Margaret Walpole

Margaret (マーガレット, Māgaretto) is minor character first seen in Code Geass: The Miraculous Birthday.

Code Geass: The Miraculous Birthday
Margaret is first seen alongside Nunnally vi Britannia, Kaguya Sumeragi and Empress Tianzi sitting in some sort of event, presumably for the UFN. Schneizel el Britannia, Kanon Maldini, Nagisa Chiba, Zhou Xianglin, and an unnamed woman with glasses who can be assumed to be attending with Margaret.

Code Geass: Lelouch of the Re;surrection
Margaret appears in a couple scenes during the movie. She is first seen during the footage of Ohgi and Villetta's wedding, sitting at the same table as Nunnally, Kaguya and Tianzi. During the worldwide meteor shower seen after the battle in Zilkhstan, she is with Kaguya and Tianzi. During the credits, she is seen with Nunally and Tianzi, with the three of the wearing the same outfit.

Nunnally vi Britannia, Kaguya Sumeragi, and Tianzi
The four appear to be fairly close, as they are seen together in all of her appearances. They sat together while attending Ohgi and Villetta's wedding. She is seen together with Kaguya and Tianzi during the meteor shower seen around the world after the battle in Zilkhstan. During the end credits, she is seen wearing a with Nunnally and Tianzi, with all three of them wearing a matching outfit.