Issamu Minami is the protagonist of Kamen Rider Black Sun, a darker reimagining of the Kamen Rider Black franchise. He is a human who becomes Kamen Rider Black Sun and struggles with the violent conflict between humans and kaijin. The character serves as the emotional and moral center of the series, confronting discrimination, political corruption, and the cost of power. His journey focuses on identity, survival, and the possibility of coexistence in a world driven by hatred.