Makoto Teruhashi, known professionally as Tōru Mugami—a stage name punning on "Six Supernatural Powers"—is the 17-year-old (currently 18) older brother of Teruhashi Kokomi. Standing 178 cm tall and weighing 64 kg, this top idol actor was born on March 4. Publicly, he cultivates a charming, approachable image that garners him admirers like Saiki Kurumi, Rifuta Imu, and Kaidou Shun. Privately, he displays an intense sister complex, obsessively monitoring Kokomi through stalking and uninvited entries into her personal space. He aggressively confronts perceived romantic rivals, especially Saiki Kusuo, insisting only he deserves Kokomi and planning to marry her. Makoto neglects professional obligations, such as abandoning film shoots during school trips to surveil his sister. His misguided gift-giving includes disturbing choices like a knife holder resembling a stabbed dog or an unsettling blue mug, intended for Kokomi. His autobiography has surpassed 100 million copies sold. He claims a rivalry with SPLEEN idol group member Shizuru Ruchi, though it remains one-sided due to Ruchi's indifference. Across all official manga, anime seasons, and the "Reawakened" special, his core traits—idol status, protective fixation on Kokomi, and dual personas—persist without evolution.