Xstence

Xstence (エクステンス, ekusutensu) is a secret organization of operating from the.

Overview
A few years after the end of the of the Soul Society and the dissolution of, Tetsuo Momohara (who had been a member of Xcution sometime before  had joined) decided to form a similar organization of Fullbringers, originally to train members how to defend themselves against and exorcise. However, the true intentions of the organization are currently much more dubious, and their actual purpose remains an enigma.

Like Xcution, Xstence appears to be a secret society that lacks any form of official hierarchy. However, members are assigned numbers based on the order in which they joined. As the founder of the organization, Tetsuo seems to hold more power than an average member, taking the leadership role in most cases. New members are recruited by current members who approach them and persuade them into joining. In order to keep their existence hidden from the Gotei 13 and other enemies, the process of contacting the organization is intricate and secretive.