Because you like Harry Callahan in Dirty Harry

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.

Alex DeLarge likes his favorite milk-based, drug-laced cocktail. It helps him get in the mood for a night of "ultra violence." See them in A Clockwork Orange.

Rupert Giles is a librarian on the outside, fearless evil-fighter on the inside. See them in Buffy the Vampire Slayer.

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

Anywhere there's adventure, Jaskier is there to write a catchy song about it. See them in The Witcher.

A legendary warrior with a complicated relationship to the truth, Jaime Lannister is revered and reviled in equal measure See them in Game of Thrones.

The irrepressible Lucy Ricardo has never met a challenge she couldn't scheme her way into or out of. See them in I Love Lucy.

Ava may just be the perfect woman. So long as she can pass a Turing test. See them in Ex Machina.

Combining an innocent face with an insatiable bloodlust, Eli recruits friends to join the vampire way of life. See them in Let the Right One In.

Cosmo Kramer is an eccentric schemer whom you might know better as the "Assman." See them in Seinfeld.