Yūjirō Hanma, dubbed "the Strongest Creature on Earth" and "the Ogre," wields unmatched physical power intertwined with a morally enigmatic nature. As the son of Yuuichirō Hanma—the strongest warrior of his time—he inherits fearsome abilities, most notably the Demon Back, a transformative combat technique marked by demonic musculature across his spine. Towering at 190 cm (6'3") with a 120 kg (265 lbs) athletic build, his imposing presence is accentuated by fiery red hair, piercing crimson eyes, and a thick, muscular neck. Enlisting in the Vietnam War at 16, Yūjirō annihilated the U.S. military single-handedly, securing political immunity and solidifying his mythos as a superhuman entity. Prolonged combat shifted his youthful restraint into ruthless savagery, fueling a mercenary career defined by high-stakes contracts for global powers. His opulent lifestyle mirrors the vast wealth amassed through these endeavors. Arrogant and brutal, Yūjirō equates mercy with frailty, reveling in sadistic acts like slaughtering foes or tormenting family. He executed Emi Akezawa, mother of his son Baki, for perceived parental leniency—a pivotal event driving Baki’s quest to overthrow him. Yet fleeting vulnerability surfaces, such as offering Baki soup as tacit acknowledgment of growth or shielding those tied to Emi. His clashes with reincarnated swordsman Musashi Miyamoto end in stalemates, underscoring mutual reverence between titans. A polymath of combat, Yūjirō commands every martial discipline, from Brazilian Jiu-Jitsu to archaic Udonde, amplified by supernatural speed, reflexes, and endurance. Legendary feats include halting earthquakes with fists, enduring lightning strikes, and overpowering primal adversaries like Pickle. Rejecting weapons, he deems his body humanity’s ultimate instrument, championing raw strength as supreme virtue. Biologically aberrant testosterone levels warp his worldview: he brands himself the sole true male, others mere inferiors. This dogma fuels atrocities like sexually assaulting Joe Williams, inflicting enduring trauma. Chronologically in his 70s due to Vietnam-era service, his physique defies age—a contradiction handwaved by the narrative’s fluid timeline. Beyond acknowledged sons Baki and Jack, Yūjirō allegedly sired countless unclaimed heirs globally. His bond with Baki veers between hostility and warped mentorship, relentlessly testing his son’s limits. Warriors like Kaoru Hanayama and Doppo Orochi garner tepid respect for surviving his onslaughts, though most he dismisses as feeble. Within elite circles, Yūjirō maneuvers with intellect and charisma, exploiting influence to preserve autonomy. Feared by nations and combatants alike, he endures as an apex paradox—an avatar of untamed destruction who inadvertently forges rivals’ strength through relentless confrontation.