The seven devils

"I would slit your throat before you got past Avada, Riddle."
In 1926, Grindelwald is captured for the first time by Newt Scamander, making his followers go into hiding. The Petrov family, an ancient pure-blood eastern European family, is forced to flee to Romania while chased by the Ministry of Magic. While waiting for Grindlewald's return, the family has their first daughter, Varya Petrov. Soon after, her parents are killed by Grindleward's enemies. After attending Scholomance, a small magic school hidden in the depths of Transylvania's forests, for four years, she is called to Hogwarts. Dumbledore has a mission that only she will be capable to do: to stop Tom Riddle from succumbing to his darkest desire. Varya only has one wish: to redeem her parents' mistakes and find her place in the wizarding world. She will do anything to achieve it, even if it means changing the devil's fate.