Ryuji Morisaki, a former operative of the paramilitary group Arch Angel, dedicated himself to harnessing the ancient underworld Agartha’s hidden knowledge. His affiliation with the organization predates 1963, when his wife, Lisa, perished during a mission-related accident. Her death ignited a decade-long obsession to resurrect her, driving him to prioritize Agartha’s secrets over Arch Angel’s wider ambitions. Posing as a substitute teacher versed in Agarthan mythology, Morisaki strategically mentors student Asuna Watase, leveraging her trust to infiltrate the mythical realm. He impersonates Arch Angel’s commander, manipulating Asuna into activating Agartha’s gates using a clavis crystal. Yet as their journey progresses, his calculated facade fractures, revealing an unexpected paternal protectiveness toward her—a tension between exploitation and reluctant responsibility. This conflict peaks at the Gate of Life and Death, where Morisaki surrenders his right eye in a ritual to channel Lisa’s soul, nearly sacrificing Asuna as a host. His ruthless determination clashes with moments of visceral remorse, exposing the duality of his motives. The interrupted ritual forces him to confront the impossibility of overturning death’s natural law. Following the failed resurrection, Morisaki abandons the surface world, remaining in Agartha as both penance and acceptance of irreversible loss. His choice symbolizes a severance from his past life’s destructive pursuits, informed by prior combat experience in European wars that honed his tactical prowess and knowledge of Agartha’s legends. Once a grief-consumed antagonist, his arc concludes with an ambivalent redemption—a man burdened by regret, yet finding resolve in enduring the consequences of his choices, mirroring the narrative’s meditation on release and resilience.