Glass hails from the Spirit People, a race inhabiting a realm imperiled by the Waves of Calamity—cataclysmic events that merge dimensions, dooming the weaker world. As the Fan Hero wielding the sacred Vassal Fan, she is charged with safeguarding her homeland. This duty fuels her initial aggression, driving her to confront other worlds’ Cardinal Heroes in a desperate bid to stall her own world’s erasure. Trained in an elite martial arts school, Glass faced scorn due to her enigmatic origins. Denied entry to trials for inheriting the Vassal Fan, she defied expectations when the weapon selected her after deeming all other disciples unworthy. This sparked bitter resentment among her peers, who severed ties. Later, she allied with Kizuna Kazayama, the Hunting Hero summoned to her realm, to overthrow the Demon Dragon Emperor. Their victory forged an enduring bond, leading Glass to reside in Kizuna’s adopted world. When Kizuna vanished into the Infinite Labyrinth, Glass’s world teetered near collapse. Scouring ancient records, she deduced that slaying rival Cardinal Heroes might prolong her dimension’s existence. Targeting Naofumi Iwatani, she nonetheless acknowledged his unmatched skill after observing his battles, their confrontations laced with lethal intent and grudging respect. Stern and unyielding, Glass prioritizes her world’s survival above morality or mercy. She holds heroes to exacting standards, disdaining perceived weakness, yet reveals warmth and loyalty in Kizuna’s company—a duality balancing ruthless pragmatism with deep camaraderie. Her evolution from antagonist to ally saw her collaborate with Naofumi, seeking alternatives to mutual annihilation. During a interdimensional visit, her ill-fitting European garb contrasted starkly with her signature black kimono, its silver embroidery echoing her heritage and disciplined demeanor. Shaped by systemic prejudice and betrayal, Glass wields martial mastery, Spirit Power, and strategic brilliance to defend her realm. Her journey culminates in embracing unity over isolation, recognizing that cross-world cooperation might break the Waves’ cycle—a testament to her growth from solitary guardian to reluctant bridge between doomed dimensions.