A rare sentient species, Theelin had three horns on either side of their face, hooved feet, brightly colored hair, and spotted, speckled skin. They were able to interbreed with humans to create a hybrid.

Theelin often had artistic personalities, and many chose to become artists or performers, while a “Miss Theelin” beauty pageant was available for entry by female members of the species. A colonial species, they had migrated and adapted to dominate many worlds.