A cunning and deadly spy employed by Cardinal Richelieu to smuggle a secret treaty to England's Duke of Buckingham. She infiltrates the King's circle, initially capturing and attempting to seduce d'Artagnan before plotting his murder. Her past as a murderer is exposed by Athos, leading to her death sentence. Before being executed, she warns the musketeers of the assassination plot and commits suicide by leaping from a cliff.
Milady acts as Richelieu's covert operative.
Richelieu tasks Milady with delivering a secret treaty to England as part of his conspiracy.
Their former marriage makes the political conflict intensely personal.
Athos reveals that Milady was his first wife and that he exposed her after discovering she had been branded a murderer.
Their encounter moves from deception to an attempted murder.
Milady finds D'Artagnan exhausted, attempts to seduce him, and then tries to kill him after learning of his plans.
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Related entry on Wikidata (Q507978), public domain (CC0).