Jealous Cat (妬み猫, Netami Neko) is an evil spirit, who targets cute cats turning them ugly.
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.