Kaiou Han is the older brother of Kaiou Ri and a practitioner of the Kaiou martial arts lineage under Grandmaster Kaiou Kaku. As a Kaiou-ranked fighter specializing in Chinese Kenpo, he demonstrates precise techniques like cutting an apple with a kick. During the Raitai Tournament, he faced Mohammad Alai Jr. Han initially gained an advantage in their match but ultimately lost after dismissing Alai Jr.'s boxing-centric style as incomplete due to its lack of kicking techniques.