An old Harry Potter joke

Voldemort goes and knocks on Snape’s door. “Who is it?” Voldemort: “THE DARK LORD!!” Snape: “Sauron?” Voldemort: “No no, the other one” Snape: “Vader?” Voldemort, irritated, thunders: “THE ONE YOU FEAR THE MOST!!” Snape, confused: “Hermione??”