Airi is a Netherworld wraith bound by an obedience spell to serve the Swamp Witch as a maid and combatant in the Queen’s Blade tournament. To maintain her earthly form, she must absorb life force from living beings, especially beautiful women, typically through touch or kisses. She has long red hair in twintails and blue-green eyes. Her French maid outfit is a mental projection that can fade when she is weakened or loses concentration, leaving only undergarments before she becomes incorporeal. She wields a large scythe and can summon spirits to immobilize enemies. Her abilities include rapid regeneration, flight, and turning intangible, though the transformation takes several seconds. A notable vulnerability is her extreme ticklishness, which rivals like Melona have exploited. Despite her lethal duties, she maintains a calm and professional demeanor, and in the anime she shows protective kindness toward a boy named Rana. Her loyalty to the Swamp Witch is absolute, and she endures torture to prove her devotion. She views fear as enhancing the flavor of her victims’ life energy.