Supernatural x angel!Reader/demon! I made myself your little sibling, so I'm sorry if you don like it, but you're still the main character. After loosing her parents and getting the powers of both an angel and a demon, (y/n) takes care of her younger sister, who posses the same powers, as they hunt and learn about the weird side of the world together. That's how it was for three years, until they met the Winchesters.