Gryffindor's Banshee

The-Girl-Who-Lived reaches Hogwarts only due to ancient magic that returns her as a Royal Banshee after Uncle Vernon kills her to stop her from attending school. Even worse, Harriet was sexually abused from a very young age and was pregnant at the time of her death. Will the Wizarding world survive or has Dumbledore's blunder doomed everyone. Rated M (N,V,SC)