Hogwarts: This Dementor Wants to Be the Actor

"About me becoming a dementor and using my disguise ability to cause crazy trouble in Hogwarts" I, Reed, a former dementor on the run from Azkaban, and now a master of grooming at Hogwarts. Relying on the golden fingers I picked up from hunting similar species, I managed to get ashore and sneak into the school to become a professor. Student: "Professor, why is your patronus a dementor?" I drank my tea calmly: "Oh, because it's rebellious." This isn't the most outrageous thing. After disguising Voldemort, Voldemort angrily broke his wand: "Who is ruining my reputation outside! I am the Dark Lord, can I dance ballet in public?!" After disguising Dumbledore, Dumbledore looked at the prosperous Hogwarts: "It's broken! I'm a stand-in!" Now, my resume is as follows: [Azkaban Annual Volume King], [Hogwarts Movie King], [Voldemort's Designated Black Fan Leader], [Dumbledore Youth Edition]. So don't be surprised when your professor suddenly starts giving you extra lessons in a dementor-like way. He may just want to absorb the joy of "knowledge". ——While turning the entire magical world into my playground, I also want to settle old scores with those pure-blood nobles. Isn't this too much?