Sybok

His only appearance is in the film Star Trek V: The Final Frontier, the fifth in the series of films about the continuing adventures of the crew of the USS Enterprise following on from the original series of "Star Trek".

Sybok is the son of Sarek by a Vulcan princess, and is therefore the half-brother of Spock. He has rejected the Vulcan ways of logic and the supression of emotions, and has embarked on a quest to find the true physical location of heaven.