Damas's half-sister and the true mastermind behind the murders. Bitter about being unloved and seeking her father's inheritance, she secretly injects the five victims with curare and uses charcoal to simulate plague symptoms on their skin.
Marie and Damas are half-siblings connected by their father's legacy.
The plot identifies Marie as Damas's half-sister. Damas is the son who inherited their father's fortune.
Explore the full interactive character relationship map of Have Mercy on Us All