Moonlight reflections (Sirius Black X Reader)

Y/n is a rare species of Elf called a reflective moonshadow Elf. The moonshadow Elves have disowned y/n for disgracing her father. Y/n was living on her own until a strange man appeared to her and told her of a place called Hogwarts, a school for young witches and wizards to learn and practice magic. He told her that she would be safe and cared for there, but she wasn't to leave her secret room, or talk to any of the other students. Finally, she got bored of being by her self and one night she snuck out of her room to explore the castle, but runs into some trouble along the way. She bumps into none other than the infamous quartet, the marauders.