Cheeron was an Aquan male, native to the planet Argo. He was one of three Senior Tribunes who sat on the Ruling Tribunal of the Aquans.

When James T. Kirk and Spock stood in front of the Ruling Tribunal in 2269, Cheeron questioned why the Junior Tribune always wished to change the ancient records. (TAS: "The Ambergris Element")

Voice by James Doohan. His name was not spoken on screen, but rather comes from the episode's first draft script.