Kuroneko is a mysterious black cat that can at will been seen or unseen and also be incorporeal. It always seems to be around Kagami Ouri, and he seems to be the only person the cat talks to. It shows up at moments that involve the shikabane and shikabane hime and gives Ouri clues about them. The intention of whether it is friend or foe is unknown. The cat is identical to a pet that Ouri cherished as a child, which died after being run over by a vehicle. Soon afterwards, this cat appeared.