Azusa Shiga stands entangled in a web of familial obligation, supernatural forces, and fractured psyche. As the sole heir of the Shiga clan’s main branch, her childhood betrothal to cousin Yuzuru bound him as a mukoyōshi—a husband assuming her family name—under her mother’s iron will. Tradition dictated this union, cementing Azusa’s role as lineage preserver while isolating her from ordinary life.

A brutal sexual assault by older boys fractured her adolescence. Defending herself, she shattered an attacker’s skull with a stone, an act that ignited her symbiotic bond with ravenous spirits called "hungry ghosts." Drawn by her bloodline’s ancestral curse, these entities devoured the assailant’s remains, erasing evidence of her crime. Gradually, Azusa embraced the ghosts as allies, commanding them to dispatch perceived dangers—from a biting dog to human rivals.

Her mother’s sudden death, which she blamed on the ghosts’ wrath, intensified Azusa’s consuming obsession with Yuzuru. Relocating to Tokyo, she fixated on reclaiming him, shunning all other men and targeting his girlfriend Satomi as a rival. Her demeanor oscillated between wounded fragility and chilling menace, employing telekinesis and spectral apparitions to torment Satomi.

The manga traces her spiral into psychosis, exacerbated by the ghosts’ whispers and festering trauma. A climactic confrontation with Yuzuru and Satomi ends with Azusa impaled by an arrow. Mortally wounded, she confesses her incapacity to hurt Yuzuru before perishing in his embrace. The OVA diverges sharply: here, she attacks both with serpentine hair, only to be stabbed fatally by Satomi.

While the manga positions her as a vessel for vengeful spirits, the OVA implies her conscious surrender to brutality. Both iterations paint her tragedy—a woman torn between victimhood and villainy, shaped by generational curses, suffocating isolation, and childhood vows warped into violence.