While most people would most likely be rather upset when they were proven wrong, the Devil/Vampire known as Shalltear Bloodfallen was currently feeling annoyed by the fact that her suspicions about the Defense Against the Dark Arts-teacher, Professor Quirinus Quirrel, were proven to be well founded. Unlike her fellow Devils, Shalltear was able to get a better reading of someone's magical presence due to not only her vampiric heritage but also her centuries of experience, both on and off the battlefield, being able to get a read on the nature of magical presences while Enuma could at most get a read on how magically powerful someone was compared to herself.
The man had two magical presences, which was only supposed to be possible for either a person with mixed magical heritage, a prime example being the Bishop of Rias Gremory's Peerage, Gasper Vladi, a fellow Devil/Vampire, or women who were carrying a child, with the two presences belonging to the woman herself and her unborn child. Of course in the latter case of the normal cases where someone had more than one magical presence, the number of unborn children in a woman's womb increased the number of magical presences in her. And since Quirrel wasn't of mixed heritage or female, the normal causes for having mixed or multiple presences didn't apply. Which meant that something was clearly wrong, and Shalltear had a few suspicions about what that something wrong was.
"Professor Quirrel." Stated the Vampire politely to the Defense Against the Dark Arts teacher.
"Miss B-B-Bloodf-f-f-fallen." Replied the professor, stuttering on the Bloody Valkyrie's last name.
"Cut the act will you. It's obvious that the stutter is fake."
"I see that nothing escapes the Bloody Valkyrie. What do you want?"
"For starters, care to explain why you have more than one magical presence? And you better hope that I like your answer."
"Let me speak with her." Demanded a third voice, who seemed to make Quirrel nervous.
"But master, you're not strong enough to-"
"I'm strong enough for this!"
"Under-st-t-tood." Shalltear raised an eyebrow, but remained passive, as the Defense Against the Dark Arts teacher turned away from her and started undoing his turban., revealing a face on the back of his head.
"Who in seven hells are you?"
"A foolish question. I'm the most powerful Wizard to walk the earth. I am Lord Voldemort!" Replied the face on the back of Quirrel's head.
"…Am I supposed to be impressed or something?"
"What?"
"I've faced warriors several times more powerful than you on the battlefield throughout my life and won. What makes you think I'd ever be impressed by anything you have accomplished? Besides, you're the reason why my King is in therapy, and for that crime, you must be punished. I'm not someone who you pathetically believe that you can recruit for your equally pathetic cause. I'm your executioner. Any last words?" Inquired Shalltear as she calmly walked up to the literally two-faced man while shape-shifting her fingernails on her right hand into a wicked set of claws, pulling her arm back in preparation for an attack and pulling out a goblet from her pocket.
"Quirrel! Do something you fool!"
"Yes master!" Replied Quirrel in a tone of obvious panic. He didn't however get the chance to do anything as a hand suddenly burst through his torso, holding his still beating heart.
"Shalltear wins. Flawless victory. Fatality!" Exclaimed the Bloody Valkyrie with pride to herself as she pulled her arm back and crushed the heart of the now dead Defense Against the Dark Arts teacher in her hand, filling her goblet with blood which she took a sip from as she shape-shifted her fingernails back to normal. "Victory tastes good. Tergeo." Just as she effortlessly cast the simply named Wiping Spell on her right hand, removing the blood from it, Shalltear's phone suddenly made a noise similar to the exaggerated noise of gushing blood often heard on tv. She had just received a text message, and considering that she knew not a lot of people had her phone number, it was probably from Enuma. A quick check and the Queen of Enuma Gremory's Peerage teleported to her King's location, leaving the room empty with nothing but the corpse of the former professor remaining.