Because you like Mrs. Hudson in Sherlock
Maya Lambert is an obsessive intelligence officer with tunnel vision leading toward Osama bin Laden. See them in Zero Dark Thirty.
Emmet Brickowski is so upbeat it's not even human. Everything is AWESOME! See them in The Lego Movie.
Artemis Fowl understands the way of the world. If he wins, he's a prodigy. If he loses, then he's crazy. That is how history is written. See them in Artemis Fowl.
Simon Belmont is a vampire hunter bravely carrying on the family business. See them in Castlevania.
Carrie Bradshaw is a sex columnist addicted to expensive shoes, Cosmopolitan martinis, and unavailable men. See them in Sex and the City.
It's certainly easier to get great footage of crimes when you can guarantee they'll happen. See them in Nightcrawler.
Georgina Sparks uses beauty, brains, and power to always get her way. See them in Gossip Girl.
Dipper Pines is investigating a truly strange town during the world's wildest summer vacation. See them in Gravity Falls.
Tobias "Four" Eaton is only afraid of four things, but you should probably be afraid of him. See them in Divergent.
Eren Jaeger will erase the Titans from this world until not a single one remains. See them in Attack on Titan.
Mario is a plumber who wears a ridiculous outfit, eats weird looking mushrooms, and fits himself inside your pipes so he can save a princess. See them in Super Mario Bros..