The Dark Sister

My name is Ranae. I've lived a life where weird things have always happened around me. I used to live in an orphanage before I ran away. I now live alone, visited every other day by my honorary sister Sophie who is three years younger than me. I treat, love, and protect her like a little sister. I thought my life would forever be this way, lonely with only my sister as company and making food and drinks magically appear in front of me. But my life changed forever one day when I turned 11 years old and met an old lady who goes by the name of Professor Mcgonagal.