Criss Gluck

Backstory

criss gluck is a very pretty girl who was selected in slytherin, her family without a trace of any muggle or dirty blood was selected in ravenclaw and hufflepuff, he knew that he does not belong to a revenclaw was always in doubt, he did not know if he would be in slytherin or griffindor, always considered a slythindor (mixture of the two houses).
she wanted the power of the magical world and in her last year in the battle of hogwarts she came up with a fabulous idea to achieve it.
first told Voldy that he was going with the Death Eaters, and he did the same with Harry and told him that he would help him fight the Death Eaters.
When Voldemort and Harry fought, Criss killed Harry in the back and while Voldemort thanked him, she threw him an Avada Kedavra. Then he killed Hermione and took the power of the Ministry and the entire magical world. but darker than before