Jinia operates as a rival slave-trader to Guruma in a post-apocalyptic wasteland, ruthlessly leveraging gladiatorial combat to advance his interests. He pits his enslaved champion, "Bear Killer" Gadesu, against Guruma’s warrior, "Wolf Killer" Kenshiro, in a staged duel to assert dominance. Gadesu’s defeat undermines Jinia’s standing, weakening his position. During the subsequent cataclysm that obliterates Gesso City in a catastrophic explosion, Jinia is heavily implied to perish amid the chaos, his fate intertwined with the city’s ruin.