Gwarz

In the mirror universe, Gwarz was a bald $𝜇$ soldier in the Klingon-Cardassian Alliance. In 2371, he was assigned to $𝜇$, along with Khone. Gwarz and Khone bullied $𝜇$ after the Terran returned from New T'Karath. After Picard left his runabout, the Stargazer, to meet with Gul $𝜇$, Gwarz and Khone boarded the ship. They severely beat $𝜇$, the boy who was watching over the Stargazer, and plundered, vandalized, and destroyed Picard's possessions, including the last surviving bottle of wine from $𝜇$. (TNG novel: The Worst of Both Worlds)