Khonshu is a real-world mythological deity who was worshipped in antiquity. His name means “traveler,” referencing the moon’s apparent transit across the night sky. Khonshu was said to protect those innocents who traveled at night, giving his name another layer of meaning. His role in mythology was as “the light of the night,” a warm protector who comforted people when they were sick or frightened.
Marc Spector is the “host” personality of the collective that comic readers know as Moon Knight. He created three distinct alter egos to aid in his crime-fighting: Moon Knight, the masked avenger; Steven Grant, the millionaire investor; and Jake Lockley, the streetwise cabby. In Marc’s case, his DID likely arose due to his brutal career as a mercenary and his multiple close brushes with death.
In the comics, Marc Spector is a mercenary who becomes Moon Knight after he is nearly killed in an altercation with mercenary Raoul Bushman while on a mission in Egypt. Marc, near death, sees a vision of Khonshu, who offers to save his life if he’ll agree to become the deity’s new avatar. Marc agrees and is reborn as the super-powered Moon Knight.
In the Disney+ series, Steven is a gift shop employee who is unaware of his role as an alter in a DID collective. In reality, Steven is a secondary personality to host Marc, a mercenary who leads a secret life without Steven’s knowledge. The show’s version of Steven is woefully ill-equipped for superhero work, as he abhors violence and is largely incompetent in combat.
In the Disney+ Moon Knight series, Mr. Knight is Steven’s version of the Fist of Khonshu superpowers. When Steven tries to “summon the suit” in Episode 2, he inadvertently creates the Mr. Knight personality. Mr. Knight is also the most public-facing aspect of the Moon Knight collective. In the comics, when Marc needs to address the general public, he does so as Mr. Knight.