Prologue: the little girl and the witchling
Once, there was a young girl named Ellen.
Ellen was a thoughtful child, and smart for her age. Though in much pain due to her physical illness, she lost much hope of living a normal life. Until one day, she met a black cat without a name. This cat showed her powers unimaginable by man. The price of such power, led Ellen to do the unthinkable.
There once was a young girl named Viola.
She was the vision of a sweethearted young girl. She was kind beyond measure, and always stood at the side of good. One day, she ran into the woods and met Ellen at her mansion. Inside this mansion, she saw Ellen in pain. Viola came over to the mansion every day, helping Ellen to get better. She thought that Ellen was her friend. One day, Ellen had made a proposal.
"switch bodies with me, for one day. I just want a day without pain. Please?" Ellen said to her friend.
"alright, I will." said Viola, as they crossed their pinkie fingers as a promise.
Ellen, was not at all chivalrous, nor was she empathetic at what she had decided to do.
Ellen used a small saw to cut off her legs, empairing the girl's ability to walk, and gouged out her eyes, empairing her ability to see.
Then, after she had done the swap with Viola, she quickly gave her "medicine" that burned at her thoat. She could no longer speak.
Ever after she tried to kill Ellen several times in the mansion with her magic, Viola chased Ellen into the woods, and afterwards, was killed by her own father. After Viola had supposedly died, Ellen went to Viola's home, with Viola's father, and had a good night's sleep. After the cat consumed Viola's soul, fragments remained. Fragments of purity, but also malice. These fragments allowed Viola to restore Ellen's body.
Viola made a decision at that point not to kill Ellen, but to help her. After all, that is what friends are for.