Onari's mother is a human woman who is never given a name in the series, and her presence is felt mainly through memory, dream, and the objects she left behind. Her known story begins and ends on a stormy night about ten years before the main events. During that storm, which was caused by the thunder god Naridon and his brother Putaro, she and her family were caught in a car accident in the human world. Although gravely injured, she was still alive when Naridon came down to the scene. In her final moments, she handed her infant daughter Onari, along with a small doll, to Naridon. The car then fell from the road and she died. That single act defines her character: faced with certain death, she chose to give her child to a stranger in the hope that Onari would survive. Her personality is not developed beyond this, since she appears only briefly in Onari's dreams and in the keepsake doll that Onari treasures as a gift from her mother. Her motivations are purely maternal and protective, rooted in the wish to keep her daughter safe even when she could not keep herself safe. In the story she serves as the key to Onari's true identity. The doll she gave Onari draws the suspicion of Naridon's brother Putaro, who realizes that Naridon is hiding a secret. That discovery leads to the truth that Onari is not a Kami but a human child, and that humans are the beings the Kami call Oni. The memory of her mother also shapes Onari's emotional journey, as Onari dreams of her and crosses into the human world searching for clues about her origins. Her relationship with Onari is expressed through these fragments rather than direct interaction; she is a figure of love and loss whose absence Onari carries throughout the story. She also forms an indirect connection between the human world and the world of the Kami through Naridon, who accepts the responsibility of raising Onari after being entrusted with her. In terms of development, the character does not change over the course of the series because she exists only in memory and dream, but her significance deepens as the truth of Onari's birth comes to light. She has no supernatural abilities or powers; her importance lies in her humanity, her love for her daughter, and the choice she made on the night she died.