Tōru Takagami, the eleven-year-old younger son of the Takagami family, inherits potent Yin energy through his mother Miyako's bloodline. This spiritual trait makes him a perpetual target for yōkai and supernatural entities drawn to exploit his energy while granting heightened sensitivity to perceive spirits—even witnessing his deceased mother during her Soul Ascension ritual. Having no memories of Miyako, who died shortly after his birth, Tōru exhibits unease when questioned about her, reflecting unresolved feelings toward her absence. His vulnerability directly triggers his older brother Noboru’s decision to unseal the fox deity Kūgen Tenko for his protection. Initial encounters with malevolent beings, like an Edamame Bean Woman, demonstrate Tōru’s dependence on guardians Kūgen and Kō while simultaneously unveiling his latent connection to his mother’s protective spirit.

A pivotal moment unfolds when Kūgen performs a taboo ritual to bridge the spirit realm, partly motivated by Tōru bearing a scar identical to Miyako’s. During this event, Tōru communicates directly with his mother’s spirit, achieving partial closure about her legacy—an interaction showcasing his unique spiritual receptivity as the sole living witness. His role evolves beyond passive vulnerability when he inadvertently carries the Reverse Circle artifact, sought by deities like Mubyōu, and aids in conflict resolution. Tōru’s compassionate nature emerges as he mediates tensions among guardians, notably alleviating Kō’s insecurities about her role. His character arc traces a gradual acceptance of his perilous spiritual heritage, tempered by inherent kindness and concern for others, while his relationships with guardians and deities cement his stabilizing influence amid supernatural turmoil.