Xabu is Ramath-lehi’s largest moon, and is also the first planet that Ramathians decided to colonize. While Xabu has a thin atmosphere and some vegetation, it is not possible for Ramathians to walk upon its surface for extended periods of time. While traversing the wilds outside of the settled colony, all inhabitants must wear assisted breathing gear. On average, 27 Ramathians die per year due to negligence regarding their oxygen monitoring.

Xabu is a place of beauty and preternatural mysticism. It is covered in sparse patches of short blue grasses that glow ever so faintly, and many lovers and friends have snuggled up together in order to gaze in wonder upon the planet Ramath-lehi.

Built in a similar style to the monolithic cavernous cities in Trilok, the majority of the Xabu colony is located underneath the surface of the moon. Originally it was the site of large mining operations, as a rare mineral called Fasgoth, known to repel water, was discovered there. While mining, the Ramathian re-enforced the mining shafts, sealed the walls, and began to implement systems that would recycle and and create breathable air. What had begun as a small mining town eventually grew into a fully fledged colony, and eventually a thriving settlement. With many colony promotions, promises of fame and wealth, the population on Xabu has flourished considerably. It is the home of more than 9.5 million Ramathians, and has been called the most desirable place to live by many public standard of living reports.

Xabu operates underneath the jurisdiction of Aurius, as it is from Aurius that many of the mining expeditions had begun.