The Caretakers
The Caretakers, who are female Lanai, practiced a religious system centered around the ideal of balanced serenity. While they had been the keepers of the Temple Island as well as the First Jedi Temple for countless years, the Caretakers did not follow the ways of the Jedi. Nevertheless, their belief system contained counterparts to both the light side and the dark side of the Force, which they saw reflected in the changing atmospheric conditions of the planet Ahch-To.
The Caretakers' religious beliefs were initially referenced within Star Wars: The Last Jedi: The Visual Dictionary (2017), as penned by Pablo Hidalgo.