Inspector Edogawa acts as the official intermediary connecting Mamiya Mugen and the Tokyo Metropolitan Police Department. A perpetually wary, clumsy, and timid presence, he navigates investigations with visible unease, often questioning or distrusting Mamiya’s unorthodox strategies. Though tasked with enabling Mamiya’s inquiries, he habitually voices skepticism or outright alarm during critical moments, his cautious demeanor starkly opposing the protagonists’ calculated risks, intellectual ingenuity, and occasional supernatural engagements.

Named as an homage to mystery author Edogawa Ranpo, his role encapsulates a law enforcer ensnared in surreal cases, mirroring the writer’s thematic legacy. His interactions with Mamiya and Alucard underscore a persistent clash between rigid procedural norms and adaptive problem-solving, positioning him as a recurring comedic counterbalance to their methods. The narrative retains his static portrayal as a secondary figure embodying bureaucratic friction, with no elaborated backstory or evolution beyond his function as a skeptical yet indispensable conduit between unconventional investigators and traditional authority.