CZ2128 Delta, known alternatively as CZ or Shizu Delta, functions as an automaton battle maid crafted by Garnet within the Pleiades Six Stars—Nazarick’s elite combat unit. Her compact frame showcases delicate artificial features and flowing red-gold hair. An eyepatch covers her left eye, contrasting with her visible right eye, which bears an emerald-green iris and target-mark pupil. She dons a standard maid uniform enhanced with urban-camouflage accessories and a "1 yen" sticker on her skirt, alongside a white firearm holstered at her waist. Programmed for minimal emotional display, she maintains a silent presence and monotone speech. Despite this, her high karma value positions her among Nazarick’s least threatening entities toward humans. She harbors intense revulsion toward cannibalism but exhibits a profound fondness for cute beings, hugging them like dolls until superiors command release. Favored subjects often receive her signature "1 yen" sticker, extending to creatures like Éclair Éklair Éklare and Aura Bella Fiora’s Spear Needles, whom she embraces persistently if unsupervised. Designed originally to stall treasury intruders until Nazarick’s defenders mobilized—not to engage high-level foes directly—she possesses intricate knowledge of the tomb’s security systems, inherited from her creator’s design expertise. Popular among Nazarick’s Homunculus Maids, her presence sparks competition for closeness and inspires requests for hug pillows modeled after her. Her duties span routine security across Nazarick, including guarding the 9th Floor and aiding Ainz Ooal Gown in treasury management. During the Bloody Valkyrie incident, she hesitated to attack a false Tabula Smaragdina, reflecting her ingrained reverence for Supreme Beings. She later supports adventurer operations, participates in Jaldabaoth’s disguised campaign in Re-Estize, and monitors surface incursions near the tomb. Her fixation on cuteness triggers events like immobilizing Aura’s Spear Needle, necessitating superior intervention. A pivotal shift unfolds in the Holy Kingdom arc. After a staged conflict, she feigns defection to the Sorcerer King’s forces under house arrest. Prince Caspond partners her with Neia Baraja to rescue the Zern prince. Infiltrating the demi-human-occupied Kalinsha via meat-scented barrels, they eliminate Vah Un guards and extract Prince Beebeezee. Neia’s proposal for Zern refugees to seek Sorcerer Kingdom sanctuary surprises her. She later aids in slaying a demon commander, enabling Kalinsha’s liberation. This mission elevates her and Neia as heroes, cementing her support for the Sorcerer King’s Rescue Team and her role in Prart’s final battle. In the Isekai Quartet crossover, her appearance adapts to a chibi style while preserving core traits like camouflage accessories and emotionless affect. She navigates school scenarios alongside other isekai characters, sustaining her trademark silence. Notable interactions include committee engagements and discreet displays of her affection for cuteness, such as hugging magical beasts during class outings.