M. Bison is the primary antagonist in the Street Fighter series, serving as a powerful and ruthless dictator and the leader of the criminal organization known as Shadaloo. Known for his iconic red military uniform and cap, Bison is infamous for his ambition to conquer the world and his desire for ultimate power. He possesses formidable psycho power, which he uses to manipulate and destroy his opponents. As a central character in the series, Bison's actions often drive the plot, making him a crucial figure in the Street Fighter universe.