Sklar was an Elystrian.
Sklar was one of the few surviving Elystrians after the robots had attacked their civilisation. The survivors were driven into hiding. Sklar was on his way to a meeting with some when a robot spotted him. He was saved by K9, who forced the robot to retreat. Sklar led the Fourth Doctor, Adric and K9 to the meeting, where they agreed to help free them.
Sklar showed the travellers and his people a secret route to the stronghold. He stayed on watch outside, telling the Doctor he'd warn him with the call of an Elystrian owl if there was any trouble. Once Vayla was freed and the robots deactivated, Sklar took Vayla away from the stronghold, telling the Doctor he would reinstate him as leader. (PROSE: Planet of Paradise)