Because you like Bobby Singer in Supernatural

Sheldon Cooper is brilliant in every way except, well, interacting with any human being. See them in The Big Bang Theory.

James T. Kirk is more than ready to face the final frontier. See them in Star Trek.

Despite this being Robin Buckley's first rodeo with the strange things that go down in Hawkins, she is quick to adapt and proves herself to be a loyal friend. See them in Stranger Things.

Olive Hoover is an irrepressible child beauty queen (or would-be queen) who doesn't play by your rules. See them in Little Miss Sunshine.

He may be one of the Four Horsemen of the Apocalypse, but War still maintains a strong sense of honor. See them in Darksiders Series.

There are rumors that the Spirit was an Egyptian Pharaoh in his past, but without any memories, he doesn't know how true they are. See them in Yu-Gi-Oh! .

Jack Bauer is a terrorist fighter who is scared of nothing and no one. The clock is ticking! See them in 24.

A ball of cheerful energy, Pinkie Pie is as sweet as her name suggests and lives to bring others joy with laughter and parties. See them in My Little Pony.

Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.

Meg March might yearn for a life of ballgowns and diamond necklaces, but the boy she falls for doesn't have a penny to his name. See them in Little Women.

Shana is a red-haired warrior with a black-and-white worldview. See them in Shakugan no Shana.

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.