Bacteria, also known as the Howler, Loud Wireman, or Lifeform, is a hostile humanoid entity with a strange skeletal, wire-like body. It is an aggressive predator that actively searches for humans and becomes highly persistent once it detects them. Bacteria can move quickly and is capable of pursuing its targets for extended periods, making encounters extremely dangerous. Its body is composed of countless thin, tangled lines of an unidentified substance, forming a vaguely humanoid skeletal structure rather than conventional flesh and bones. The entire creature is predominantly matte black, deep black, and dark charcoal, with a rough, dingy surface. Its torso is extremely thin and elongated, while its limbs are unusually long and narrow. Its arms extend downward toward the ground and end in thin, elongated fingers. The legs are similarly skeletal and wiry, with no clearly defined feet. Numerous cable-like strands twist around its torso and limbs, making its body resemble a tangled mass of black wires shaped into a humanoid. Its head is noticeably chunky and rounded, contrasting with the extremely thin body. The head is primarily dark black and charcoal, with an irregular, rough texture and several prominent holes or openings across its surface. These openings create an eerie, hollow appearance. It lacks clearly visible conventional facial features such as normal eyes, a nose, or ears, although it possesses extremely effective senses. Bacteria can detect movement and sound and is capable of noticing people from considerable distances. When it detects a target, it becomes aggressive and begins pursuing them. Its movement is accompanied by disturbing noises, including loud distorted howls, screams, and other unnatural vocalizations. Some interpretations also portray it mimicking human-like sounds, potentially using them to lure people closer.