A poet employed by the Duc de Orléans, he issues orders both verbally and through a journal. The words he writes appear in copies carried by his followers. He confronts Queen Marie, attempting to use psalms to kill her, but underestimates her power and is defeated by her and the newly arrived Maximilien, who betrays him. Despite this, he survives and retreats to his hideout, where he contacts Lorrenza and Count Cagliostro. He is betrayed again and crushed by rocks, yet he survives and transforms into a gargoyle. Ultimately, he is defeated by both Louis and D'Eon/Lia.
In the manga, Saint-Germain plays a more significant role as a handsome mystery man hired by the Marquise de Pompadour to investigate her daughter's illness. Douglas immediately dislikes him, assuming he is a criminal, and takes pleasure in antagonizing him.
