Henry VI of England is a historical figure that appear in Nightmare of Nunnally as a leader of the English Faction during the Hundred Years' War. He only appear in two panel in Nightmare of Nunnally and have no speaking role as he let Lord John to handle the matter, in the manga he is portrayed as a child and not as an adult. Henry VI died while holding a goblet probably to implied the readers that he was poisoned. Source: CodeGeass Wiki