Like all Auri, the Umbrauri are of a comparable height to humans while typically weighing slightly less and possessing slender features. Their defining feature are their ears, reaching tall and pointing towards the heavens. For the Umbrauri, their skin ranges across shades of gray or can even be slightly purple. Their hair is a stark white color, often being grown out and tied back. Many Umbrauri dye streaks of their hair various colors, with some communities using this to denote status within a group. Like all Auri, the Umbrauri lack facial and body hair. Umbran clothing is made from some of the unique materials found within the Underlands, being either vibrantly colored or dark and foreboding. Umbran eyes, typically vibrant red in color, are often described as holding an almost troubled look that stems from their unfamiliarity with the surface world.
The Auri races possess heightened senses compared to other races, with eyes that can see in the dark and ears that can pick up even the slightest noises. Additionally, they possess lifespans that last centuries and are able to outlive virtually all other races in Asobria. In the case of the Umbrauri, they also possess a mental resistance to the psionic abilities that some of the Underlands' inhabitants possess. Additionally, the reputation their people have makes many others fearful of them, a fact that some Umbrans utilize to their advantage.