Lucille Black and Onyx Malfoy are the most famous duo of Hogswart. They've been friends since first year and are always up to no good. Onyx only allows Lucille and Draco to call her Onny and Lucille only allows Onny and draco to call her Lucy. Onyx has an older brother Draco Malfoy. Onyx is dating Blaise Zabini.