Created by Doug Moench and Don Perlin, Moon Knight first appeared in Werewolf by Night #32 in 1975. Marc Spector’s story is defined by his struggle with , which manifests as several distinct personalities (alters) that inhabit his body.

The 2022 Disney+ miniseries brought the character to a global audience, starring Oscar Isaac as Marc Spector and Steven Grant. Watch Assembled: The Making of Moon Knight | Disney+

The primary identity, a former mercenary with a background in the military.

After being left for dead in the Egyptian desert, Marc is resurrected by . In exchange for his life, he serves as Khonshu's agent on Earth. Their relationship is often portrayed as manipulative, adding to the character's internal conflict and themes of guilt and redemption.

While Moon Knight is often a "street-level" vigilante relying on peak human conditioning and detective skills, his powers can fluctuate based on the phases of the moon, sometimes granting him enhanced strength or speed.