Because you like Jason Voorhees in Friday the 13th
Don't ask the ruthless queen of the Tokyo underworld any questions unless you're fine with losing a limb. See them in Kill Bill vol. 1.
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.
Playing his cards close to his vest, J. Daniel Atlas believes the closer you look, the less you see. See them in Now You See Me.
Despite Norman Bates' typically kind and shy personality, he is also prone to occasional violent outbursts. See them in Bates Motel.
A scary monster on the outside, James P. Sullivan is really a softie on the inside. See them in Monsters, Inc..
Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.
Merciless and manipulative, Queen Ravenna is determined to become the fairest of them all. See them in Snow White and the Huntsman.
Jesse Aarons' frustration can only find outlet in another world. See them in Bridge to Terabithia.
Disgust is a friend who makes sure you stay away from all things gross. See them in Inside Out.
Egon Spengler prefers collecting spores, molds, and fungus to interacting with people. See them in Ghostbusters.
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.