Castin Donn was a Human male from Coruscant who was a member of the New Republic commando group Wraith Squadron. In 7.5 ABY, Donn was brought in to replace the Wraiths' former slicer, Eurrsk Thri'ag, during the New Republic's campaign against Warlord Zsinj. When the Wraiths began an undercover operation and pretended to be pirates preying on the Halmad system, Donn participated in a number of raids, and his slicing skills proved instrumental to some of their successes. The Wraiths' pirate activities were later noticed by Zsinj, and they were invited aboard his flagship, the Executor-class Star Dreadnought Iron Fist, to parley. Donn proposed a plan to his commander, Wedge Antilles, that would allow them to track Zsinj's location. Antilles deemed the plan risky but doable and assured Donn it