Unidentified Prophet (The Babysitter)

The Unidentified Prophet was a San 'Shyuum of the Covenant Empire responsible for supply routes in an unknown sector of the Milky Way Galaxy.

Death
Prior to a visit to a world under his control, a Human team, comprised of three Orbital Drop Shock Troopers led by SPARTAN Cal-141, managed to slip past Covenant Army patrols and take up an overwatch position above a landing zone in a staging area.

Just before the SPARTAN was able to shoot the Prophet after his arrival in a Type-52 Phantom, a Jiralhanae Chieftain sneaked up on the team and injured the veteran sniper. During which, Cal ordered Marine O'Brian to take the shot. After sighting in on the unsuspecting Prophet, O'Brian managed to kill the alien from a distance of two miles.

His death allowed for the United Nations Space Command to regroup and exploit the new weakness in the Covenant supply chain.

Trivia

 * Although not a High Prophet (such as Truth, Mercy or Regret), this San 'Shyuum has a Gravity Throne. It is unknown why he would have this instead of a Gravity Belt.