Tleilaxu Master is a rank in the social system of the Bene Tleilax. Masters are rated above Face Dancers, and often use Face Dancer mules to do their bidding. They are known to use a specialized humming or whistling language to control Face Dancers and gholas.
The nine Masheikhs who governed Bene Tleilax through the Ruling Council were chosen from the Master ranks.
At times, if Face Dancers lived enough serial lives as gholas, they were elevated to Master status. Scytale was one example of this.