Commander Prorok is a high ranking officer in Zarkon's military force. He once tried to capture Voltron alone, having little faith in Haggar's magic, but his attempt at glory only resulted in failure. He is later framed by Thace for treason and sabotage and transformed into a Robobeast. He was killed when Ulaz piloted his ship into the robeast's jaws and opened a space pocket within, causing them both to implode.
Gallery
Negotiating with the scum of the universe.
From Commander to hoover. Man, when Zarkon demotes someone he is brutal.
Why have a simulated jaw at all? Just adds complexity without function in this case...
Robeast Prorok imploding after Ulaz dove into his mouth and activated the gravity generator.