Namu Ebisumori is a distant relative of Kaya and a member of the Ebisumori family, a lineage with a strong connection to the supernatural. He attends Hanamugi Kindergarten alongside Kaya, though his exact age places him as a fellow student. Like other members of his family, he carries a generally stoic expression and does not openly display his emotions, but his personality is more nuanced than his calm exterior suggests. He genuinely enjoys scary stories and does not doubt Kaya’s ability to see spirits, yet he is paradoxically terrified of dark places and often frightened by the entities they encounter. This combination of curiosity and fear defines his behavior: he possesses deep traditional spiritual knowledge and can sense auras, making him a valuable source of lore about the ghosts and phenomena Kaya faces, but his cowardly nature means he frequently relies on Kaya for protection.

His motivations are driven by a sense of suspicion and caution regarding Kaya’s immense power. He refers to her as the eighth shrine maiden and understands that the eldest members of the Ebisumori family are fated to develop extraordinary abilities. Rather than immediately aligning with her, he maintains a careful distance, questioning whether her power will remain a force for good or eventually become a danger. He has a personal history of being cast out by the Ebisumori family and harbors a grudge, which adds complexity to his stance. In the story, he serves as a tactical foil to Kaya’s brute-force exorcisms, providing context and ritual knowledge. His key relationships include his distant kinship with Kaya, a grudging respect for her teacher Chie, and a connection to other Ebisumori relatives such as Nana and Mutsu.

Over the course of the narrative, Namu develops from a wary observer into a more active ally. He gradually overcomes his intense fear of the supernatural, learning to apply his family’s spiritual heritage more effectively during crises. His notable abilities include exceptionally strong psychic powers—described as among the most powerful in the country—the capacity to sense auras, and familiarity with traditional Buddhist exorcism techniques. He also demonstrates physical courage when necessary, such as saving Kaya from a non-supernatural abduction. While he never fully sheds his cautious nature, his growth centers on finding the resolve to stand beside Kaya and Chie when it matters most.