In Star Trek Discovery 1x11 "The Wolf Inside", we meet the Mirror Universe version of Sarek, who is called "The Prophet". Apparently he has this title because he can mind meld with people to discover their true intentions.
But the non-Terran alliance appears to consist of the entire Vulcan race, and there isn't any evidence that a select few Vulcans in the Mirror Universe can mind meld; Mirror Spock and Mirror T'Pol could do it on their shows. So why single out Sarek, or any other Vulcan, as "The Prophet"?
Of course Mirror Sarek has a goatee…