She is a evil and heartless queen. She is a skeleton that has black goop running all over her body. She has several tendrils that come out of her back and the are very strong, they could hold a car. Her arch nemesis is her sister Dream, the queen of positivity. Nightmare is the queen of Negativity. Nightmare wears a beautiful and elegant black gown. Nightmare has a slight soft spot for the people who work for her, and people who are defenseless. Nightmare can be flirty at times.