Humanoid inahbitants of the planet Capella IV. Relatively primitive by Federation technological standards, the Capellans had a strong tribal government and a strict set of warrior mores. They considered combat more interesting than love, and did not believe in medicine, feeling that the weak should die.

Their tribal government was led by a ruler called a teer, who headed the Ten Tribes of Capella. A significant power struggle in 2267 resulted in the death of High Teer Akaar at the hand of rival Maab, with the support of Klingon operatives who sought to influence the outcome of topaline negotiations with the Federation. Maab was later killed and leadership of the Ten Tribes was assumed by Leonard James Akaar, infant son of the late Teer Akaar. While the child was growing, his mother, Eleen, ruled the Ten Tribes as Regent.