Demiurge possesses dark skin, neatly combed black hair, and eyes perpetually narrowed behind round glasses. He wears a formal British-style suit and tie, projecting a gentlemanly appearance, complemented by a metallic-plated silver tail ending in six spiked tips; this visual design remains consistent. Within the school, he serves on the disciplinary committee, enforcing rules strictly. A sadistic inclination manifests through permissible activities like scheming against classmates without causing real harm, representing a shift as he adheres to regulations and enjoys the structured environment. He forms a working relationship with Tanya von Degurechaff, respecting her rule adherence and competence—a contrast to his general disdain for humans outside Nazarick. Their collaboration maintaining order defines a notable aspect of his interactions. He retains abilities from his origin world. A Command Spell compels compliance, effective solely on Kazuma Satou, used to prevent rule-breaking like peeping on female classmates. The Flash ability emits blinding light from his body, non-lethally impairing vision. These powers see limited use within school-centric scenarios. Absolute loyalty defines his service to Ainz Ooal Gown, whom he views as an infallible ruler, serving diligently as vice-representative. He frequently interprets Ainz's casual remarks as profound wisdom, reinforcing devotion. Interactions with Kazuma involve manipulation and magical punishment for rule-breaking. Conversely, he displays open animosity toward the demon Vanir, disapproving of Vanir's destructive methods despite their shared nature. In the film *Another World*, Demiurge is transported through a wormhole. Separated from the main group during a golem attack, he travels with a subgroup including Shalltear Bloodfallen and Aura Bella Fiora. This group encounters the golem Pantagruel, who aids them and guides them to a village for reunification with other displaced classmates. His role aligns with his tendency toward cautious observation over overt leadership.