The Priest was a Vanduul ace pilot. He was recreated in the Vanduul Swarm Simulation in Arena Commander as an enemy.
"The only thing that eclipses the Priest's skill and finesse in the cockpit is its ferocity on the ground. During the Siege of Crion, Priest was not only instrumental in fracturing the defensive line in space, but also landed on the surface to seize a military stronghold. When it was in a Scythe, UEE pilots quickly learned to fear its brutal, close-range fighting style. What ultimately earned the Vanduul pilot its handle were the Naval officers who claimed that it would get close enough to hear final confession."
Arena Commander Manual