Moon

Moon is one of the four Greater Beings that represent each individual area, the area she watches over is Prota. They are all masked in some way and are often described in ways that suggest everything is the way it is because of them and they're the ones that dilute and makes one become blank. With all the dialog suggesting the events regarding Limbo were all supposed to happen, it seems like these beings maybe have gotten bored of their realms.

Her mural is on a building in Prota that shows a sphere over her head, depicting a moon and on the rooftop of the same building, a painting of the eyes are present, possibly watching the player.

The building with the mural has a decorated interior with a poster of her and text saying "She is eternal beauty, she will heal us" and another one vaguely mentioning encasing the world in darkness alongside one with far too warped text to read.

Book
The book mentioning her first describes her as strange, mentioning she's calm through the day while she erupts at night. It then goes to describe her like an abusive mother that wants to cherish and keep [you] safe, but harms you in the process because she knows [you]'ll leave but pretends she doesn't know this at the same time and it will hurt. From mourning losing [you], she hides her emotions and blames it all on [you] in the end.

Appearance
Moon has a ceramic-white skin tone with a mask with four horns at the top, the middle ones being small with thin tips pointing inward with the outer ones are much bigger and branching out also with thin tips; the mask also has three eye holes (the third one vertical on the forehead) with her eyes, only being yellow from sclera to pupil, actually visible. She's the only one of the Greater Beings that actually has the right amount of eyes as mentioned in the book and depicted in the mural. Her hair is a light creme color that's fluffy and flows in a way that looks like clouds. Her outfit appears to be skin tight with shades of dark and light blues, the collar resembling that of a high neck Victorian lace collar with teardrop shapes coming from the rim of it with the largest one right in the middle of her chest. She's physically depicted with a slim frame while having a flat chest and narrow hips, which could be from them being genderless.