The RPI-13 Sutherland is a mass-produced Knightmare Frame used by the Britannian military in the anime series Code Geass: Hangyaku no Lelouch. Known in Japanese as “Kashoushiki,” the Sutherland serves as the backbone of Britannia’s ground forces, representing a significant advance over earlier Knightmare models. It plays a crucial role in many battles throughout the series, often piloted by both main and minor characters. Its versatility and reliability make it a symbol of Britannian technological dominance.