Because you like Miles "Tails" Prower in Sonic the Hedgehog
A grumpy tourist trap owner, Grunkle Stan has a few deep secrets. See them in Gravity Falls.
Years of brutal winters, foreign invasions, and crippling loneliness have left Russia's mental state far from wholly intact. See them in Axis Powers Hetalia.
Christine Palmer is a great surgeon and an even better friend. See them in Marvel Cinematic Universe.
Chuck Bartowski is a sweet, laid-back electronics store/top secret government employee. See them in Chuck.
Randy Marsh is a geologist and Nobel Prize winner who is into binge drinking, starting riots, the Food Network, and P.F. Changs. See them in South Park.
Hoban Washburne shows you can be a hotshot space pilot *and* play with dinosaurs. See them in Firefly.
The crown prince of the Fire Nation, Zuko has been ordered by his father to find the long-lost Avatar before he is allowed to return home. See them in Avatar: The Last Airbender.
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.
Toph is a tenacious earthbender full of spirit and spunk and hates when people try to baby her because she's blind. See them in Avatar: The Last Airbender.