Kaioh Son is a Chinese martial artist bearing the title of Kaiou, signifying mastery in Chinese Kenpo. His distinct combat style specialized in finger-focused techniques. Son demonstrated exceptional finger strength, capable of shattering ten iron rings solely by flexing his fingers. However, Kaiou Retsu observed that Son's grip power fell short of Kaoru Hanayama's, an assessment proven correct when Retsu defeated Son in an arm wrestling contest.

Son represented the Chinese team at the Raitai Tournament, where his role centered on applying his formidable finger techniques in combat.