Wake Me up Inside

Hope (main character) has been an orphan since she was 10. Her mother died of cancer and then her father took his own life. She has always attended Hogwarts and only has one friend there, Luna Lovegood. Everyone thinks she's a bit weird because if she ever talks, which she hardly does, it is at a whisper. She lives with a foster family but they don't have much tolerance for her as they think she's a bad influence on their younger children.