Because you like Crowley in Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch

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.

Anna Karenina doesn't want to be a respectable woman any more. She thinks respect was invented to cover the empty place where love should be. See them in Anna Karenina.

Genetically and cybernetically enhanced, Gamora was trained from birth to be one of the deadliest women in the galaxy. See them in Marvel Cinematic Universe.

Elena Gilbert is the quintessential girl-next-door who gets involved with the new "boy" at school. See them in The Vampire Diaries.

Jack's big imagination is never limited by his incredibly cramped surroundings. See them in Room.

Barry Egan has too many anger issues to list here. See them in Punch Drunk Love.

You'll never get Alaska Young. And that's the whole point. See them in Looking for Alaska.

Frank N. Furter is just a sweet transvestite with some not-so-sweet plans. See them in The Rocky Horror Picture Show.

Although Jareth seems like he's just a harmless romantic, his powers make him a formidable foe. See them in Labyrinth.

This suave con-man doesn't just want to become rich. Danny Ocean wants to rip off the guy who stole his wife in the biggest Vegas con. See them in Ocean's Eleven.

V is a violent anarchist with literally nothing left to lose. But, he might have a point. See them in V for Vendetta.

Dante Alighieri is a crusader fighting his way to absolution. See them in Dante's Inferno.