The Backrooms is a popular creepypasta that depicts an infinite and labyrinthine series of interconnected rooms that exist outside of our reality. The concept originated on the imageboard 4chan, and has since been expanded upon by various internet communities, resulting in a rich and complex mythology surrounding the Backrooms.

In the Backrooms, the entities that populate its many levels are varied and often unpredictable, ranging from benign and harmless to dangerous and deadly. At Level 0, however, the entities that are encountered are generally considered to be some of the least threatening within the Backrooms, although this does not mean they are entirely safe.
Level 0 of the Backrooms is described as a series of generic, yellow-tinted rooms that are typically used for storage or other utilitarian purposes. These rooms are devoid of any significant features, aside from the occasional piece of furniture or debris left behind by previous explorers. The lighting is dim and flickering, casting everything in an eerie and unsettling glow.
The entities encountered on Level 0 are often referred to as “Noise Makers,” due to their tendency to emit a loud, constant hum or static-like noise. These entities are generally considered to be harmless, as they do not appear to possess any form of intelligence or intentionality. They are simply wandering around the level, emitting their noise and occasionally bumping into walls or other objects.
While Noise Makers may not pose an immediate threat to explorers, they can still be unsettling and disorienting to encounter. The constant noise they emit can make it difficult to hear other sounds or communicate with other explorers, which can be a serious hindrance in the deeper levels of the Backrooms. Additionally, the presence of Noise Makers can be an indicator that one is getting closer to more dangerous entities, as the deeper levels of the Backrooms are generally considered to be more hazardous.
In addition to Noise Makers, Level 0 is also home to a variety of other entities, such as “M.E.G.” (which stands for “Mobile Electrical Generator”) and “Hounds.” M.E.G. entities are described as large, boxy machines that roam the level, emitting a low-level electrical hum. These machines appear to be completely passive and do not react to the presence of explorers. Hounds, on the other hand, are described as small, dog-like creatures that scurry around the level, emitting a high-pitched whine. While Hounds are generally considered to be harmless, they can be difficult to catch and can move quickly, making them a potential annoyance to explorers.
Another entity that has been reported on Level 0 is the “Watcher.” The Watcher is a humanoid figure that is often seen standing at the end of long, dark hallways. It appears to be completely motionless and does not react to the presence of explorers. While the Watcher is generally considered to be harmless, its unsettling presence can be a source of unease for those exploring the level.
Overall, the entities that populate Level 0 of the Backrooms are generally considered to be among the least dangerous within the Backrooms. However, it is important to remember that the Backrooms is an unpredictable and ever-changing environment, and new entities and hazards may appear at any time. As such, it is always important to approach exploration of the Backrooms with caution and to be prepared for any eventuality.