Because you like Fred Mertz in I Love Lucy

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

A talented OBGYN, Addison Montgomery is trying to figure out the whole love and marriage thing. See them in Grey's Anatomy.

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

This power-hungry Time Lord calls himself the "master of all." Bonus: he has 13 lives. See them in Doctor Who.

Beth March is the glue that holds her family together. See them in Little Women.

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

A karate master/rocket scientist/squirrel, Sandy Cheeks is the only one who can clean up the other resident's messes in Bikini Bottom. See them in SpongeBob SquarePants.

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

Marge Simpson is a mostly happy housewife and subscriber to Sponge and Vacuum Magazine. See them in The Simpsons.

Li Shang will make a man out of you—even if you're a girl. See them in Mulan.

Not even a closed door will deter this eternal optimist. See them in Frozen.

Merry Brandybuck is a troublemaking hobbit with a brave streak that some might call foolhardy. See them in The Lord of the Rings.