Kudak'Etan was a Jem'Hadar soldier during the Dominion War, one of the first Jem'Hadar to be bred in the Alpha Quadrant. As an "Alpha", his genetic profile was considered superior to the "Gammas" and he replaced the Gamma Ixtana'Rax as the First under the Vorta Gelnon. His first mission, an attack on the Federation starship USS Defiant in 2374, was successful. Kudak'Etan and a detachment of Jem'Hadar troops remained on the captured Defiant to pilot it back to Dominion territory.
Against Ixtana'Rax's advice, Kudak'Etan allowed Captain Benjamin Sisko and a few of his officers access to the ship systems to repair the damaged warp drive. They were able to delay the repairs long enough to regain system control, with some help from the runabout USS Rubicon (which had been miniaturized by a spatial anomaly). Kudak'Etan was killed by Lieutenant Commander Worf when they retook engineering. (DS9: "One Little Ship")