Because you like Caleb Rivers in Pretty Little Liars

It's hard enough fighting a war. But it's worse for Commander Shepard, knowing no matter how hard you try, you can't save them all. See them in Mass Effect.

Told her son will one day save the world, Sarah Connor dedicates her life to training him to do just that. See them in The Terminator.

John Locke is an eerily calm, confident believer in the magic of the island that gave him his legs back. See them in Lost.

A bookish know-it-all with a bossy streak, Hermione Granger always stands up for what she believes in. See them in Harry Potter Series.

When Jessica Jones is not throwing back drinks, she's taking down bad guys with her strength, detective skills, and foul-mouthed insults. See them in Marvel Cinematic Universe.

As an undercover cop, Schmidt is getting to relive high school as a cool kid. See them in 21 Jump Street.

Homer Simpson is a beer-loving disaster in charge of nuclear safety in Springfield. Everybody run! See them in The Simpsons.

This power-hungry Time Lord calls himself the "master of all." Bonus: he has 13 lives. See them in Doctor Who.

Aiden Pearce is a hacker who knows how dangerous the world can be, both online and off. See them in Watch Dogs.

An aloof punk rock goddess, Nana Osaki has a surprisingly big heart. See them in Nana.

Genetically and cybernetically enhanced, Gamora was trained from birth to be one of the deadliest women in the galaxy. See them in Marvel Cinematic Universe.