Description
CZ2128 Delta is an automaton battle maid serving in the Pleiades Six Stars, the elite combat unit of the Great Tomb of Nazarick. Created by the Supreme Being Garnet, her design incorporates specialized knowledge of Nazarick's security systems, particularly mechanism unlocking protocols, stemming from Garnet's work on Treasury security with Tabula Smaragdina.

She possesses a short stature, red-gold straight long hair, and an eyepatch covering her left eye. Her visible right eye displays an emerald iris with a distinctive target-mark pupil. She wears military camouflage-patterned accessories and a standard Pleiades maid uniform modified with urban camouflage. A notable deviation is the white gun holstered like a sword at her waist and a "1 yen" sticker affixed to her skirt.

Despite an outwardly emotionless demeanor and flat vocal delivery, she holds a Positive 100 Karma value, making her one of the two Pleiades considered relatively safe around humans. She exhibits a strong affinity for cute entities, hugging them persistently until ordered to release them by authority figures, as seen with Éclair Éklair Éklare and Aura Bella Fiora's magical beasts. She also places "1 yen" stickers on favored objects and dislikes cannibalism.

Originally designed as part of Nazarick's last defensive layer against intruders, her tactical role involved delaying enemies until guild members could mobilize rather than achieving direct victory. She enjoys exceptional popularity among Nazarick's Homunculus Maids, who compete for her proximity.

Her chronological involvement spans critical events: patrolling the 9th Floor entrance during the Undead King Arc; assisting Ainz in the Treasury during the Bloody Valkyrie Arc, displaying hesitation when ordered to attack Pandora's Actor disguised as Tabula Smaragdina; participating in undercover operations as Jaldabaoth's subordinate in the Men in the Kingdom Arc, partnered with Yuri Alpha against Evileye; and infiltrating the Holy Kingdom alongside Neia Baraja. There, they rescued the Zern prince, defeated a demon commander, established a partnership, and led to CZ supporting Neia's Sorcerer King's Rescue Team. She later experienced emotional distress after Nazarick's near-destruction, seeking comfort by hugging Aura's creatures. Her mental state was monitored by Yuri and Albedo, culminating in a misunderstanding during a mission with Aura where "sheep" referred to human corpses for parchment, deepening her despair until Momonga intervened.

In the *Ple Ple Pleiades - Clementine Tōbō-hen* spin-off, she participates in Nazarick's martial arts intelligence-gathering operations, encountering the reincarnated Clementine evading the Slane Theocracy and Momon, complicating Clementine's efforts to remain hidden.

Her favorite high-calorie drink tastes of strawberries, chocolate, and banana. Tabula Smaragdina created her in the web novel continuity. Her class as a "Gunner" originated from Yggdrasil's "Fall of Valkyria" update.