Harry sighed. "Not like how you’re thinking, but as a sister. She is the one person who never let me down when it really counted. Everything she did was to protect me. She gave up her own parents and risked her life to help me. You have no idea how much Wizarding society owes her, the debt I owe her. When she asked for my help, I did not have to think long on it. I was not going to let her go off by herself into a strange world. I don’t have a clue about the math, physics or science of what she’s so fascinated by, but if she ever needs a power boost, I’m here."