Satsuki Shinomiya is an alternate personality of Natsuki Shinomiya from the anime series 'Uta no Prince-sama.' Satsuki emerges when Natsuki removes his glasses, displaying a stark contrast to Natsuki's gentle demeanor. He is aggressive, blunt, and a musical genius, particularly skilled in composition and arrangement. Satsuki plays a significant role in showing the complexity of Natsuki's character, adding depth to the story and challenging the dynamics within the idol group.