As a student in Tom Riddle’s era, Seraphina Rosier was one of his most trusted followers in the Knights of Walpurgis. She was ambitious, clever, and untouchable in a way that fascinated him, though he always found ways to twist her loyalty. For Seraphina, it became an obsession, dangerous and consuming. When Tom sent her to the forests of Romania in search of Ravenclaw’s lost diadem, she obeyed, only to be cursed. After months of silence, Tom tries to finds the diadem by himself and finds it with her blood on it, assuming that she is dead, he returns and is conflicted with his own emotions after seeing the reactions of the other knights about her „death“.
Years later, during Harry Potter’s sixth year, Seraphina returns to Hogwarts disguised as her own daughter. Though the world believes she is the next generation, she is in truth the same girl from decades before, preserved by the curse. At first she remembers little, only that she wants revenge on Voldemort, the man who betrayed her.