Xia Yan, a sophomore female student in high school, traveled through time and became Elizabeth Gaunt, the last member of the Gaunt family besides Voldemort. In order to seduce Sirius, she used the ability of Metamorphosis Magus to become her appearance before time travel, made up a name and went to Gryffindor to trick everyone that she was a Muggle; every night she spent half an hour in Slytherin as Elizabeth Gaunt.
She destroyed all the Horcruxes, and her friends discovered her dual identity, except for her lover Sirius. Finally, Sirius, who hated pure-blooded Slytherins the most and hated dark magic, had to admit that his beloved Muggle girl was actually a pure-blooded Slytherin? Or Grindelwald's granddaughter?
Friendly reminder:
This article removed the official cast and assigned Lupine a smart and calm Ravenclaw girl. The heroine's mother was given birth to Grindelwald after being drugged with a love potion. She was considered an illegitimate daughter. Grindelwald did not know that he had a granddaughter at first.
Purpose: Sirius, who hates Slytherins the most, discovers that his Gryffindor Muggle girlfriend's true identity after falling out of love is a pure-blood Slytherin! She is also Grindelwald's granddaughter! A relative of Voldemort? ? ?