Demigods-who-lived

Harry wasn't the only child of Lily Potter, he had a sister and a brother, they were triplets. Not anymore, Harry and Harriet are the only Potters. But, Hogwarts isn't ready for the two demigod children. Will Dumbledore try and manipulate them even more, will he be humiliated? Will the Potter's find out their identities? How will Harriet's short temper deal with the prats?