Proxima Midnight is a Marvel Comics character and supervillain who appeared as one of the secondary antagonists of both Avengers: Infinity War and a supporting antagonist in Avengers: Endgame. She is a high-ranking member of the Black Order who has undying loyalty to Thanos.
Proxima Midnight was created by Jonathan Hickman.
Proxima Midnight is fiercely loyal to Thanos. Her harsh, unforgiving training at his hands has rendered her fierce, arrogant, and sadistic.