RZA-10JS Percival is a knightmare frame associated with the Code Geass: Hangyaku no Lelouch universe. It is not a human character, but a machine used in combat by military forces in the series. Percival is portrayed as a specialized, heavily armed unit designed for battlefield superiority, reflecting the advanced mecha warfare central to the story. Its role is to serve as a powerful weapon in large-scale conflicts, contributing to the tactical and visual intensity of the series.