Merg Vol

Merg Vol was a Sangheili commander and the leader of a Rogue Covenant Fleet. Vol was the tactician behind the Battle of Draetheus V, decimating the UNSC Navy in orbit before landing on X50 and activating the Forerunner relic there. The artifact began breaking the planet apart, leading to a full UNSC evacuation. Vol was eventually killed by SPARTAN Palmer at the foot of the artifact, and his fleet was destroyed.

Trivia

 * Merg Vol makes use of multiple Armor Abilities and carries four weapons at once, making him the most heavily outfitted enemy in the game.
 * It is stated by Roland that Vol considered himself a successor to the High Prophets, and that he believed himself to be the sole individual with the right to use X50's power.