This Knightmare Frame only appear in the Spin-off Manga called the Nightmare of Nunnally, the GX-01 piloted by Lucretia is one of the few non-combat Knightmare Frame shown in the Code Geass Universe and the only one ever used in actual combat, the Knightmare Frame was built with the task of providing terrain information and combat information with the help of her Geass to rest of the Irregulars while hiding safely behind friendly line, in combat the Knightmare Frame never leave to far away from Sancia's, Sancia and lucretia provide support in combat while Dalque and Alice responsible for hunting the enemy, the Knightmare Frame was Damaged by Cardinal Rolo Geass the Ice when they turn against him.