Mannequins

Mannequins were originally the robotic security and distribution system of the Department Store before something in the system went wrong, causing them to go berserk and mutate into animal-like bio-mechanical monsters. They were designed to be self-maintaining and thus were given biological characteristics, giving them the ability to eat, reproduce and evolve. Not only did they act as security for the Department Store, but they also acted as its clerks as they had the ability to produce store merchandise from their body. After going berserk, their behavior was no different than an animal's and were thus very territorial and possessed both herbivorous and carnivorous tendencies.