She is present in the manga adaptation of Code Geass with a few differences. She attends Ashford Academy for three days before she becomes the Viceroy of Area 11 and discovers that Lelouch and Nunnally are alive. Euphemia also plays a major role in the manga "Code Geass: Nightmare of Nunnally". She succeeds with the creation of the Special Administrative Zone and garners the support of the Six Houses of Kyoto. Towards the end of the manga, Euphemia becomes the 99th Empress of the Holy Britannian Empire.