Amefuriko is a male youkai dwelling within the narrative, specifically a snail-spirit embodying childlike qualities aligned with the "ugly cute" trope characteristic of true youkai in the series. The character's design occasionally prompts viewers to mistake him for female. Functionally, Amefuriko acts as a "Morality Pet" to the renegade mikura Nue, accompanying Nue's attempts to manage bloodlust through non-violent means. This partnership involves stealing blood from hospital reserves to secure sustenance, though the method ultimately proves insufficient to fully sustain Nue without triggering his predatory instincts. Amefuriko's existence reflects the broader conflict of mikuras, mechanically augmented evil youkai requiring fresh human blood for survival, creating narrative tension between their inherent needs and the ethical compromises necessary to meet them. His role remains primarily supportive within Nue’s storyline, emphasizing themes of companionship and the struggle against inherent supernatural drives, without direct involvement in combat or larger plot developments.