This executioner was a masked man who, at Spock's pon farr ceremonies in 2267, was ordered to kill "anyone showing cowardice" during the kal-if-fee. In this case, it was James T. Kirk or Spock who would be fighting. After T'Pau explained the rules, McCoy misunderstood and thought Spock would have to fight the executioner. Later, when McCoy spoke out of turn again, the executioner positioned the huge blade at his throat, as T'Pau noted, "I can forgive such a display only once." (TOS: "Amok Time")
The Vulcan executioner was played by background actor Russ Peek.
Both councilors were played by background performers who received no credit for their appearance.
These two councilors are not the same person, as in one scene, they are sitting next to each other. It should also be noted the disproportionate number of Vulcans on the Federation Council, which may mean not all of them were actually councilors.
He recognized Spock as being the son of Sarek, and noted that he had heard of the young Vulcan and his Human tendency to perform practical jokes. Spock confessed that he had done one, once, two years prior, but professed to the healer that he would not call him out unless a life was in danger.
After gathering his medicines, the healer transported himself and Spock to the site where I-Chaya laid, via a desert flyer, where he attempted to heal the sehlat's injuries. Unfortunately, the time that had elapsed since I-Chaya was injured had been too long, and he informed Spock that no antidote known could save his life. He then informed Spock that the best he could do for the sehlat was prolong its life. However, he noted that it would be in pain, then added that he could also, if necessary, release him from his pain, but the decision was ultimately young Spock's to make.
After Spock finally decided the right thing to do was to allow I-Chaya to die with dignity, the healer gave the sehlat a shot from his hypospray to put the beast out of its pain. (TAS: "Yesteryear")
The voice of the Vulcan healer was provided by James Doohan.
The novelization of "Yesteryear" (in Star Trek Log 1) describes the healer as a "tall, middle-aged Vulcan" and refers to his toga-like night clothing as "red with garish blue stripes."
He is one of the few Vulcans who have been known to grow a beard, as opposed to the popular trend in the mirror universe.
This master guided Vulcans who underwent the rituals to attain kolinahr. She presented Spock with the symbol of pure logic after he underwent the rituals in the early 2270s. However, Spock refused the symbol after his Human side was touched by strong emotions from V'ger. The master melded with Spock and told him he would need to look elsewhere for the answers he sought. (Star Trek: The Motion Picture)
The Vulcan High master was played by actress Edna Glover.
In the 2270s, a young and rebellious Tuvok was sent to a Vulcan master to learn to control his emotions. He often spoke in riddles, which annoyed Tuvok.
Tuvok told the master that he was sent there against his will, for refusing to deny himself passion and feelings he was born with. The master said that he would teach control to Tuvok, who was in love with a schoolmate, which was one of the reasons his parents sent him to the master. The master taught him that love was the most dangerous of emotions, leading to jealousy, grief, and rage. It was through his teachings that Tuvok embraced logic. (VOY: "Gravity")
From what we know of the Vulcan government, it is curious that they would have a princess unless it was a solely ceremonial or religious title.
Sybok's backstory and Sarek's marriage to the Vulcan princess is considered apocryphal by many sources and individuals, including Gene Roddenberry. The episode "Sarek" also contradicts this by stating that Sarek's first wife (obviously meant to be Amanda) was from Earth. Note, however, that although Spock states Sybok's mother was a Vulcan princess, he never said that she and Sarek were ever married.
The film's novelization gives her name as T'Rea (β), while the novel Sarek states that she divorced him to pursue kolinahr eventually becoming a High Master of Gol (β).
This Space Central contact answered the hails of the Enterprise and granted the starship permission for standard orbit at Vulcan in 2267. He also welcomed the vessel, asked if Spock was aboard and instructed to stand by the ship's central viewer. (TOS: "Amok Time")