Because you like Pearl in Steven Universe
Dorothy Gale is a down-home Kansas girl in a bizarre fantasy land with beautiful red shoes. See them in The Wizard of Oz.
Jade Jade Harley might not be the best at reading social cues, but her bravery and selflessness means she's a great friend to have. See them in Homestuck.
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.
Milo Thatch is an enthusiastic researcher without cynicism. See them in Atlantis: The Lost Empire.
Vanellope von Schweetz is princess of the Sugar Rush game who could care less about being royal. See them in Wreck it Ralph.
Patrick Star enjoys life's simple pleasures because he can't wrap his brain around anything more complicated. See them in SpongeBob SquarePants.
Viking Astrid Hofferson has it all: brains, brawn, and some killer braids. See them in How to Train Your Dragon.
Donkey is proof that if you're annoying enough you can change the world; he's the reason that his friend Shrek does, well, anything. See them in Shrek.
Tail's smarts and helpful nature come in handy in a pinch. See them in Sonic the Hedgehog.
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.