The series is narrated and led by Portuguese actress Alba Baptista in the role of Ava Silva, a quadriplegic orphan who discovers she now has supernatural powers which force her to join an ancient order of warrior nuns.

The cast also features Toya Turner, Thekla Reuten, Lorena Andrea, Kristina Tonteri-Young, Sylvia De Fanti and Tristán Ulloa.

She discovers she is now part of the ancient Order of the Cruciform Sword that has been tasked with fighting demons on Earth, and powerful forces representing both heaven and hell want to find and control her.

The website's critics consensus reads, "Though Warrior Nun's heavy handed set-up weighs it down, committed performances and excellent fight choreography may be enough for those looking for more pulp with their pulpit.

Club wrote: "The script can sometimes lean too much on mythological and religious exposition... but the actors have such good chemistry that their various pairings work, and the smartly choreographed fight scenes are well-placed."

Hadadi said that "Warrior Nun is undoubtedly familiar" influenced by the likes of Veronica Mars, Buffy the Vampire Slayer, and Alex Garland's Devs, but that when the show really clicks it becomes "its own distinct experience rather than simply a derivative facsimile of those inspirations."

[27] Nicole Drum of ComicBook.com gave the review 3 out of 5, and wrote: "Warrior Nun is a truly wild journey that manages to ask some tough questions while equally embracing its silliness, its action, and the absolute absurdity of it all.

"[29] Critic Steve Murray notes that Warrior Nun has "both potential and problems in equal measure"; supposing that the series is trying to recreate the feel of Buffy the Vampire Slayer but with less witty dialogue and creativity.

[30] Reviewing season 2, Paul Tassi of Forbes wrote: "The series has brutal, surprisingly great action, a meaningful central romance and unexpectedly biting commentary on religion.

"[31] On December 13, 2022, creator Simon Barry revealed on Twitter that Netflix would not be renewing Warrior Nun for a third season, thanking the fans for the love showed to the cast and production team.

[32] Fans responded on social media, with many seeing the decision as part of a trend of discontinuing female-led shows with queer representation, known colloquially as the trope "Cancel Your Gays".