The Followers of Molor were a Klingon group that existed in the 23rd century.
They were associated with Molor, a figure seen by most Klingons as a tyrant, and as such might be better informed than other Klingons on the location of his ancient shrines.
A custom specific to them was to pour an extra drink and light it on fire. (DIS: "Will You Take My Hand?")
The two followers seen appeared to be operating openly, not hiding their status as followers of Molor.