Shari Tcha'kla

The Shari Tcha'kla was a group of 30 Vulcans whose raison d'être was to monitor members of the Twelve Families to ensure that they hewed to a Surakian ideal of thought and behavior. Legends are unclear as to when they were founded -- either by Surak or after his death.

Three months before the Enterprise was to conclude its first five-year mission under James T. Kirk, Spock met Sudek, a member of the Shari Tcha'kla who convinced him that undertaking the Kolinahr would be beneficial to both Spock's relationship with Kirk, and to all Vulcan. (Absolute Horizon)