Sumako Aotsuki

Sumako Aotsuki serves as the mother of protagonist Ushio Aotsuki and carries the immense burden of being the third-generation 'Oyakume-sama'—a sacred guardian who single-handedly maintains a deep-sea barrier imprisoning the fearsome demon known as Hakumen no Mono. Born into the spiritually gifted Hizaki clan, she has spent over a century in solitary vigil beneath the ocean, enduring the heartache of separation from her family without ever wavering in her duty. Her love for Ushio is the very spark that ignites his journey, and at the climax of the final battle, her barrier powers prove to be a decisive turning point.