Description
Designated "598" as Human Debris under owner Kimball, the numerical name signifies his commodified status, pronounced "Gōkyuppa" in Japanese. He pilots a customized UGY-R266C Monkey Rodi mobile suit with orange shoulders and a head horn, leveraging the Alaya-Vijnana System for superior control despite the frame's exposed structure and industrial shield.

Operating within Kimball's Dawn Horizon Corps, 598 conducts piracy against merchant vessels while aspiring to emulate Tekkadan. During an assault on a Teiwaz ship, he confronts Wistario Afam piloting the Gundam Hajiroboshi. He angrily rejects the "pirate" label, claiming his actions forge a future like Tekkadan's, a justification Wistario challenges as contradictory. Later, at Radonitsa Colony, 598 accompanies Kimball to sell stolen goods to Afam Equipment. When Wistario identifies the materials as stolen and offers reduced payment, 598 recognizes him as the Gundam pilot. Their argument halts upon activation of Wistario's Urdr-Hunt ring. 598 reveals he previously found a similar ring but gave it to Kimball, unaware of its link to vast wealth—a value Coronal Xhosa and Palstye Xhosa later confirm, creating internal conflict.

Discovering Kimball traffics Human Debris shatters 598's trust. After Palstye Xhosa shows him captives aboard Kimball's ship, 598 attempts escape and is shot in the arm by Kimball. As Dawn Horizon forces arrive, 598 and fellow Human Debris desert using Monkey Rodis. Kimball activates a killswitch to disable their suits, but 598 overrides it via the Alaya-Vijnana System. Wistario intervenes, and together they defeat Kimball and his forces. 598 then commandeers Kimball's battleship, freeing 21 captives.

Liberated, Palstye entrusts 598 with the Urdr-Hunt ring. He co-founds Foundling with escapees 368, 229, and 144, creating an organization for former Human Debris. 598 vows to win the Urdr-Hunt to establish a sanctuary for the displaced. He regards Wistario as both a rival and ideological counterpart, acknowledging their differing approaches while competing in the Urdr-Hunt.