Although designated "Alter", it does not mean that she is a different side of Jeanne D'Arc. She is instead a Jeanne of vengeance that Gilles De Rais, the French Army's marshal who grieved for Jeanne d'Arc's death, fabricated by means of the Holy Grail. As a Heroic Spirit that is an exact opposite of the proper Jeanne, she is manifesting in the Avenger Class. Since the proper Jeanne is not a hero, but a holy woman, the possibility of "summoning a different side of her" is nil. Because this black Jeanne has Gilles de Rais' anger... prejudices and wishes for her to be like that... mixed in her fundamental parts, a "side" that should never have happened ended up being brought to the surface. A dragon witch that takes revenge on France. A holy woman who talks about justice as if she owned the place and, without having any doubts about that, is spurred on by the wrath against the people; that is the form which Gilles de Rais wished her to be like.