Guardian (Klingon)
The Guardians were a group of Klingons associated with the monastery on Boreth, where the Followers of Kahless awaited the return of Kahless. Among them was Koroth. ()

In 2369, Kahless appeared to have returned to Boreth. Chancellor Gowron was skeptical, believing the Guardians had always opposed him, and this manifestation was an attempt by the guardians at finally seizing power over the Klingon Empire. 

Shortly afterwards, The Klingon claiming to be Kahless was revealed to be . ()

The time crystals present on the planet were managed by a group which called themselves the timekeepers, and described themselves as guardians, not rulers. ()

Religious titles