Changeling

Harriet Potter vanishes one night while out camping with the Dursleys, black-haired, and green-eyed, with rounded, human ears. Harriet Potter returns on her eleventh birthday, white-haired, and green-eyed, with pointed ears. A fey child displaced from the home she made for herself - and a child determined to find her way back home. No matter what the humans think. Fem!Fae!Harry.