Nekoko, a petite catgirl with a high-pitched, squeaky voice, habitually dons a nurse’s uniform and brandishes an oversized syringe. Her demeanor aligns with the classic cheerful catgirl trope, though a hidden history reveals her as a survivor of invasive medical experiments—events that presumably forged her loyalty to the Orochi faction.

The syringe she carries administers potent curative medicine, effective against wounds and diseases but notorious for inducing excruciating pain during injection. Beyond its healing function, the device doubles as a projectile weapon, capable of rocket-propelled launches that unleash destructive kinetic impacts matching conventional arms in her world.

She operates Izuhara no Tamazuchi, a colossal mechanized sphere colloquially dubbed "Meow Meow," armed with an array of cannons whose firepower reduces structures to rubble.

Her persona, backstory, and arsenal collectively underscore narrative motifs of medical ethics, experimentation, and their enduring repercussions.