Pandora's Actor serves as the Area Guardian of the Treasury in the Great Tomb of Nazarick, managing its finances, gold reserves, magical items, and world-class artifacts. Access requires possession of the Ring of Ainz Ooal Gown. Created by Momonga—later Ainz Ooal Gown—during a period favoring theatricality, his exaggerated design became a source of embarrassment for Ainz, leading to confinement within the Treasury except under specific directives. His appearance features a smooth, egg-shaped pink head with minimal facial details: two large black circles for eyes and a single mouth, lacking ears or a nose. He dons a distinctive yellow military uniform reminiscent of historical elite guards, complete with the Ainz Ooal Gown crest on his hat, a deliberate visual contrast to Nazarick’s other guardians. Pandora's Actor exhibits an overtly theatrical and flamboyant personality, marked by exaggerated gestures, German phrases, and grandiose declarations. Yet beneath this lies a deeply pragmatic, analytical, and strategic mind. He remains calm under pressure, meticulously observes details during missions, and adapts tactics based on situational analysis. Unlike most Nazarick NPCs, he seeks clarification on orders and offers suggestions to align execution with Ainz’s goals. His loyalty to Ainz is absolute, extending to combat against other Supreme Beings if commanded. He maintains a neutral moral alignment with low karma. His primary ability is shapeshifting into any of the 41 Supreme Beings, replicating their appearance, mannerisms, and 80% of their combat abilities—excluding unique traits like World Champion classes. He accesses 45 distinct forms, making him one of Nazarick’s most versatile combatants despite not being the strongest individually. As a level 100 NPC, his racial levels include Doppelgänger and Greater Doppelgänger, while class levels encompass Expert, Craftsman, and Lord of a Castle. Attributes are well-rounded, with notably high MP reserves, agility rivaling specialized guardians, and substantial HP. Secondary abilities include summoning explosive miniature doll replicas of himself. He utilizes complex magical items and possesses keen observational skills to enhance impersonations, though Nazarick inhabitants detect his false aura. Designed to preserve the legacy and appearances of Ainz Ooal Gown’s guild members, Pandora's Actor developed an obsessive passion for cataloging and maintaining magical items—a trait Ainz intentionally fostered to ensure contentment with his isolated role. This interest evolved into near-fetishistic intensity. He experiments with magic items and spells within the Treasury to analyze differences between YGGDRASIL mechanics and the New World’s magic system. He addresses Ainz as "Father," taking profound pride in being his direct creation and considering himself the "first prince" of the Sorcerer Kingdom. His intelligence rivals Albedo and Demiurge, occasionally acting as temporary leader in their absence. While other Doppelgängers like Solution Epsilon exist, his shapeshifting capabilities are superior due to his specialized build. He shares a behavioral similarity with Lupusregina Beta in maintaining a stark contrast between outward persona and true personality. Within the Isekai Quartet parallel world school setting, Pandora's Actor interacts with characters from other series. He collaborates with Roswaal L. Mathers as colleagues, co-writing test questions for Class 2. During a field day event, he participates alongside Roswaal, Vanir, and Mr. Rerugen in a cavalry battle against students from two classes. After Chris incapacitates Mr. Rerugen, the team continues, ultimately tying with Class 1 but losing to Class 2.