In the mirror universe, Enton G'yermo was a tactical ensign on the bridge of the ISS Arcadia. He was descended from the Terran subculture of the Italians, known to have a nose for wine and an innate talent for winery. His father told stories of their ancestors, who reportedly went by the surname Guillermo, in ancient Italy before Earth's decimation by the Alliance. His father described them as "masters of the art".