You are new student at Hogwarts. You are in 5th year, same year as Harry, Ron, Hermione, Draco... You was in homeschool, but now you are starting in Hogwarts. You are the daughter of Lord Voldemort and Bellatrix Lestrange, but anyone doesn't know it, except Dumbledore. You was yesterday (when you came to Hogwarts) sorted into Slytherin. Now you are in Great Hall eating breakfast