Because you like John Blutarsky in Animal House
A scary monster on the outside, James P. Sullivan is really a softie on the inside. See them in Monsters, Inc..
Jackie Burkhart is a privileged princess with a healthy dose of self-confidence. See them in That '70s Show.
Donna is boisterous and spunky traveller of the TARDIS, exploring worlds beyond the simple mundane enterprises of Earth. See them in Doctor Who.
Steve Stifler is more than just a dude with a hot mom. He's also rude, profane, and obnoxious. See them in American Pie.
Margaery Tyrell is one of the most adept and charming liars there is. See them in Game of Thrones.
Disgust is a friend who makes sure you stay away from all things gross. See them in Inside Out.
Duck, girl, and legend: Ahiru's identities confuse even herself at times, and she often wonders which of them is truly her. See them in Princess Tutu.
Donna Carmichael is a free-spirited single mom and gracefully aging hippie. See them in Mamma Mia!.
Philip J. Fry accidentally cryogenically froze himself for a millennium. See them in Futurama.
Milo Thatch is an enthusiastic researcher without cynicism. See them in Atlantis: The Lost Empire.