Charles V, Holy Roman Emperor (Sebastian Armesto)

Charles V is the young King of Spain and (after his election) Holy Roman Emperor, giving him control of various minor territories in Italy, Austria, Germany and the Low Countries; he is easily the most powerful monarch in Europe. Charles also controls Spain's considerable, newly-established colonies in the Americas, which he mentions to Henry in episode 1.03, suggesting they should both seek fresh conquests in the New World.