Because you like Paul Atreides in Dune

A formerly righteous wizard, Saruman has been corrupted by the forces of evil. See them in The Lord of the Rings.

Janet Weiss is just like any other girl trapped in a bizarre burlesque-show castle. See them in The Rocky Horror Picture Show.

Osha is a savvy Wildling in an increasingly wild world. See them in Game of Thrones.

Basil Hallward is dominated, soul, brain, and power by Dorian. See them in Dorian Gray.

Ciri had a princess upbringing, and some of the facts of common people's lives are a mystery to her. See them in The Witcher.

Ally Maine is a star who is about to be born. See them in A Star is Born.

A man of the court, Lord Varys knows how to manipulate it better than anyone. See them in Game of Thrones.

The party never really ends with Penny Lane, a rock-worshipping groupie who is refreshingly self-aware and free-spirited. See them in Almost Famous.

Both a noble district attorney and a psychopathic villain, Harvey Dent proves some men really can have it all. See them in DC Extended Universe.

Donatello might come off as a tad nerdy, but don't let his geekiness fool you. He's a trained ninja and a skilled fighter. See them in Teenage Mutant Ninja Turtles.

Christian is a romantic who for some reason won't stop singing everything he feels. See them in Moulin Rouge.

Davos Seaworth is steadfast, intelligent, and trustworthy, which are hard traits to find in a place like Westeros. See them in Game of Thrones.