Neuro Nōgami (脳噛 ネウロ, Nōgami Neuro?) is a horned bird demon detective from hell who feeds off mysteries/puzzles from objects or people. When he dismantles the mystery it releases energy for him to feed on. He left hell to find a mystery to satisfy his hunger. Once in the human world, he takes on a human form and forces Yako to be his assistant to hide his identity. In public, Yako is seen as the detective while Neuro is the assistant. He treats Yako as a slave, entitling her Servant #1, and abuses her excessively; though he does keep her from being harmed in dangerous situations and respects her potential in understanding humans (nevertheless remaining as brutal to her "small" cranium as he pleases).
Character is error.