Marie Antoinette is a fictional character in the anime series "Fate/Grand Order." She is a heroic spirit summoned as a Rider-class servant, embodying the historical figure of the last queen of France before the French Revolution. Known for her elegance and kindness, Marie is portrayed with a cheerful and optimistic personality, often bringing joy and positivity to those around her. In the series, she plays a supportive role, utilizing her abilities to protect and heal her allies in battle, while also providing moral support with her compassionate nature.