Raul emerges as the primary antagonist in the second series, usurping Empress Rui to seize control of the Celestial Empire. This tyrannical viceroy rules through manipulation and coercion, lacking personal combat prowess. He enforces his authority by exploiting the honorable warrior Falco—threatening the captive empress to compel Falco's service as his enforcer. Through this arrangement, Raul commands the empire's military while evading direct confrontations. His oppressive regime captures and enslaves civilians to construct his imperial capital. Physically embodying his scheming nature over martial skill, Raul avoids combat challenges and delegates threats like the Hokuto Army to subordinates. His ambitions unravel when Kenshiro confronts the empire’s tyranny. After Kenshiro overpowers Falco, eliminating Raul's enforcer, and the Hokuto Army liberates Empress Rui, Raul's reign collapses. Kenshiro delivers the final defeat, ending Raul's antagonistic role.