Because you like Arwen in The Lord of the Rings

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

A bloodsucker, Carlisle Cullen is actually more likely to give you a blood infusion. See them in Twilight.

Lady Macbeth takes being a powerful woman to a whole other level. See them in Macbeth.

Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.

Dolores Umbridge keeps her villainy hidden (albeit poorly) behind a sheen of sugary pink politeness. See them in Harry Potter Series.

A cursed pirate captain, Barbossa is greedy, vengeful, and surprisingly cheeky. See them in Pirates of the Caribbean: the Curse of the Black Pearl.

White Witch's heart is as frozen as the land she rules. See them in The Chronicles of Narnia.

R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.

Merciless and manipulative, Queen Ravenna is determined to become the fairest of them all. See them in Snow White and the Huntsman.

There's more to this sweet, caring landlady than meets the eye. See them in Sherlock.

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

A legendary warrior with a complicated relationship to the truth, Jaime Lannister is revered and reviled in equal measure See them in Game of Thrones.