Retsu Kaioh, born Eishuu Retsu in a Chinese temple, mastered Chinese Kenpo through grueling discipline, from carving stone spheres barehanded to surviving a lethal qualification test where he escaped confinement and defeated armed guards. A tragic sparring accident that claimed his partner’s life led to temporary imprisonment, hardening his early arrogance and belief in Chinese Kenpo’s supremacy. At the Maximum Tournament, this hubris drove his ruthless clashes with fighters like Sergei Taktarov and Mount Toba, deploying Spinning Lotus strikes and precision pressure-point attacks. His victory over Katsumi Orochi via the Sunkei technique underscored both his mastery and disdain for non-Chinese styles. A transformative bond with Katsumi after the tournament redirected his path. Training at the Shinshinkai Dojo softened his rigidity, fostering respect for diverse martial arts. He embraced mentorship, guiding Katsumi and extending unexpected compassion to his former rival, the disabled Kaiou Dorian. Physical trials followed: against the primordial warrior Pickle, he lost a leg, adapting seamlessly to a pegleg without sacrificing combat prowess. Venturing into Western disciplines, he entered exhibition boxing matches, mesmerizing audiences by holding poses for hours and repurposing his defensive Xiaoli technique to absorb punishing blows. Though unimpressed by fame, his analytical brilliance and technical mimicry earned promoters’ admiration, further bridging Eastern and Western combat philosophies. His strategic genius shone in battles, dissecting foes’ weaknesses—shattering Mount Toba’s knee with surgical precision or replicating techniques after fleeting observation. Yet relentless pride proved his undoing. Facing Musashi Miyamoto, a resurrected swordsman, Retsu’s Xiaoli faltered against razor-sharp strikes, culminating in fatal spinal and organ injuries. Musashi later likened their duel to legendary clashes, a testament to its ferocity. From rigid traditionalist to eclectic mentor, Retsu’s legacy fused Chinese Kenpo’s pride with global martial humility. His innovations enriched combat arts worldwide, immortalizing a journey marked by resilience, adaptability, and an unyielding pursuit of martial transcendence.