Character
Mary Sioux
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Character
She is the sole daughter of [Anson Sioux](https://anilist.co/character/135048). ~!Mary Sioux is one of the main antagonists of the series, the ultimate rival and the tool used by [Being X](https://anilist.co/character/135044) in order to stabilize a neutral war against [Tanya Degurechaff](https://anilist.co/character/121052). After her father's death, she became rather more vengeful and serious. Her hatred grows when she hears the name "Devil of the Rhine," she will begin to β¦
