Rihaku commands the Nanto Goshasei, guardians of Yuria and enforcers of equilibrium between Hokuto and Nanto’s martial legacies. When Yuria plunges from Shin’s fortress in a desperate bid to end her life, he spearheads her rescue amid Raoh’s encroaching assault on Southern Cross, steeling her resolve to ascend as the Last Nanto General—a role destined to consolidate Nanto’s strength against Hokuto’s turmoil.

After Dharma’s demise, Rihaku escorts Yuria to the Nanto Capital, anchoring her rise to leadership. He orchestrates strategic maneuvers, including Rei’s capture—a test to gauge the Nanto Suicho Ken master’s loyalty and redirect his skills toward Kenshiro’s struggle. As Yuria falters from illness, Rihaku secures her passage to Toki’s sanctuary, shrouding her identity behind armor and secrecy. His dialogue with Toki unveils a tactical mind attuned to unfolding wars: Rei’s grim path, the fracturing bond between Kenshiro and Raoh.

Rihaku’s presence anchors critical junctures in the clash against Raoh and Souther. He aids in recovering Kenshiro, shattered by Souther’s assault, and observes the departure of Yuria’s hound, Tobi—the “Dog of Destiny” bridging her fate to Kenshiro’s. With Kenshiro and Raoh’s cataclysmic duel looming, Rihaku stands unflinching beside Yuria, navigating the storm of uncertainty while shielding Nanto’s enduring creed.