The Anx were a reptilian sentient species with a distinctive appearance that had evolved in response to the high gravity of their homeworld, the Outer Rim planet Gravlex Med. Bipedal in nature, the species had dense musculature, a naturally stooped and hunched posture, and tails that provided a heavy balanced all in response to the gravity. However, despite these restrictions, the Anx still loomed over most other sentient species and could often reach up to four meters in height, also displaying notable strength. The species used their height to easily harvest from the chiliox trees native to their homeworld.

Other adaptations of the Anx included the natural low-frequency echo of their voices, which had developed to allow communication across vast distances during a time in their history when the species lived in cave systems underground. In the right conditions, an Anx could make itself heard from kilometers away whether in an underground cave system or in the open air. Their large headcrests also developed to aid in communication, changing color to reflect their mood. This was a quirk of the herd-based social structure of communal living used by the Anx on Gravlex Med. Force-sensitivity was uncommon, but not unheard of, among the Anx.

The natural herd structure of the Anx species was eventually extended into a full clan-based society with the internal structure of the clans being based around both extended family bonds and political alliances. Even long after this structure first developed, Anx tended to show fierce devotion to their family and other clan members, and could easily decipher the complex ties between the different group as the system had developed long before the Anx encountered any other sentient species.

The Anx were especially naturally curious due to their confidence in being able to use their large size and strength to handle most threats that they encountered. They also possessed a curious ability to intuitively identify the weak spots within the anatomy of other species, giving them further advantage against new obstacles they encountered. The Anx developed their own deep rumbling language that was impossible for any other species to speak, but later also learned to speak Galactic Basic.