The Cheetah People had the heads of cheetahs and thick, spotted fur. They also have distinctive golden eyes, retractable claws and sharp fangs. They had an excellent sense of smell which they can use to track their prey.
Some of the Cheetah People, like Karra, the Cheetah Person with whom Ace would develop a bond, began as Near-Humans, gradually acquiring cheetah characteristics. Their eyes change to golden feline slits and they develop fangs. Of the Cheetah People seen, only Karra spoke, but she did so without any difficulty. At the moment of her death, Karra lost all her cheetah characteritics.
The Cheetah People generally wore leather and trophies from their hunts, using horses as mounts. They had the ability to teleport from planet to planet, but they can only bring back prey to their homeworld. Similarly, they must have a link to a world, inthe form of an inhabitant of that world to return there.
Cheetah People are a dangerous, but playful, race. They will only go after food which is moving and will attempt to make hunts more interesting. By Human standards they have a vicious way of life and will fight each other over spoils or kill helpless Humans without provocation. They do seem to have some sort of respect for their own dead and will return to a world to come back for their fallen.