The Moon
Aia’s cloud-shrouded Moon is a strange & unpleasant landscape for anything not born there, even not accounting for the geography, flora, or fauna.
Perpetual Cloudy Night
Half the Moon is blanketed in a nearly perpetual night, as the Moon is situated further from Aia than the Sun is, and therefore never sees light on the side facing away from Aia. Even if you’re not on the dark side of the Moon, the entire Moon has a nearly-constant cloud cover that rarely dissipates, granting only very brief glimpses of direct sunlight as dusty godrays that dance across the warped horizon wherever the cloud cover occasionally breaks.
Horizon Blues
Because the Moon is only ~300 miles in diameter, there is an extremely powerful & omnipresent curvature visible in all directions. This creates a claustrophobic horizon effect; you can only see around half a mile into the distance on flat terrain, around 40 times shorter than on Aia’s surface (where on a clear day, one can see for maybe 20 miles). Everywhere you stand, it always feels like you’re standing on a very gentle hill, even if the ground is level. For similar reasons, flat maps are almost totally useless beyond an extremely local scale, because distortions grow so rapidly.
Only One Weather Report
The entire Moon essentially shares a single weather system. When it rains on the Moon, it rains everywhere. The ~280,000 square miles of terrain pegs the Moon at around the size of Texas, or France plus the U.K. combined.
Can’t Tell Time
There is no consistent method of keeping time. Without the Sun orbiting in a regular manner & with the omnipresent cloud cover, the entire surface is perpetually dark, with only occasional breaks in the sky on the bright side of the moon. Any reference to “days” is purely for convenience’s sake.