Eurrsk Thri'ag, nicknamed Grinder, was a male Bothan slicer and pilot on the verge of washing out from the New Republic armed forces during the Galactic Civil War. In 7 ABY, Thri'ag agreed to transfer to a new squadron that Commander Wedge Antilles was forming. After a series of interviews and flight simulations, he was among the ten pilots selected to be part of the starfighter commando group Wraith Squadron. Thri'ag served as the squadron's code slicer and unofficial prankster.