Back when he was alive, he was not wanted by anyone due to its ugly appearance. Thus, as a spirit after his death, he would create illusions on cute cats rendering them ugly. Rokumon and Kurosu competed for its capture, as whoever catches him receives a large supply of high-class brand of cat food as a reward. With a little help from Rinne, Rokumon was the victor.
- His story is mixed with Kuroida's in the anime.