They say my name is Hermione

I only remember one thing. I use to want to be a butterfly, it was something I wanted to be when I grew up. I don't know why I know this. I don't know my life story. I don't know any of my friends. They only tell me my name is Hermione. "They" being my parents. I don't remember anything. I only know one memory and that's me wanting to be a butterfly. My so called parents they tell me I was in a plane crash. I don't even remember that. I try to think really hard but I end up making myself sick. Who am I? That is my main question.