Karlo	human	male	POTA: Resistance		fellow slave with Sarai in Ape City
Karubi	human	male	POTA (2001), POTA: Force	Kristofferson, Kris	father of Daena [POTA (2001)], husband to Sarai (POTA: Force)
Kerchak			Return to the POTA		referred to in mild ape oath, "By the claws of Kerchak"; name originated in Tarzan stories
Kestos	gorilla	male	POTA: Force		soldier, friend of Maga
Kira, Doctor	chimpanzee	female	POTA TV Ep. 7 "The Surgeon"	Scott, Jacqueline	surgeon; ex-fiancée of Galen; operates on Virdon to save his life
Krador	human	male	Return to the POTA Ep. 5 "The Unearthly Prophecy"		ruler of the Underdwellers
Kraik	human	male	POTA TV Ep. 5 “The Legacy”	Haley, Jackie Earle	inhabitant of ruined city of Oakland, California, Forbidden Zone; orphan, betrays Virdon to gorilla captain; becomes foster child to Arn and accompanies her to live at Durlin’s farm
Krull	gorilla	male	POTA (2001), POTA: Force, POTA: Resistance	Tagawa, Cary-Hiroyuki	inhabitant of ape city of Derkein; silverback, former general of ape army, current manservant to Sen. Sandar
Kygoor	gorilla	male	Return to the POTA Ep. 6 "Terror On Ice Mountain"		gargantuan 'ice ape', god and protector of his mountain