Nyx Nightingale was a member of the Department of Mary Sues. After a brief, involuntary period with the Department of Internal Security, she was instrumental in bringing about the Reorganisation, but had to flee the PPC and operated independently until the end of the Black Cats' invasion, when she returned to the PPC with Tango Dioxide and Dassie Hyrax. At some point in 2008, she wrote a poem called "Lofty Skies." She is written by Huinesoron.