Olivia Pierce

Dr. Olivia Pierce is a high-ranking adherent in the UAC and has taken practical control of the UAC Mars Base by causing a Hell Wave of Argent energy while releasing all of the captive demons in the Lazarus Labs, zombifying 64% of the staff and killing the rest. She is a major antagonist of the game, with characteristics similar to Dr. Malcolm Betruger of the Doom 3 series and Dr. Guerard of the Doom RPG storyline.

==Pre-release Olivia was first seen in holographic form during an id Software stream on Twitch, announcing to her "sisters and brothers" the end of their life in the present world, as she believed the demons would create a new world for them to rule.