Euphemia li Britannia is the Third Princess of the Holy Britannian Empire. A gentle woman who wanted to end war. She selected Suzaku Kururugi as her personal knight.
Euphemia li Britannia is the Third Princess of the Holy Empire of Britannia and goes to govern Area 11 alongside her sister Cornelia li Britannia after the murder of their half-brother, Clovis la Britannia. Despite strong anti-Japanese sentiment among her fellow Britannians, as well as her sister, Euphemia remains adamant in her empathy towards the Japanese people and even appoints Suzaku Kururugi as her personal knight.
In an effort to improve the lives of the Japanese in Area 11, Euphemia attempts to establish the Special Administrative Zone, wherein all Japanese citizens would be able to enjoy the same rights as Britannians. On the exterior, the Black Knights opposed this plan and called it a trap, however Lelouch knew Euphemia's intentions to be sincere and foresaw the fall of the Black Knights as a result. After speaking to her as Zero, he reluctantly agreed to go along with her plan. Unfortunately, as he explained the power of his Geass to her, Lelouch accidentally triggered the Geass and commanded Euphemia to kill all of the Japanese, even though it had been a joke. Accordingly, Euphie ran out on to stage and commanded the massacre of all the Japanese citizens that had collected within the zone. The soldiers, though confused, obey her commands and a slaughter ensues. The Black Knights intervene and Lelouch himself shoots Euphemia.
Euphie is rushed aboard the Avalon to receive medical treatment all the while trying to resist the command she'd been given. Suzaku is holding her hand as she dies.