CZ2128 Delta, often referred to simply as CZ, is a powerful and enigmatic character in the anime series Overlord. She is a member of the Pleiades, an elite group of battle maids who serve Ainz Ooal Gown in the Great Tomb of Nazarick. CZ is known for her stoic demeanor and proficiency in long-range combat, particularly with firearms. Her personality is characterized by her calm and collected nature, and she rarely shows emotion. Despite her robotic appearance, she is highly loyal to Ainz and plays a crucial role in defending Nazarick from external threats.