"Ashildr Mikaelson is Klaus Mikaelson's twin sister, but that's not all she was." Ashildr Mikaelson is the Mate of the Original Hybrid Nikalus Mikaelson But she is also an Original Hybrid. See, Niklaus and Ashildr are twins, they share a bond, a more extreme bond than siblings should have. They are Mates, the special Original Hybrid Twin Mates. Follow the story of the world in the eyes of the supernatural. Vaguely following the series plot. All rights for the Vampire Diaries go to the show runner of the show and the author of the books.