Demiurge

Demiurge is the overseer of Nazarick’s seventh floor and a master strategist responsible for the Great Tomb's defenses. Though highly intelligent, he is widely regarded as the most cruel inhabitant of the tomb, finding pleasure in conducting horrific experiments on captives. While he maintains a commanding role in military tactics, he shares a unique bond with Mare, possessing a keen insight into the Dark Elf's more manipulative tendencies.