Because you like Nick O'Leary in Nick and Norah's Infinite Playlist

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.

Don't tell anyone Kate Austen was under arrest when the plane crashed. See them in Lost.

Amy March blends her naturally artistic spirit with a sense of practicality. See them in Little Women.

Whether it's getting a deal or finishing a homework assignment, Jessica Huang demands nothing less than the best from those around her. See them in Fresh off the Boat.

Nomi Marks is a brilliant hacker with an open-minded, accepting spirit. See them in Sense8.

Years of constant assault by mean classmates, rude teachers, and her abusive mother is making Carrie White want to fight back. See them in Carrie.

Jax Teller can be cool or vengeful, calm or wrathful, depending on the situation. See them in Sons of Anarchy.

Manipulative, conniving, and ruthless, Mr. Gold is enigmatic no matter what world he's in. See them in Once Upon a Time.

Foul mouthed and disturbingly comfortable with violence, Hit-Girl is a precocious assassin who doesn't need anyone's protection. See them in Kick-Ass.

Felicity Smoak is a brilliant hacker who nonetheless becomes tongue-tied in front of attractive men. See them in DC Extended Universe.

Keren Walker is a socialite looking to avoid work, keep a constant buzz, and be as snarky as possible. See them in Will & Grace.

A photographic memory is just one of many skills Lexie Grey brings to the table as a surgeon. See them in Grey's Anatomy.