There are plenty of traits and attributes that make Moon Knight a unique member of the superhero community - his moon-themed accessories, his connection to Egyptian lore, his terrific all-white ensemble - but chief among them is his ongoing experience with dissociative identity disorder (DID). Often regressively and reductively referred to as having “multiple personalities,” DID involves the presence of two or more distinct identity states within a single mind. Oftentimes, it’s accompanied by memory lapses and, in the most extreme of cases, it can lead to a person living out more than one distinct life.
As such, it’s not quite as simple as saying that Moon Knight’s alter ego is former mercenary Marc Spector. That’s true, but Spector has also spent significant portions of his life as millionaire playboy Steven Grant and as cab driver Jake Lockley. Sometimes, Spector enjoys an ongoing dialogue with his alters. Other times, they live entirely separate lives, and he’s none the wiser as to their actions. It’s led to a rather confusing existence for Spector, and all those around him - except for the villains who threaten those who travel by night. To them, Moon Knight is a frighteningly straightforward concept.