Netflix's Warrior Nun series opens with the death of Sister Shannon, the current bearer of the Halo and leader of the Order of the Cruciform Sword, the demon-fighting sect of nuns trained in combat. However, the Halo-bearer has super-powers: strength, healing, energy blasts, and the ability to phase through solid objects. She's pretty much invulnerable to conventional weapons. Her only weakness is Divinium, a strange metal whose existence dates back to the first Warrior Nun, Areala.
In the comic, Sister Shannon Masters is the main character of the series. The series changed her ridiculous outfit of nun's habit and skimpy loincloth into armor, giving her a resemblance to Joan of Arc. The Sister Shannon from the comics has a cybernetic arm, an adopted son who's a comic book fan, and a crush on one of the priests. Dropping all that, Netflix chose to create a new character, Ava, to be the Warrior Nun, using Shannon as a key plot device.
The impetus for the warrior nuns and their advisor, Father Vincent, in the first half of the television series is to solve a murder mystery: who killed Sister Shannon, and why? The clues that Sister Shannon provides after her death provide some guidance, but a vision that Ava has of Shannon points her in a different direction. For fans of the comic, the TV version of Shannon serves as an anchor, as one wonders if she'll take a more prominent role.
