Because you like Dorothy Vallens in Blue Velvet

Hell hath no fury like an evil fairy scorned. See them in Maleficent.

A daring conman, Flynn Rider is so charismatic that you might not mind when he steals from you. See them in Tangled.

When the Sorting Hat touched Draco Malfoy's head, it placed him in Slytherin, a house that has turned out more dark wizards than any other. See them in Harry Potter Series.

With great power comes great responsibility, but Peter Parker always seems to get the short end of that bargain. See them in Marvel Cinematic Universe.

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

L is enigmatic, child-like, and one of the smartest people in the world. See them in Death Note.