naruto.

After alien Haruko rides in on her Vespa, giant robots spouting from Naota Nandaba's forehead soon become the least of his worries. See them in FLCL.