Lieutenant Themon was a 23rd century Andorian woman, a member of Starfleet who served as crewmember of the Federation starship USS Enterprise under the command of Rear Admiral James T. Kirk in the 2270s. Themon's specialty was as a sociologist. While she was serving aboard the USS Enterprise, she had a romantic relationship with Pavel Chekov. (TOS comic: "There's No Space Like Gnomes'!")