The Warrior Nun (2020) television series is based on the Warrior Nun Areala comic book series created by American artist & writer Ben Dunn & published from 1994.

The current in the series, Warrior Nun: Lazarus, was released in 2006.

The comic books follow Sister Shannon Masters, a member of the Order of the Cruciform Sword & modern-day warrior nun fighting demons and evil forces. The Netflix show adapted this concept rather than a specific book plot.

Shannon Masters was born around 1959 & orphaned at the age of 4. She was first left on the steps of a convent & later adopted by a family in Japan.

Shannon lived in Japan with her adoptive family until she was 11, after which she was chosen for the Silver Cross Program & raised to be a Warrior Nun in Saint Thomas Academy, New York. This experience was like being in a boarding school.