Organization in Caliphas, and the largest chapel to Pharasma in the nation of Ustalav. Winter Klaczka was a sister there before being deputized into the Royal Accusers. It is an incredibly high-powered place to be, both spiritually and politically.
In Chapter 39, the party met a second person from the Cathedral, a companion of Winter’s introduced as Annie.
First Reference: Chapter 10
Other Notable References: Chapter 39