Hayase, a Yanome government official, enforces the sacrificial rites of Ninannah’s young girls to the bear deity Oniguma. Cloaked in stoic authority, she wields manipulation and coercion to dominate others, drugging captives and threatening March with her friend’s execution to prevent rebellion. Her encounter with Fushi during the Oniguma ritual ignites an obsessive devotion, redirecting her life’s purpose toward controlling him. After Fushi maims her during an escape, leaving her face and torso scarred, her psyche fractures. Her tattered cloak and disheveled hair mirror her unraveling mind, fueling a deranged fixation on Fushi as a divine figure. She vocalizes delusions of bearing his child, undeterred by his revulsion. Reemerging on Jananda Island, she entraps Fushi in a gladiatorial contest. Victorious, she attempts to rape him, seeking to intertwine her lineage with his immortality. This act spawns the Guardians, a militant-religious sect sustained by her descendants, tasked with surveilling and manipulating Fushi across generations. Fusing with a parasitic Nokker, Hayase’s soul transcends death, reincarnating intermittently within her bloodline. Each successor—granddaughter Hisame, descendant Kahaku, and eighteenth-generation heir Mizuha—inherits her obsessive drive without her memories, perpetuating her quest to claim Fushi’s affection and offspring. A lethal combatant, she excels in archery, naginata, and unarmed combat, employing ruthless tactics and preternatural endurance to survive mortal wounds. The Nokker symbiosis amplifies her resilience, enabling posthumous influence over her lineage. Hayase’s legacy etches itself into Fushi’s evolution, catalyzing his deification. The Guardians mythologize him as a capricious deity, polarizing human faith over centuries. Her relentless pursuits force Fushi to grapple with mortality, ethics, and violence, hastening his emotional growth amid enduring trauma. In her final moments, abandoned at sea and assaulted by a Nokker, her physical form perishes. Yet her spirit endures through Mizuha, who inherits the Nokker and her ancestral obsession, ensuring Hayase’s shadow lingers into modernity as a perpetual thorn in Fushi’s existence.