Because you like Sheldon J. Plankton in SpongeBob SquarePants

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

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

America Singer is a feisty, fiercely independent musician who places little value on the restrictive rules of her society. See them in The Selection .

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 .

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

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