Quilge Opie holds the rank of executive hunting captain in the Vandenreich's first Jagdarmee and bears the Sternritter designation "J" for "The Jail". His distinctive appearance includes a mostly shaved head with a tuft of black hair on top, round spectacles housing a two-way radio for direct communication with Vandenreich headquarters, and a modified Vandenreich uniform: white trousers, black boots, a white top secured by a black belt with a decorative buckle, a short white cape, and a white hat featuring a black peak. He commands with absolute authority, demanding complete submission from captives and reacting barbarously to any who misunderstand him. Quilge harshly criticizes subordinates for perceived delays or incompetence and shows no tolerance for resistance. His loyalty to Emperor Yhwach is absolute, compelling him to stake his life on the Emperor's orders. Quilge exhibits notable arrogance, openly deriding Sosuke Aizen's choice of Espada subordinates as inferior. During the Thousand-Year Blood War, Quilge commands the Jagdarmee camp in Hueco Mundo, instituting a brutal selection process: captured Arrancar must kneel and lick his boots to survive, while those who resist face execution. He swiftly defeats attackers Loly Aivirrne, Menoly Mallia, and Harribel's Fracciónes—Emilou Apacci, Franceska Mila Rose, and Cyan Sung-Sun—though he offers the Fracciónes service under the Vandenreich. When Ichigo Kurosaki arrives, Quilge identifies him as a Quincy and engages him in combat, initially matching Ichigo's Shikai state. Acting on a direct command from Yhwach, Quilge activates Quincy: Vollständig using a Sanrei Glove, transforming into an angelic form with enhanced capabilities. He declares this superior to the outdated Letzt Stil Ichigo knows, representing the Quincy's true potential. In battle, he demonstrates Reishi absorption, draining energy from the environment and even Orihime Inoue's Santen Kesshun barrier. After Ayon breaks his neck, Quilge unexpectedly revives using Blut Vene's defensive power, snaps his neck back into place, and employs Sklaverei to dismantle Ayon into Reishi, grafting its components onto himself for increased strength. He attempts to absorb Yasutora Sado and Orihime Inoue while also trying—and failing—to steal Ichigo's Bankai with a specialized medallion. Severely wounded by Kisuke Urahara's surprise attack, Quilge later uses Ransōtengai to manipulate his body and activate "The Jail", trapping Ichigo within a spherical barrier to prevent his travel to Soul Society. As he prepares to execute the remaining combatants, Grimmjow Jeagerjaquez bisects him vertically. His equipment includes a standard Jagdarmee spear capable of piercing Arrancar Hierro, a five-pointed Quincy cross on his belt, the communication earpiece within his glasses, the Sanrei Glove for Vollständig activation, and the Bankai-stealing medallion bearing the Vandenreich insignia. Quilge's abilities encompass expert swordsmanship, high spiritual power, Reishi manipulation, and mastery of Quincy techniques: Blut Vene for defensive reinforcement via Reishi in blood vessels; Vollständig for amplified combat prowess, flight, and Reishi control; Sklaverei for forcibly decomposing spiritual beings into absorbable Reishi; and Ransōtengai for movement despite severe injury through Reishi thread manipulation.