Nox Monem, the Night Demon, is Cobra Commander's mysterious protector. Given the history of the Commander's personal bodyguard, Storm Shadow, he felt it necessary to find someone who would be totally loyal to him without the intervention of Mindbender.
Located and hired unbeknownst to any member of Cobra High Command, Nox Monem was rumored about in whispers. He was said to be Agent X-99 or even the Joe known as Snake Eyes.