Because you like Bill Cipher in Gravity Falls

Chuck Bartowski is a sweet, laid-back electronics store/top secret government employee. See them in Chuck.

This mathematical genius doesn't have time for small talk; Alan Turing needs to break Enigma, the Nazi's cipher machine. See them in The Imitation Game.

Hayley Stark is a sarcastic 14-year-old with an unusual passion. See them in Hard Candy.

Wanting more out of life, Pam Beesly has a job she isn't crazy about and is engaged to a guy she's not sure is "The One." See them in The Office.

Bobby Singer is a redneck ghost hunter, but all he wants to do is retire to the junk yards of South Dakota. See them in Supernatural.

Evan is a sensible kid, but being sensible isn't going to help him lose his virginity. See them in Superbad.

Spencer Reid's super-smarts helps catch killers, and his social awkwardness endears co-workers. See them in Criminal Minds.

Using a bracelet his late mother gave him, Apollo Justice can sense when other people are nervous based on even the most subtle signs. See them in Ace Attorney Series .

Brilliant, violent, and only a little insane, the Joker doesn't listen to anyone except the voices in his head. See them in DC Extended Universe.

Empathetic Nausicaa embraces all forms of life, even those that might scare other people. See them in Nausicaa of the Valley of the Wind.

Kenzo Tenma would have never guessed that ten-year-old he saved would later become a deadly serial killer intent on "thanking" him. See them in Monster (TV Show).

There's nothing like discovering dear old dad is a serial killer to send you into an (understandable) funk. See them in Hannibal.