Because you like Richard Belding in Saved by the Bell
Greg Heffley will be famous someday, but now he's stuck in class with morons. See them in Diary of a Wimpy Kid.
This master marksman may be a villain, but Deadshot's motives aren't quite as selfish as they seem. See them in DC Extended Universe.
Hoban Washburne shows you can be a hotshot space pilot *and* play with dinosaurs. See them in Firefly.
Rupert Giles is a librarian on the outside, fearless evil-fighter on the inside. See them in Buffy the Vampire Slayer.
Troy Bolton is a triple threat: singing, dancing, and basketball. See them in High School Musical.
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.
Turanga Leela is the daughter of two mutants who live in the sewers below New York City. See them in Futurama.
From secret organizations to alien attacks, Kyon's life has been one weird, unexplainable thing happening after another. See them in The Melancholy of Haruhi Suzumiya.
Jeff Winger thinks he's too cool for school, which is a problem because he just enrolled in community college. See them in Community.
Tom Hansen is a full-fledged romantic impatiently waiting for his love story. See them in (500) Days of Summer.
Strong-willed Norah Silverberg isn't willing to be the goody bag at anyone's pity party. See them in Nick and Norah's Infinite Playlist.
Chloe Decker's case should be open-and-shut. But something seems to be troubling her, something about Palmetto Street. See them in Lucifer.