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Significant plot details follow.
The Chevaliers Diabolique is the army that is in service under their leader, Napoleon Bonaparte in Rhythm Thief and the Emperor's Treasure. They are vast in numbers and faithful only to Napoleon in his quest to reconquer the world. They are frequently encountered in the story.
Chapter 1: Chance EncounterEdit
They are seen following Napoleon in his attempt to kidnap Marie.
Chapter 2: On the Trail of the MarkEdit
Chapter 3: The Darkness of Les InvalidesEdit
Chapter 6: Intrigue in the ShadowsEdit
Chapter 7: Saving MarieEdit
Chapter 8: Marie's SecretEdit
Chapter 9: Weapon in the CloudsEdit