Nekoko occupies the position of the Sixth Neck among the eight manifestations of Yamata no Orochi, a malevolent deity orchestrating global annihilation through perpetual darkness. Her title links her to the mechanical colossus *Izuhara no Tamazuchi*—a spherical war mech armed with beam cannons powerful enough to raze cities and shatter mountain ranges. She whimsically renames this weapon "Miau Miau," mirroring her feline-inspired mischief and childlike playfulness.

Physically resembling a youthful catgirl, Nekoko sports light brown hair, vivid blue eyes, and a chirpy voice. Her attire—a nurse uniform paired with an oversized syringe—crafts an illusion of harmless whimsy, starkly contrasting her true nature. The name "Nekoko" directly references her feline attributes, including keen curiosity and a prankster’s spirit. Yet beneath this facade lies a ruthless agent of chaos who gleefully unleashes her mech to trigger cataclysmic destruction, treating razed landscapes as mere amusement.

As a loyal enforcer for the Orochi, she collaborates with fellow antagonists to assault solar and lunar priestesses. Though her precise motives remain undefined, her actions oscillate between impulsive whims and steadfast dedication to the Orochi’s dark agenda. Within the overarching conflict, Nekoko’s narrative purpose hinges on the jarring duality of her cherubic appearance and apocalyptic capabilities, cementing her as a volatile, recurring adversary in the priestesses’ struggle.