Amefurikozou serves as a supporting character linked to the renegade mikura, Nue. His gentle and benevolent nature offers a contrast to the narrative's darker elements. As a rain yōkai, he possesses the traditional ability to conjure rainfall, though this power is rarely demonstrated within the story. His key role involves aiding Nue in managing his bloodlust. He attempts this by stealing blood from hospital supplies, but his efforts fall short of satisfying Nue's needs. This insufficiency leads to a critical moment where the protagonist directly provides blood to sustain Nue. Amefurikozou's design incorporates key yōkai lore elements, featuring child-like characteristics and an umbrella, consistent with traditional depictions. His role remains centered on supporting Nue through their partnership, without significant evolution or explored backstory. His actions contribute to the story's themes highlighting coexistence between humans and yōkai.