Benio Myōjin, eldest daughter of the Myōjin shrine maiden lineage, bears her family’s sacred charge to seal humanity-threatening oni. While her younger sister Ōka inherits the pivotal Shikizakura ritual, Benio spearheads independent combat operations, commanding a dedicated team—including allies Ukon Kijima and Issa Inuzuka—with strategic precision and martial mastery.

Distinguished by silver hair, long bangs, and a lithe frame, her "platinum blonde cool beauty" contrasts with battle-ready practicality: gloves, a reinforced suit, and a blade underscore her frontline leadership. Her combat style prioritizes masterful swordsmanship and tactical ingenuity, setting her apart from peers.

Beneath her composed authority lies fierce devotion to Ōka. Daily rituals—morning and evening greetings—reflect her protective care, though unreciprocated gestures briefly fracture her stoicism. This duality defines her: a leader steeled for war yet vulnerable in sisterhood.

Rooted in generations of shrine maiden duty, Benio’s role complements Ōka’s ritual obligations. While her sister channels ancestral power to repel oni, Benio orchestrates coordinated strikes against active threats, cementing her as both guardian and strategist in the Myōjin clan’s eternal conflict.