Aar'aa represented a sentient reptilian species that originated from the planet known as Aar.
These beings possessed the ability to alter the pigmentation of their skin, enabling them to effectively blend into their environment. Characterized by their imposing height and robust musculature, they exhibited features such as textured, scale-covered skin, sharp claws, a slender ridge along their back, and sizable facial structures distinguished by prominent brow ridges that cast a shadow over their small, luminous eyes. As cold-blooded beings, extreme cold caused them to become slow and lethargic. The coloration of their eyes was a distinctive reddish-orange hue.
The Aar'aa frequently maintained connections with Hutt criminal organizations. Numerous Aar'aa individuals functioned as security personnel at the t'landa Til "religious retreat" situated on Ylesia, which was managed by the Besadii kajidic. An Aar'aa, under the employment of Jabba, carried out the assassination of Pohtarza.
Reportedly, they found the movements of mouse droids appealing, as it closely resembled the behavior of creatures they would hunt.