Nightmare is a anthropomorphic black dragon with a purple under belly and a white  hair. She is the Crystalist Guardian of Darkness and while she looks evil, she not really evil. She tend to use her shadow minons to take care of her and where she lives, even to help others. In a fight, she use her minons to hold her opponent down so she can beat them down with punches and kicks. She is really good with dark magic attacks and she is the older sister to Flamey.