Highly intelligent and vindictive towards the Brotherhood of Steel, Attis took his group into hiding, searching for clues regarding the history of the FEV virus. Throughout years, he and his army led a guerilla war against the Brotherhood, eventually forcing them to start a crusade in order to annihilate the remaining super mutant threat.Attis is one of the few super mutants with both high intelligence and great physical strength. He is tall, strong and quite athletic even a for super mutant. In addition, he is very fast and proficient with all kinds of weapons.
Attis is a West Coast-type Super Mutant, one of the Master's soldiers, and after the death of the Master he becomes the general of a faction which tries to continue the Master's work, rebuild the army, and dominate Southern California once again.