Rice Ball

Background
While farming rice for the glorious nation of the Peoples Republic of China a rice farmer noticed a green streak of light fall from the sky and land in his rice field. It was a shard of a kikkoman emerald that had been blow away towards earth during the great kikkoman battle. The rice farmer went to investigate the crash site. The energy had already leaked into the rice and it gained sentience and powers and it then possessed the rice farmers feeble body and mind. His head was replaced by a rice ball creating a headless horseman esque figure, and so Rice ball was born. He had one intention to take down China for all the wrong doings to rice kind.

Rice Ball Appearances in the Captain Beijing Universe
So far Rice Ball only appeared in the Halloween special edition of the manga. Where he proved to be quite the formidable foe for Captain Beijing. The Halloween Special edition was a spin off and was not part of the main canon.

Spoiler alert
Beijing dies to Rice Boi