Because you like Brian Griffin in Family Guy

This high school queen bee has everything, including a genius-level IQ—a fact Lydia Martin keeps hidden to maintain her image. See them in Teen Wolf.

Sarah Ashburn lives life by the book and has trouble getting along with anyone who doesn't do the same. See them in The Heat.

Regina Mills is a cold evil queen turned chilly town mayor. See them in Once Upon a Time.

Jesse Tuck dreams of finding someone to join his unusual family. See them in Tuck Everlasting.

A benevolent madman with a blue box, The Doctor is traveling through time and space to heal the wounds of the universe. See them in Doctor Who.

John Watson is haunted by his past (who isn't) but he's starting to branch out with some help from a world class detective. See them in Sherlock.

Duck, girl, and legend: Ahiru's identities confuse even herself at times, and she often wonders which of them is truly her. See them in Princess Tutu.

A girl who grew up on stories, Meggie Folchart is as loyal and intrepid as one of her fictional heroines. See them in Inkheart.

Tyler Gage is going to have to step up soon on the dance floor. Otherwise, it's back to janitorial work. See them in Step Up.

Whether he's fighting or flirting, Jace Wayland is all swagger. See them in City of Bones.

Raised to happily follow the rules, Cassia might actually be more rebellious than she thinks she is. See them in Matched .

She got locked up so her husband could make it big, but now Cookie Lyon is coming for what's hers. See them in Empire.