Ultra is the highest combat rank a Grunt can achieve. They hardly cower even once their leader is dead and are the first to attack the player during the game. They also are smarter, and unlike other Grunts they can use the overcharge feature of the Plasma Pistol, and also sometimes use Plasma rifles. In Halo: Reach Ultras wear helmets, meaning that unlike other types of grunts it actually requires two head-shots from a DMR or Magnum to kill one. They have gray, white, or lilac armour, and appear in the Phantom set. Ultra Grunts sometimes drive Ghosts however this is generally done by a Grunt of the Heavy class.
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