Concept sketches for the ULE! Sorry for the long post.
Most nations in the ULE prefer to create habitats or terraform planets specifically to their biological needs. This is useful, because it means that their citizens can travel to any part of the nation- habitat, planet, or moon- without suffering severe medical effects. However, this takes lots of time and resources, and as many planets can’t accommodate certain organisms even with terraforming, it ultimately limits the available space. So, the Eina jarn have taken a different approach.
The Eina jarn are a majority-Azi lana nation with a range of different territories and ways of life. Their ownership of one of only three dyson spheres in the area makes them a powerful faction. Notably, when they colonise new areas, they will genetically modify their own citizens to cope with the new environment, instead of the other way around. They have created three new varieties of Azi lana in total, all of which cannot sire children with each other or with the unmodified Xenosapiens alana, and so are usually considered entirely separate species.
X. hanwena (casually glewens) is a species of Azi lana modified to live on the moon Hanwen. Although the moon has been terraformed to hold oxygen in its atmosphere, it is half the size of Earth’s moon, and so glewens have been created for life under extremely low gravity.
To cope with this, their vascular systems, muscles, and skeletons have all been fundamentally altered, to the point where their organs would be crushed if they were to travel to the Azi lana homeplanet, Gi.
To take full advantage of the low gravity, they have also been given large membranes with which they can glide short distances. The membranes’ skin and muscle is supported by long, thin extensions of their bifurcated neural spines.
X. Larmwaa (casually engwells) is a species created to live on the super-earth Larmwa. This high-gravity planet has no oxygen in its atmosphere, and so engwells usually live in underground habitats.
To live under gravity that would easily crush others, these people have strong, light bones, sturdy muscles, and a fast, powerful heart. They also have an extra pair of legs, and their arms have been modified to easily bear weight, meaning they have a maximum of eight limbs to support themselves with.
Like humans, they can live in lower-gravity environments, but doing so for extended periods of time leads to physical changes like muscle atrophy and eventually severe medical effects.
X. Einaa (casually arjenjaals) have been modified to live inside the dyson sphere orbiting their star, Eina yerda. They are born and raised to carry out important duties, like maintenance of the dyson sphere, as well as worship and appeasement of the Eina jarn’s god- the star itself.
Arjenjaals live and work in zero-gravity. Their vascular and musculoskeletal systems, as well as their development period, have been highly modified- again, their organs would be crushed by higher gravity environments. They navigate the long, thin rooms of their home by pulling and pushing on walls and handles with their spindly limbs.
Though thick habitat walls prevent much solar radiation from reaching the arjenjaals, they are still regularly bathed in amounts that would kill a lesser organism. To cope, their DNA is hardy, easily repaired, and stored in double the amount of chromosomes. Even still, arjenjaals live tragically short lives.