Hyouga is a tall, physically built individual with short white hair and perpetually squinting dark purple eyes. Early appearances show him wearing a black mask over his nose and mouth to conceal de-petrification scars, which later heal completely. His distinctive attire features bird feathers around the neck, tan gloves, knee-high boots, a long black cloak, and a warrior-style skirt secured by an elaborate sash. Initially revived by Tsukasa Shishio, Hyouga serves as a high-ranking commander in the Empire of Might. He shares Tsukasa’s goal of selectively reviving only the young but adheres to a strict social Darwinist ideology, categorizing humans as "enlightened/strong" or "unenlightened/weak." He advocates eliminating ordinary individuals to conserve resources for the elite, viewing the petrification event as an opportunity to reshape humanity. Despite this ruthless philosophy, he respects those demonstrating exceptional skill or discipline, like his loyal lieutenant Homura Momiji or Kinro’s strategic prowess in combat. His calm demeanor persists during betrayal or defeat, yet he displays cruelty toward expendable subordinates, sacrificing men to test environmental hazards. His combat effectiveness centers on mastery of the *kudayari*, a specialized spear whose sliding handle tube enables Kan-style techniques. This style produces erratic, high-speed thrusts overwhelming opponents, allowing him to contend with multiple fighters like Kohaku, Magma, and Kinro. Without this weapon, his prowess diminishes significantly. Stat assessments rank his speed and technique as top-tier, with extended reach complementing his analytical battle sense. He quickly identifies opponents’ strengths and weaknesses, exemplified by exploiting Tsukasa’s emotional vulnerability after Mirai’s revival. His character evolves across key conflicts. During the Stone Wars, he betrays Tsukasa, stabbing him post-Mirai’s revival, and attempts to recruit Senku for his elitist vision. Following defeat and imprisonment, he is revived during the Treasure Island crisis. Facing Mozu, he allies with Senku’s Kingdom of Science, rejecting Mozu’s shallow values and wielding a science-enhanced *kudayari* to win their duel. This partnership solidifies his loyalty; he negotiates terms for cooperation, including reviving Homura and Mozu to confirm alliances. Post-revival, he collaborates with former rivals like Tsukasa in training warriors and resource gathering, setting aside past conflicts for collective goals. Relationships define his trajectory: he trusts Homura implicitly for her competence; respects Senku’s intellect but maintains distance; and shifts from antagonism to mutual respect with Kohaku and Mozu. His final acts include strategizing against Stanley Snyder’s forces and later contributing to the Kingdom of Science’s expansion efforts, such as hunting for materials during the American expedition.