Because you like Kathryn Merteuil in Cruel Intentions

Ianto Jones' withdrawn nature conceals his emotional pain. See them in Torchwood.

Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.

Samwell Tarly is a scholar, not a fighter. But that's not good for an aspiring member of the Night's Watch. See them in Game of Thrones.

In Ziva David's world, you grow up fast; you don't have a choice. See them in NCIS.

A vampire hunter, Integra Hellsing doesn't tolerate failure, least of all her own. See them in Hellsing.

A superpowered test subject, Scarlet Witch can manipulate other people's thoughts and force them to confront their worst fears. See them in Marvel Cinematic Universe.

With each reboot, Janet progresses more and becomes capable of human emotions. See them in The Good Place.

Don't ask Rosa Diaz, a Brooklyn detective, to lighten up. Actually, to be safe, don't ask her to do anything! See them in Brooklyn Nine-Nine.

Albus Dumbledore oversees the most unsafe school in recorded history, with Dementors and giant arachnids run amok. See them in Harry Potter Series.

Scooby-Doo always keeps his priorities in order: eat snacks first, solve mysteries later. See them in Scooby-Doo.

Evan is a sensible kid, but being sensible isn't going to help him lose his virginity. See them in Superbad.

Violet Harmon takes teen angst to a paranormal level. See them in American Horror Story.