The Defel (colloquially known as Wraiths) are barely visible beings who appear to most other species as shadows, re-enforcing the misconception that they are chameleon-like beings or "living shadows". Typically, they are employed as mercenaries or guards. They are from a large, high-gravity, seldom-visited world orbiting the ultraviolet supergiant Ka'Dedus. Af'El has no ozone layer and ultraviolet light passes freely to the surface, while other light wavelengths are blocked by the heavy gases in the planet's atmosphere. Thus, all life forms on Af'El can only see in ultraviolet light ranges, and are blind to other wavelengths of light. Often called "wraiths," their bodies absorb visible light, giving them the appearance of shadows. The Defel live in underground cities to escape Af'El's violent storms. A main export of the planet is the metal meleenium (used in durasteel), which is only known to exist on Af'El.
A noted Defel representative of the Star Wars films is Arleil Schous, seen with glowing red eyes in the Mos Eisley cantina of Star Wars Episode IV: A New Hope.
In ultraviolet light, they appear as short, muscular lupine humanoids with thick fur and unusual, three-jointed fingers. They live underground on the planet Af'El, mining the various metals in the planet's crust and outer core. Defels can see normally only in ultra-Violet light, and must wear special visors when exposed to normal wavelengths of light, or else they are effectively blind.
Read more about this topic: Amanaman