Hyōga stands 189 cm tall with a muscular build, short white hair, and dark purple eyes that frequently squint. He initially concealed de-petrification scarring beneath a mask, though these marks healed completely. His attire consistently features a black cloak, grey warrior-skirt, feathered neckpiece, gloves, and knee-high boots. Prior to the petrification event, he served as assistant master of the Owari Kanryu Spear Technique, specializing in a unique spear-fighting style requiring his specialized hollow-shafted kudayari spear. Hyōga adhered to social Darwinism, believing only the "enlightened" or exceptionally skilled deserved to survive the rebuilt world, viewing the masses as burdens. This ideology aligned superficially with Tsukasa Shishio's initial goals, leading Tsukasa to revive him. Hyōga became a high-ranking enforcer in the Empire of Might. He demonstrated tactical cunning, manipulating allies like Gen Asagiri as a double agent and orchestrating diversions such as Homura Momiji burning Ishigami Village. His ruthless pragmatism included sacrificing subordinates to test hazards without remorse. He betrayed Tsukasa immediately after Mirai Shishio's revival. Exploiting Tsukasa's protective instinct, Hyōga attacked Mirai as bait and critically wounded Tsukasa. He then pursued Senku Ishigami and the injured Tsukasa, intending to force Senku into an alliance creating a world exclusive to the elite. Senku and Tsukasa defeated him through electrocution, resulting in his imprisonment. Transported imprisoned to Treasure Island as a contingency, Hyōga was petrified during Kirisame's attack. Senku later revived him to combat the Petrification Kingdom's leader, Moz. Assessing Moz's untrustworthiness and elitist views, Hyōga allied with the Kingdom of Science. Using a bamboo-enhanced kudayari provided by Senku, he defeated Moz, demonstrating his dependence on specialized spears for peak combat effectiveness. He was petrified again during Ibara's activation of the petrification device. Revived during the voyage to America at Tsukasa's request, Hyōga agreed to train the Kingdom of Science's fighters in modern weapon techniques on the condition that Homura and Moz also be revived. In South America, during a mission to destroy enemy communications, Stanley Snyder inflicted a near-fatal gunshot wound. Prioritizing mission success, Hyōga urged Kohaku to continue before succumbing. His life was preserved when the global petrification beam struck, turning him to stone mid-injury. Years later, revival fluid healed the wound upon restoration. Post-revival, he declined a pardon and became a martial arts instructor for the new world's police force, focusing on training rather than seeking power. Hyōga consistently displayed analytical prowess, mastery of the kudayari, and a formal, polite speech pattern. His signature phrase, "properly," reflected respect for competence in allies like Homura or adversaries like Kinro or Senku. While his elitist beliefs persisted, his actions evolved toward pragmatic cooperation with the Kingdom of Science, recognizing the value of collective scientific advancement over unilateral domination.