A lore thing expanding on some Felix stuff. (Despite the fact his species and home planet are still unnamed)

His home planet it covered in a vast desert wasteland. With sandstorms periodically occurring. To work around this most cities were built underground with ports on top being enclosed in a large glass dome to prevent the sandstorms from damaging any ships.

The cities underground are sometimes built as layers to help create more space for people to live in. Certain buildings are built to be tall enough to reach the ceiling of the dug out city to prevent any cave ins.

Numerous caves are also found naturally underground. Some of them filled with a powerful pink crystal. Its energy has been used for powering a variety of sources from buildings, to vehicles. Some have even used their energy for weapons.