Ri Kaiō, a Chinese martial artist, stands as brother to Kaiou Han and grandson to Kaiou Kaku. He practices Chinese Kenpo with a specialized focus on poison-based techniques akin to Ryuukou Yanagi's Poison Hand method. When actively employing this technique, his hands develop a distinct pinkish coloration. During a confrontation in the Chinese Challenge tournament, he inadvertently neutralized an opponent's poison by administering a different toxin, restoring the opponent's combat readiness. He maintains a serious and composed demeanor, characterized by discipline and dedication to rigorous training. He typically avoids relying on specialized techniques unless facing opponents he deems sufficiently challenging. In physical appearance, he possesses an average height and well-defined build, with prominent cheekbones and dark hair graying at the temples. His standard attire consists of a white yī-fu kung fu uniform and traditional kung fu shoes. His primary documented involvement occurs during the Raitai Tournament, where he competes alongside other martial artists.