Demiurge hails from the Great Tomb of Nazarick, serving as Floor Guardian of the seventh floor and second-in-command among the guardians. Created by Ulbert Alain Odle, his core traits include high intelligence, strategic thinking, and inherent cruelty towards outsiders. He conducts sadistic experiments on captives, termed "Abelion Sheep," and orchestrates large-scale manipulations like inciting human-demi-human conflicts under the alias "Jaldabaoth." Transported to a school dimension with characters from various series, Demiurge superficially adapts to the structured environment. He enforces school regulations strictly as part of the disciplinary committee, partnering with Tanya von Degurechaff. This role involves monitoring Kazuma Satou, whom he controls using a Command Spell to prevent rule violations, especially attempts to peep on female classmates. His signature ability, Flash—emitting non-lethal light to burn targets' eyes—remains functional here. Despite his demonic nature and enjoyment of suffering, he channels his sadism into psychological manipulation and scheming against classmates, avoiding physical harm. He develops mutual respect for Tanya due to her adherence to order and unexpected resistance to his Command Spell, while clashing with the demon Vanir over differing methodologies, criticizing Vanir's approach to destruction. His unwavering loyalty to Ainz Ooal Gown persists; he interprets Ainz's casual remarks as profound wisdom and constantly seeks praise. This devotion manifests in meticulous rule-following to avoid jeopardizing their return to Nazarick, though his inherent sadism surfaces in contemplating elaborate punishments for hypothetical rule-breakers. His powers are constrained in this dimension; high-tier abilities like Meteor Fall and Evil Lord summoning remain unused, likely due to the comedic, non-lethal setting. His focus shifts to social manipulation, plotting alliances, and observing peer dynamics while maintaining a facade of civility. Demiurge exhibits no significant development, retaining his core traits: strategic brilliance, loyalty to Ainz, and a dual nature of surface gentility masking cruelty. His interactions remain transactional, viewing classmates as potential future test subjects. The dimensional transition alters only his available methods, not his ultimate goals or morality.