Kaioh Kaku began as a brash young bodybuilder whose worldview shattered when an elderly Chinese martial arts master defeated him effortlessly. Abandoning physical strength, he devoted over a century to mastering Chinese Kenpo, embracing its philosophy of "weakness overcoming strength." Relentless training withered his body into a skeletal husk, yet elevated his martial skill to unmatched levels, earning him the titles of Supreme Grandmaster and "Kaioh of Kaiohs." Ruthlessly pragmatic yet deeply reverent of martial tradition, he commanded China’s Raitai Tournament team through manipulation, maiming elders and swapping members to secure victory. His calculated brutality coexisted with a grudging respect for Yujiro Hanma, whom he honored as "Hanma Kaioh" after their ferocious clash. His signature technique, Xiaoli (or Shaori), grants dominion over kinetic energy. Defensive Xiaoli dissolves attacks via full-body relaxation, while Offensive Xiaoli unleashes accumulated force in crippling counters. This skill let him challenge Yujiro’s overwhelming might, momentarily overwhelming him with redirected power. Mastery extends to supersonic hand chops that slice objects, surgical pressure-point strikes, and a survival tactic inducing temporary clinical death by halting his own heartbeat. Deliberate physical decay embodies his philosophy—even mundane acts like using chopsticks demand grueling effort. Yet his frail frame conceals lethal prowess: severing limbs barehanded, enduring Yujiro’s Demon Back assaults, and felling younger, stronger foes through technical supremacy. Past feats include besting wild animals in youth and toppling adversaries decades his junior. In later years, he shifted toward mentorship, guiding fighters like Katsumi Orochi in blending martial arts styles. This role balanced his ruthless pragmatism with a commitment to advancing combat arts, solidifying his legacy as Chinese Kenpo’s living incarnation—a paradox of fragility and peerless mastery.