Y/N is the most strongest witch of her time. She got moved to hogwarts in 1942 for her protection . Tom Riddle and the knights of walpurgis don't take much mind towards her as she seemed like a normal transfer student . Little did they or anyone else know , Grindewald was after her and Dumbledore was her "protector" . Not only that y/n is half siren and she doesn't even know that yet which is one of the reasons why grindewald is after her .Tom Riddle and Y/N will have a slow burn and they will fall in love .