The Nightmare Nurse is a demonic healer named Asa, who eventually became a ally of both Justice League Dark and the Suicide Squad. She was originally the housekeeper of Alice Winter in the House of Mystery, but she decided it would be better if she possessed the younger woman's body as her current host was old and decrepit and Alice was very sick. Asa is also a very powerful magic user.

Nightmate Nurse was created by Dan DiDio, J.M. DeMatteis and Philip Tan, first appearing in The Phantom Stranger (Volume 4) #8 (2013).read more