In the mirror universe, Kozak was a Klingon male in the service of the Klingon-Cardassian Alliance who lived during the 24th century. In the 2360s, he served as an slave overseer in the mining colony of Korvat, which was under the command of Gul Zarale. For much of Kozak's tenure, productivity in his section was insufficient to meet the requirements of the colony. This was in part attributable to the ruthless manner in which he undertook in duties, even when compared to other overseers. In response to his having orders thirty slaves to be put to death during a single two month period in 2361, at least a dozen of his slaves entered into a plot to assassinate him. A Terran slave named Keiko Ishikawa had her lover, the Cardassian overseer Glinn Broca, arrange for her to have a meeting with Za