Because you like Egon Spengler in Ghostbusters

Smart, sarcastic, and loyal, Stiles Stilinski doesn't just want to be the sidekick in someone else's life. See them in Teen Wolf.

Maddy Perez seems like an angel until she opens her mouth. See them in Euphoria.

Teddy Sanders loves his frat brothers so much he might never leave school. See them in Neighbors.

Cinder has been beaten down by the world, but she's learning that her cyborg abilities are pretty helpful. See them in Cinder .

Formerly a "sweater-set-wearing, mojito-drinking sorority girl", Paige Collins is now a successful sculptor with slight memory loss. See them in The Vow.

Sam Roth is sensitive, musically gifted, and scarred by his past. See them in Shiver .

Cutting ties with her con-artist friends, Sarah Manning is creating a better life for her daughter by taking on the identity of the deceased Beth. See them in Orphan Black.

After becoming accepted into the group of popular girls, Tracy Freeland has turned from a sweet and reserved teenager into a monster. See them in thirteen.

Rose Hathaway is a reckless, rebellious smartass who's training to be a royal vampire guardian. See them in Vampire Academy.

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

Dimitri Belikov is a stoic vampire guardian who has the reserve, focus, and discipline of a soldier. See them in Vampire Academy .

Will Herondale is an emotionally distant bad boy with a secret. See them in Clockwork Angel .