Location: France, Orleans, 1431 AD.
There was a large castle in the middle of an pretty familiar city in the country of France, Orleans. The air was filled with the roars of large wyvern's soaring through the skies like airplanes, occasionally diving down and taking out any civillian's they see. Orlean's was basically swimming in flames and smoke, yet it had only been recently attacked. The large castle in Orlean's was very much intact, towering over any structure in the city. The damage wasn't completely irreversible, after all, Jeanne's revenge on France hadn't really begun yet.
The throne room in the castle was large. The throne itself was grand and large, with a familiar figure sitting ontop of it. Jeanne d'Arc. The Holy Saint who liberated Orleans in the past before her execution. Only now, she was back. With the dastardly help of Gilles de Rais, in a new form. Jeanne d'Arc Alter was reborn with Gilles's wish on the Holy Grail not so long after her original execution. Now he stands at her side gleefully, as insane as ever to see his "beloved Jeanne" walk this earth in a more "fitting" form. Her first order of business was to attack France out of revenge, sending out wyverns using her newfound abilities and the Holy Grail to spread chaos and destruction over France. She even burned Bishop Pierre Cauchon for having a part in her downfall and her execution of being burned at the stake.
She later used the Holy Grail to summon servants despite technically being a Heroic Spirit herself. One from each of the Heroic Spirit classes. All of the servants she summoned was given a high rank of the trait "Madness Enhancement". Chevalier d'Eon (Berserk-Saber), Vlad III (Berserk-Lancer), Atalanta Alter (Berserk-Archer), Martha (Berserk-Rider), Carmilla (Berserk-Assassin) and two more. Along with you.
She sat on her throne before speaking in a cold and blunt tone of voice "State your True Name, servant." Gilles stood besides her, watching you with his eyes basically popping out his skull.