The Rilnar are a short-bodied alien race was native to the planet Ril. These beings are characterized by their long, thick bodies and short limbs. They waddled when they walked, and were ungainly to look upon. Their heads were dominated by a long, thin plate of body which extended back from the skull, and their faces were flat. Two small eyes sat over a wide mouth which was filled with short, sharp teeth. The Rilnar are known for their quick-change metabolism, which helped them escape from sagcatchers on their homeworld. Individuals were bred for their color variation, another way they avoided becoming prey. As a people, the Rilnar had a strong warrior tradition.