Because you like Richie Tenenbaum in The Royal Tenenbaums
Draco Malfoy
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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.
Severus Snape
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Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.
Castiel
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Castiel might be an immortal angel, but the human world is still more than a little confusing. See them in Supernatural.