Suguru Oomi acts as the unofficial leader and master tactician among the guardians sworn to defend the Tamayori Princess. As a descendant of the legendary serpent Orochi, he commands the power to weave formidable seals and barriers, bend water to his will, and stand as a bulwark against threats. His 180 cm frame, crowned with moss-green hair and piercing amber eyes, contrasts with his courteous and dependable demeanor, frequently offering warm smiles that mask the weight of his responsibilities—though flashes of a mischievous, almost childlike spirit surface unexpectedly.

The ritual sacrifice of his mother, a former Tamayori Princess, to sustain the seal imprisoning the cursed blade Onikirimaru, remains a defining trauma that fuels his vehement rejection of sacrificial traditions. This legacy drives his dual resolve to shield the current princess while covertly dismantling the systems that destroyed his family. Despite his composed exterior, he nurses a simmering resentment toward Drei, an operative of the antagonistic Logos faction, yet navigates their clashes with detached professionalism.

Once branded a traitor during a brief, strategic alignment with Logos, the insinuations crumbled under scrutiny, revealing calculated subterfuge rather than betrayal. His analytical mind and talent for mediating conflicts solidify his role as the group’s stabilizer and steadfast voice of reason—though shadowed by ambitions shaped in the ashes of his mother’s tragedy.

In quieter moments, he finds solace in tea ceremonies and the disciplined art of calligraphy, rituals mirroring his contemplative nature. The blood of Orochi and the specter of his mother’s fate intertwine in his eternal conflict between ancestral duty and the quiet revolution burning in his blood, forging a guardian as complex as the legacy he upholds—and seeks to transform.