Because you like Iroh in Avatar: The Last Airbender

Sue Sylvester has a win-at-all-costs philosophy, a bizarre fixation on a school singing club, and a fashion style that involves a red tracksuit. See them in Glee.

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

Turanga Leela is the daughter of two mutants who live in the sewers below New York City. See them in Futurama.

Loyal to his family and associates and distrustful of anyone else, Tony Soprano is a good guy to have on your side. See them in The Sopranos.

The brilliant Mona Vanderwaal is proof that undergoing an "extreme makeover" isn't always a good thing. See them in Pretty Little Liars.

Claire Standish is a popular, perfect princess who's deeper than she seems. See them in The Breakfast Club.

There's more to this sweet, caring landlady than meets the eye. See them in Sherlock.

Sydney Novak claims she’s “not special,” but her self-reportedly average life changes quickly once she begins to develop powers she can’t control. See them in I Am Not Okay With This.

If this slick ad man doesn't like the conversation, he changes it—while drinking and smoking. See them in Mad Men.

Jasper Jordan is trying his best to make it through the night. See them in The 100.