Ryo Hattori, heir to a Shinobi lineage sworn to shield shrine maidens, serves as the steadfast guardian of Oka Myoujin, blending ancient duty with relentless vigilance. His mastery of swordsmanship and martial arts, honed through relentless training, arms him against supernatural forces threatening the mortal realm. To confront Oni—malignant spirits invading through human hosts—he dons the Yoroi, an exoskeleton armor merging ancestral ninja arts with cutting-edge technology, its transformative power unleashed in pivotal battles to amplify his combat prowess.

Calm and methodical by nature, Ryo’s composure fractures only in the heat of confronting Oni, revealing a fiery resolve to annihilate these existential threats. As a tactical leader, he orchestrates defenses while engaging foes directly, his dual blades a whirlwind of precision. The Yoroi’s activation—a seamless fusion of tradition and innovation—epitomizes his role as a bridge between eras.

Rooted in Mie Prefecture’s Shinobi legacy, his identity is forged by unyielding loyalty to his sacred oath. Central to his purpose is safeguarding Oka during the Shikizakura ritual, where cherry blossoms entwined with autumn leaves mark the thinning veil between worlds, demanding his vigilance to preserve equilibrium between realms.