de Beaumont, Lia

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Lia is D'Eon's older sister and a skilled fencer. She died under mysterious circumstances, and the narrative centers on uncovering the truth. Although flashbacks depict her as a caring and considerate young woman, her spirit is consumed by intense anger, sorrow, and a desire for revenge. Her unique sword stance allowed Teillagory to identify her when others were uncertain. As the series progresses, it becomes increasingly clear that Lia was connected to Maximilien Robespierre and several other supporting characters. Many royals, such as Empress Elizaveta of Russia, remembered and admired Lia.