As is customary with comic-book adaptations, Marvel Studios’ Moon Knight took a few liberties with its source material to best adapt it for live-action. One of the show’s biggest departures from the comics was the Mr. Knight persona. In the Marvel Universe, Mr. Knight is Marc Spector’s fourth personality, created in Jeff Lemire and Greg Smallwood’s “Moon Knight” series from 2016, which involves the hero fighting to escape the clutches of Khonshu when he attempts to take over his body.

In the show, Mr. Knight is just the costume that Steven Grant (Marc Spector’s second personality) summons when he transforms into his own version of Moon Knight. Originally, though, the Mr. Knight attire was supposed to be worn by the hero’s main personality, Marc Spector.

In Marvel Studios’ Assembled: The Making of ‘Moon Knight’ — a documentary about the creation of the series streaming on Disney+ — Moon Knight star Oscar Isaac discussed the matter, explaining that the costume went to Steven once the show’s creative team realized it would fit his personality better (from the 18:04 mark):

“Here’s an interesting little tidbit: Originally, Marc had the Mr. Knight outfit and Steven had the Moon Knight outfit. And then, as Steven became this very English bloke, [I was] like, ‘I feel like Steven’s Mr. Knight. Don’t we think that?’ And then they were like, ‘We were thinking the same thing.’ And so, then that got switched.”

The show’s co-director, Aaron Moorhead, also offered some details on the origin of the costume, stating that its in-story design came from what Steven Grant believed to be…