The chairman of the ruling party on the Nazi-styled planet Ekos, outwardly a senior figure of the regime but in secret a member of the underground working against it.
Eneg is the Party Chairman on Ekos, a world whose society the Federation historian John Gill reshaped on the model of Nazi Germany. He appears in the second-season Original Series episode Patterns of Force, played by Patrick Horgan. His name is Gene spelled backwards, a nod to series creator Gene Roddenberry.
When Kirk and Spock are caught and flogged by the security police, Eneg intervenes in the interrogation and has them locked up rather than executed, which allows them to escape. The underground they then join regards him as one of the most feared men of the regime.
At the climax Eneg recognises the disguised offworlders and deliberately lets them pass. After Deputy Führer Melakon is shot, he and the resistance heroine Daras take charge of ending the war against Zeon.