Jinba appears as a mysterious old man dwelling in the desert wasteland, concealing his true identity as King Abmis, exiled ruler of Kukurit – a future society born from Kujukuri City displaced 10,000 years forward. Forced to flee his kingdom during political turmoil, Abmis entrusted his infant daughter to the commoner Tachi family for protection. She grew up as Emiya. Adopting the alias Jinba, the exiled king retreated into seclusion within a desert cave, dedicating years to mastering combat techniques and survival skills, becoming a reclusive sensei.

Jinba's solitude ends when he rescues Bunretsu Tanbara, a young boy from the present who stowed away in a time machine, from mutant monsters in the desolate future. Taking Bunretsu to his cave refuge, Jinba accepts the boy as his acolyte, offering shelter and guidance. Their dynamic shifts again when Emiya arrives, driven by vengeance after witnessing the murder of her fiancé, Taro, by the oppressive Governor Pirar of Guroman. Recognizing her fierce determination, Jinba agrees to train her rigorously in swordsmanship and combat tactics, transforming her into a formidable warrior.

The climax of Emiya's training pits her against a fire-breathing dragon with petrifying abilities. During this trial, Jinba sustains mortal wounds. With his dying breath, he reveals his true identity as King Abmis and discloses that Emiya is his daughter, Princess Prime Rose, entrusted to Jacques Tachi during his exile. This revelation confirms Emiya's royal lineage and her rightful claim to lead Kukurit. Jinba's death becomes the catalyst for Emiya to fully embrace her identity as Prime Rose, leading the resistance against Guroman's tyranny and the demonic entity manipulating the conflict.