A mysterious small creature that can roll into a ball and move by rolling. It has small, almost invisible eyes and can expand its body to three times its size after eating, then gradually shrink back. It discovered Ji Wuxiu's cooking and began bringing prey (including insects) to trade for roasted meat. It eventually moved into the black panther's tree hollow nest and seems to have a friendly relationship with both Ji Wuxiu and the panther. It communicates through squeaking sounds.
