Kojuurou Katakura is the loyal retainer and right-hand man of Date Masamune, known as the Right Eye of the Dragon. His appearance, characterized by a facial scar and shaved head, along with his manner of speech and demeanor, are inspired by yakuza-style gangsters from film. He places honor and loyalty above all other values, a commitment that is tested when he once turns his sword against his master for what he believes is a just cause, even accepting the risk of execution. Although multiple characters hint that Katakura may be stronger than his lord, he harbors no ambition for himself and instead holds an unwavering faith in Masamune, viewing him as the future unifier of Japan. In the narrative, Katakura serves not only as a strategist and bodyguard but also as a brotherly mentor to the younger warlord, offering guidance while fiercely backing his decisions. His primary motivation is to see his master’s ambitions brought to fulfillment, and his development throughout the series revolves around the depth of his devotion and the rare moments when his own sense of justice challenges that loyalty. On the battlefield, Katakura is a formidable swordsman, wielding a katana and harnessing lightning-based techniques that make him a serious threat to any opponent.