Midro was a Troglyte laborer and member of the revolutionary group known as the Disrupters on the planet Ardana in 2269. When Vanna beamed down to the mines with Captain Kirk, Midro helped subdue Kirk. Vanna ordered Midro to transport Kirk's gas mask to the cloud dwellers' city so they would know that he was a hostage. (TOS: "The Cloud Minders")