Rihaku, known as Rihaku of the Ocean, is a military commander of the Nanto Goshasei, sworn to protect the Last Nanto General, Yuria. Tasked with defending her from threats such as Raoh, he crafts intricate traps to stall Raoh’s forces, though these strategies falter against the warlord’s unmatched strength. Kenshiro intervenes during their clash, sparing Rihaku’s life and revealing Musō Tensei—the ultimate technique of Hokuto Shinken. While the manga portrays him as a nameless martial artist guarding Yuria, the anime assigns him the style Gosha Hasui Ken, which fails to overcome Raoh. The TV series expands his backstory, depicting him as Yuria’s lifelong caretaker—a role absent in the manga, which instead features an unnamed guardian. After confronting Raoh, Rihaku joins the Hokuto Army as a strategist, guiding allies like Lin and Bat through post-war struggles. Spin-offs such as *Fist of the North Star: Ken’s Rage 2* highlight his tactical acumen, aiding Kenshiro’s journey to Yuria and later assisting the Hokuto Army against foes like Kano. Standing 198 cm tall and weighing 128 kg, he is described as a seasoned military leader whose expertise predates the apocalyptic era. Official ratings rank him at Level D, with scores of power (3), speed (2), skills (2), looks (2), and charisma (4). He survives as the sole Nanto Goshasei member to endure the series’ conflicts. His name originates from Li Bai, the Tang dynasty poet, though no direct narrative ties exist. In the *Legend of Yuria* OVA, his first meeting with Yuria follows her rescue from Southern Cross, altering their established relationship. Across adaptations, his legacy underscores unwavering loyalty to Nanto, adaptability in shifting alliances, and pragmatic survivalism in a fractured world.