Gradak Kaz was a joined Trill Starfleet officer who joined the Maquis in the 24th century. He was the penultimate host of the Kaz symbiont. Sometime in the 2370s, Gradak's wife had been killed by the experiments of the Cardassian scientist Crell Moset after the Cardassians attacked a Maquis base on Tevlik's Moon. Gradak would carry the bitterness of that loss the rest of his life, and even into his successor host.