Siren of Hazy Maze Cave

The Siren of Hazy Maze Cave is an entity that can be found in the Hazy Maze Cave level. The entity itself is rare, though evidence of it's existence can be found in several copies. The reason for this is unknown.

Behavior
The Siren of Hazy Maze Cave's manifestations most commonly appear as small details throughout the level, potentially unnoticeable by some. These manifestations can appear as: human-like singing somewhere in the level, sudden splashing in the water, and signs mentioning the Siren or an entity similar to the Siren. There are potentially other signs that have not been documented.

There are few reports of the Siren itself appearing, making it's behaviors when it appears mysterious. The most common appearance of it is a broken model with glitched textures that disappears soon after being spotted, usually after being approached. Some people also report that they started slowly losing health after seeing the Siren.

Theorizing
Due to the strange damaging properties of the Siren of Hazy Maze Cave, some theorize that it was a scrapped boss. Others propose that the Siren is an entity created entirely by the Personalization A.I., explaining it's glitchy appearance.