Greg Mueller

right Greg was an unethical Umbrella researcher assigned to conduct various experiments at Raccoon University. Greg created a powerful creature similar in size and strength to the Tyrant model, naming the creature "Thanatos". However, when Umbrella begins to massproduce the Tyrant, Greg becomes furious, believing that this would take away from the individuality and unique-ness of his subject. Like many Umbrella researchers, Greg viewed his creations as works of art, and not massproduced weapons as the Umbrella Corporation intended, and refuses to help them any further. To further spite Umbrella, Greg helped Dr. Peter Jenkins create a cure for the T-Virus, Umbrella's most prized viral weapon. Due to his rebellion, Greg was marked for death by Umbrella, who sent a U.B.C.S. team to assassinate him and retrieve a blood sample from Thanatos. Anticipating this, Greg intended to have Thanatos eliminate his would-be assassins. Thanatos largely achieves this, quickly decimating the squad, although one member, Nicholai, escapes and ultimately manages to kill Greg with a sniper rifle.