Because you like Ethan Hunt in Mission: Impossible

Aang is already a master airbender and once he learns to manipulate water, earth, and fire, he'll be truly unbeatable. See them in Avatar: The Last Airbender.

R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.

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

Greenpeace? No, this brave eco-terrorist is waging Greenwar. See them in Final Fantasy Series.

A 100-plus-year-old who looks like a dreamy teenager, Edward Cullen warns girls to avoid him, which makes them want him even more. See them in Twilight.

If you need her, Lisa Simpson will be in her room with her saxophone and a good book. See them in The Simpsons.

Yuki Cross is a cheerful, funny, bold young woman with hidden insecurities. See them in Vampire Knight.

A formerly timid caterpillar, Kurt Hummel is transforming into a glamorous, confident butterfly. See them in Glee.

Jim Halpert is a master at the art of making it through the work day, including participating in an office Olympics. See them in The Office.

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

Stewie Griffin is just your average evil-genius, talking, sociopathic baby. See them 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.