Naoya Shibano is the older brother of Yoko Shibano and the son of Kozo Shibano, the president of the international conglomerate Shibano Enterprises. He serves as a member of the board of directors of the family business. Naoya is a corporate operative who carries out his father's directives, often involving underhanded schemes to eliminate competition. His primary role in the story is as an antagonist to the Pretty Four, the neo pro-wrestling team sponsored by the rival TWP league. He frequently conducts missions on his father's behalf, including orchestrating sabotage and other attempts to ruin the Pretty Four's chances of success. His background is deeply tied to the Shibano family's ambition to dominate the world of Neo Pro-Wrestling, making him a key figure in the corporate and competitive conflicts the team faces. Little is shown of his personal motivations beyond loyalty to the family enterprise, and his personality is not explicitly detailed, but his actions reflect a willingness to engage in ruthless business tactics. His most notable ability lies in his strategic maneuvering within the business and wrestling industries, using the resources of Shibano Enterprises to further his father's goals. He interacts closely with his father Kozo and his sister Yoko, who is the general manager of the Shibano wrestling teams and wrestles under the persona of Sapphire. Naoya does not undergo significant personal development over the course of the series, remaining a consistent corporate adversary throughout.