Because you like Jesse Swanson in Pitch Perfect
Frederick Frankenstein is an eccentric (O.K., maybe a little insane) professor who is excited to be delving into his family's past. See them in Young Frankenstein.
Janet Weiss is just like any other girl trapped in a bizarre burlesque-show castle. See them in The Rocky Horror Picture Show.
Louis de Pointe du Lac is wanting to find a way of living that doesn't make him miserable. See them in Interview with the Vampire: The Vampire Chronicles.
Merry Brandybuck is a troublemaking hobbit with a brave streak that some might call foolhardy. See them in The Lord of the Rings.
Being beautiful and rich doesn't guarantee happiness for Cheryl Blossom. See them in Riverdale.
Oscar Martinez is a national accountant in an office of weirdos. See them in The Office.
Chef is a swinging bachelor and former R&B singer with a leopard-skin upholstered couch and some great stories. See them in South Park.
Chaos is what killed the dinosaurs, and there's nothing Jason "J.D." Dean loves more than chaos. See them in Heathers.
Amy Santiago likes following the rules a little too much. See them in Brooklyn Nine-Nine.
The Ice King is lonely and looking for a princess to sweep him off his feet. See them in Adventure Time.