Because you like Optimus Prime in Transformers

Wanderer is a Soul, a parasite sent into a host to take over their body, extracting information from them and colonizing their species. See them in The Host.

Juliet Starling is a cheerleader by day, gleefully unhinged zombie killer by night. See them in Lollipop Chainsaw.

Winn Schott is just your friendly neighborhood superhero support system. See them in Supergirl.

Javert is an inspector with a single-minded focus: to bring criminals to justice. See them in Les Miserables.

Harry Osborn is the privileged son of Oscorp's founder with a goblin-sized chip on his shoulder. See them in Marvel Cinematic Universe.

For somebody who won't answer questions, the enigmatic C.C. sure asks a lot of them. See them in Code Geass.

Hotheaded and arrogant, Kaneda is nevertheless fiercely protective of the biker gang he leads. See them in Akira.

Finn is the world's last human who's "all about" understanding right and wrong. See them in Adventure Time.

In a rag-tag group of kids determined to take down the imperialistic Fire Lord, Katara is the glue that holds them together. See them in Avatar: The Last Airbender.

Though seemingly caring and calm, this motel owner has a mysterious streak of intensity. See them in Psycho.

Sebastien Michaelis is a demonic butler who approaches life with effortless finesse and a diabolical streak. See them in Black Butler.

Nothing inspires dread like the mysterious, masked Man in Black. But what's he hiding? See them in The Princess Bride.