OVA
Description
CZ2128 Delta, designated CZ, is an automaton battle maid crafted by Garnet and a core member of the Pleiades Six Stars, the battle maid unit serving the Great Tomb of Nazarick. She possesses a short stature, long straight red-gold hair, and delicately sculpted artificial features. Her left eye is covered by an eyepatch, while her visible right eye shines emerald green with a distinct target-mark pupil. Her attire incorporates military camouflage-patterned accessories, a holstered white gun at her waist, and a noticeable "1 yen" sticker affixed to her skirt.

Personality manifests as outwardly emotionless, expressed through a flat tone of voice and a generally silent demeanor. Her relatively high Karma value designates her, alongside Yuri Alpha, as one of the two Pleiades deemed "safe" for human interaction. She typically disregards human conversation but can communicate under specific conditions. She harbors a distinct hatred for cannibalism while simultaneously displaying a powerful affinity for cute objects and beings, exemplified by her tendency to hug Éclair Éklair Éklare like a doll until commanded to release by a superior. She habitually marks favored items with one-yen stickers.

Her background establishes Garnet designed her as part of Nazarick's final defense layer against intruders. Due to limited combat effectiveness against high-level players, her primary function was to delay invaders while guild members readied for a last stand in the throne room. Garnet also embedded her character settings with knowledge of Nazarick's mechanism unlocking methods, a consequence of his role in designing the Treasury's security. Among Homunculus Maids, she holds the status of the most popular Pleiades member, inspiring competition for the seat beside her and requests for hug pillows modeled in her likeness.

Her documented activities span numerous story arcs. She guards Nazarick's 9th Floor entrance during the Undead King Arc. In the Bloody Valkyrie Arc, she aids Ainz within the Treasury and interacts with Pandora's Actor. The Two Leaders Arc sees her locate Lupusregina in the canteen while holding Éclair and admonishing Lupusregina's invisibility use. For the Dark Hero's Story Arc, she assists Yuri Alpha in auction organization, vocalizing "uwah" to inappropriate requests. At the Maid Tea Party, she expresses jealousy over Narberal Gamma's proximity to Ainz and punishes Entoma for blood contamination in her drink.

Her role expands significantly during the Men in the Kingdom Arc, participating in Demiurge's scheme to establish Momon as a hero; she partners with Yuri Alpha to battle Evileye under Jaldabaoth's command. In the Invaders of the Large Tomb Arc, she observes Dragon Hunt workers confronting Nazarick Old Guarders. The Pleiades Day Arc depicts her hugging Aura Bella Fiora's Spear Needle on the 6th Floor, seeking comfort in cute creatures after Éclair avoids her, prompting Yuri Alpha to promise requesting a pet for her from Ainz. The Craftsman of Dwarf Arc references Ainz testing a Control Amnesia spell on her without adverse effects.

Her most substantial development occurs in the Paladin of the Holy Kingdom Arc. After participating in a mock battle against Ainz as part of Jaldabaoth's forces, she undergoes house arrest within the Holy Kingdom's Liberation base. Prince Caspond assigns her to collaborate with Neia Baraja on rescuing the Zern prince from Kalinsha. The duo infiltrates the city via barrels, defeats guarding Vah Uns, and facilitates the prince's escape. Following this mission, CZ supports Neia in forming the Sorcerer King's Rescue Team and aids in subsequent operations, including the battle at Prart. Their partnership fosters mutual loyalty to Ainz, culminating in their joint recognition as heroes.