Lieutenant-Commander Marx Richtor (known as "(Lieutenant-)Commander Marx" and "(Lieutenant-)Commander Richtor") was a Terran Starfleet officer, opportunist, and soldier in the mirror universe. Born into slavery under the Alliance and removed from his parents shortly after birth, he had no real name; he went by different names while growing up. He was raised in slave camps until 2355, drafted into privateer service for the Alliance, 2355-2365, returned to slavery from 2365 to 2372, and in 2372 joined the Terran rebellion. In the rebel forces, he fought with the 13th Regiment (5th Battalion) (the "Blackmarks") out of Medalloy, and eventually commanded the regiment, taking the name "Marx" after regiment custom, ascribed for kills counted by scoring weapons. Marx kept a Cardassian phaser rifle