Leon Sykes

As a legendary American record producer with deep ties to the music industry's criminal underworld, this notorious figure serves as the series' main antagonist. He frequently clashes with Ryusuke Minami, driven by a desire to reclaim stolen treasures and suppress threatening demo tapes. While he holds a deep resentment for Ryusuke’s deceitful nature, he becomes increasingly obsessed with Yukio "Koyuki" Tanaka after discovering the young singer's unparalleled vocal prowess and magnetic stage presence.