Because you like Leonard "Bones" McCoy in Star Trek

This power-hungry Time Lord calls himself the "master of all." Bonus: he has 13 lives. See them in Doctor Who.

Emma Frost's superpower: transforming her body into an unbreakable diamond. See them in X-Men Series.

Wheatley's got an endless supply of bad ideas that he wants to share. See them in Portal Series.

Belle is an adventurous, intelligent fairy tale maiden who strives to see the best in everyone. See them in Once Upon a Time.

Dorothy Gale is a down-home Kansas girl in a bizarre fantasy land with beautiful red shoes. See them in The Wizard of Oz.

Small and curious, he is a 50-year-old baby of a peculiar green species with unusual abilities. See them in The Mandalorian.

Jacob Kowalski is just a baker caught up in an otherworldly adventure. See them in Fantastic Beasts and Where To Find Them.

The Genie is the perfect buddy, granting every wish we might have and keeping life good-spirited. See them in Aladdin.

Matt Flamhaff is not too concerned about being part of the popular crowd. Too bad his best friend is. See them in 13 Going on 30 .

After surviving a CIA mission that was supposed to kill him, ex-military man John Reese bets it all on a chance to redeem himself. See them in Person of Interest.

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.

Often the one to deliver bad news to the families of victims, Jennifer Jareau isn't sure this is what she signed up for. See them in Criminal Minds.