Airi, a wraith bound to the Swamp Witch, serves as her devoted maid in the Queen’s Blade tournament, charged with eliminating adversaries. Her survival hinges on absorbing life force—preferably from beautiful women—through touch or kisses. Though her physical form remains solid, her maid attire manifests as a mental construct prone to deterioration when damaged, exhausted, or overwhelmed by uncontrollable laughter during torture.

Summoned from the Netherworld under an obedience spell, she executes tasks with stoic loyalty, enduring even prolonged tickling sessions by Melona to demonstrate fealty. This dedication persists beyond death: after being tickled to demise, forbidden magic orchestrated by Hulk and Doctor Strange revives her.

In battle, she wields a scythe and commands "Burazāzu" spirits to paralyze targets, complemented by rapid regeneration, intangibility, and life-draining prowess. These skills render her formidable against flesh-and-blood foes but ineffective against non-living entities. Her tactical shortcomings surface in the main series, while spin-offs like *Queen’s Blade: Unlimited* depict stark defeats—subjugated by Elina and marked by a collar and chain signaling diminished status.

Polite yet aloof toward enemies, she adopts casual speech with subordinates like Melona. An exception emerges in her bond with Rana, a boy addressing her as "Airi-nee," subtly thawing her reserve in the anime. Elsewhere, she coldly likens opponents’ fear to "seasoning" enhancing their life energy’s flavor.

Her narrative weaves servitude with flickers of autonomy. She briefly abandons duty to reside on a farm with Hulk, yet ultimately returns to the Swamp Witch. *Unlimited* underscores her fractured standing through symbolic restraints, juxtaposing vulnerability against her entrenched role in hierarchical power struggles.