|“||I wish the world was a gentle place.||„|
|~ Nunnally vi Britannia|
|“||I won't let you sacrifice yourself for me! There's something I have to tell you!||„|
|~ Nunnally to Lelouch|
Nunnally vi Britannia is the disowned Fourth Princess of Britannia, and eventual 100th Empress of Britania, and was sent to Japan with Lelouch as political hostages. She was blind and crippled thanks to Emperor Charles zi Britannia.
She lived with Lelouch in the Ashford Academy and Lelouch became Zero for her sake. After one year, Nunnally was replaced by Rolo Lamperouge who was a spy and assassin under Suzaku Kururugi and Villetta Nu.
She became the new Viceroy of Area 11 and arrived there, there she wanted to recreate Princess Euphemia's Special Administrative Zone of Japan. Alicia Lohmeyer was her aide and adviser and didn't agree on Nunnally's actions but let her do so as Viceroy.
Second Prince Schneizel claimed that Nunnally is next in line to the throne and plans to kill Lelouch to let her do so. Believing this is a heroic act, Nunnally controlled the Damocles ship and fired at Lelouch's forces. Although she was defeated and taken to face execution, but she discovered Lelouch's Zero Requiem and regretted of her brother’s death.
Throughout the series Nunnally has shown to be almost inhumanly kindhearted, patient and understanding. She endured her double handicap of blindness and paralysis with a smile and warmth (though Lelouch stated that she would throw terrible temper tantrums in private when she was little) and she is kind and empathetic to all those around her. Nunnally has gentle ideals and due to her telling Euphie to not expose her and her brother's royalty as well as her belief that what Zero is doing is wrong, she is on a neutral side meaning she will make the world a better place in her way.
However, like Lelouch, Nunnally has shown that she can make heavy-hearted decisions bordering on ruthlessness, as shown when she willingly fires multiple F.L.E.I.J.A. in order to make it a symbol of hatred for the entire world. Despite this, Nunnally's greatest weakness is her kind heart, unable to be as cold and calculating as her brother. Her greatest characteristic is her smile which, according to Lelouch, is her way of expressing gratitude to people around her. Nunnally is unable to walk, see, or take care of herself, so the least she could do is smile.