ONA
Description
CZ2128 Delta, often referred to simply as CZ or Shizu, is an automaton battle maid and a member of the Pleiades Six Stars, the elite combat maid squad serving the Great Tomb of Nazarick. She was created by one of the Supreme Beings known as Garnet, whom she addresses as Doctor, and her primary function, alongside her sisters, is to serve as a final line of defense against intruders, delaying them until the guild members can prepare for battle.

In terms of appearance, CZ2128 Delta is a short, beautiful girl with long, straight red-gold hair. Her most distinctive features are the eyepatch covering her left eye and her visible right eye, which is an emerald green color with a target-like marking on the pupil. Her face is delicate and possesses an artificial, doll-like quality. She wears a uniform similar to her sisters Yuri Alpha and Narberal Gamma, but distinguishes herself with urban camouflage-patterned accessories and a small sticker with the number one yen attached to her skirt. A white magic gun is typically holstered at her waist like a sword.

Her personality is defined by her silent and seemingly emotionless nature. She rarely shows any facial expression and speaks in a flat, monotonous tone, often coming across as detached from social interactions. This mechanical demeanor is a core part of her automaton design. However, contrary to her cold exterior, she has a relatively high positive Karma value, which makes her, alongside Yuri Alpha, one of the only two Pleiades considered safe for humans to interact with. While she typically ignores human conversation, communication is not impossible with her.

Beneath her emotionless surface lies a genuine, if subtly expressed, benevolent nature. She harbors a strong hatred for cannibalism and has a pronounced, almost childlike affection for cute and fluffy things. She is often seen hugging adorable creatures or objects, such as the hamster-like Eclair Ecleir Eicler, and will refuse to let go until someone of authority, like Ainz Ooal Gown or Yuri Alpha, orders her to do so. A unique quirk is her habit of placing her signature one-yen sticker on things she likes, effectively claiming them as her own. Receiving this sticker from her is considered a mark of the highest favor within Nazarick.

The character’s background explains several of her unique traits. Her creator, Garnet, was responsible for designing the security systems of Nazarick’s Treasury. Consequently, CZ was originally equipped with extensive knowledge of all the traps, mechanisms, and unlocking methods throughout the tomb. As a security measure to prevent this sensitive information from being compromised, Ainz Ooal Gown personally manipulated her memory, replacing the real knowledge with false data.

In terms of abilities, CZ2128 Delta specializes in long-range combat as a sniper and gunner, making her a unique asset in Nazarick where such classes are rare. Her primary weapon is a silver magic gun that she can use for precise, semi-automatic fire as well as fully automatic barrages, and it can even be equipped with a silencer for stealth missions. For close-quarters combat, she is also proficient with a knife. As an automaton, she is completely immune to all forms of poison, making her resistant to many traps. Her equipment includes a legendary scarf that grants her the ability to turn invisible and become undetectable for short periods, which is ideal for infiltration. While her total level is 46, her physical attack power is considered the highest among all the Pleiades maids.

Key relationships within Nazarick further define her. She shares a unique and somewhat competitive bond with her sister Entoma Vasilissa Zeta, as they are considered twins but constantly argue over which one is the elder sister. Yuri Alpha, the eldest of the battle maids, sees CZ as the most normal and stable of her sisters due to her kind heart. Among the homunculus maids who perform general duties in Nazarick, CZ is the most popular member of the Pleiades, often being affectionately called Shizu-chan and treated like a mascot, with the maids sometimes competing for the chance to sit beside her.

Over the course of the story, CZ2128 Delta experiences subtle but notable development. While initially appearing as a purely functional combat unit, her interactions with others reveal a growing emotional complexity. A significant arc involves her partnership with Neia Baraja, a human from the Holy Kingdom. During a mission to rescue a prince, the two form a bond over their shared loyalty to Ainz, and CZ assists Neia in forming the Sorcerer King's Rescue Team. This partnership shows that, despite her programming and emotionless exterior, she is capable of building a bridge of friendship with a human being. Another glimpse into her inner world is seen in her search for comfort among the fluffy magical beasts of the sixth floor when she feels lonely or ignored, which prompts Yuri to promise to ask Ainz for a pet of her own. These moments highlight a quiet, endearing vulnerability beneath her mechanical surface.