Because you like The Master in Doctor Who

Boomerang is equally skilled at tossing boomerangs and tossing back beers. See them in DC Extended Universe.

Though he may be blind, Chirrut Imwe sees the power of the force more than most. See them in Rogue One.

Bobby Singer is a redneck ghost hunter, but all he wants to do is retire to the junk yards of South Dakota. See them in Supernatural.

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.

Ofelia is face-to-face with the deadliest creatures of the underworld and completely unafraid. See them in Pan's Labryinth.

Extremely violent and loyal, Sandor Clegane is called the Hound for a reason. See them in Game of Thrones.

There must be quite a lot of fellows who haven't got anybody to bring them tea in the morning. Bertie Wooster is lucky to have his valet, Jeeves. See them in Jeeves and Wooster.

A poised, stately man-out-of-time, Ichabod Crane typically faces the modern world with wry quip. See them in Sleepy Hollow.

Neal Cassidy is a charming former thief with a heroic side. See them in Once Upon a Time.

Beneath Arthur's brash demeanor lurks the heart of a compassionate future king destined to unite the five kingdoms. See them in Merlin.

Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.

Christine Palmer is a great surgeon and an even better friend. See them in Marvel Cinematic Universe.