The creature seems to "come to life" from wires and Hay Bacillus resembling mold around the Backrooms. The entity presumably killed which is theorized to be Nicolas Bolton, evidenced by the severe tissue damage and mutated bacteria inside his body. It most likely killed many other people who fell into the Backrooms too. The creature creates distorted screeching and screaming and doesn't talk, and runs at a speed faster than a regular human.