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The heroine, who lived a very Cinderella life. Having spent her life being called ugly and stupid, Marie is frustratingly unable to understand that Anastasia was never whom Kyros wished to marry; even when he states to her face that he got their names wrong because of her poor wording. She is meek around others and tries to conform to what she thinks is appropriate, which only makes things worse for her; everyone at Kyros's estate cannot figure out what she likes in order to help her adjust better. However, as she spends more time free of her parents' abuse, Marie begins to discover how much she enjoys being free to choose.
In truth, she has been running her family's estate due to her father being too much of an imbecile. All the abuse she suffered was to keep Marie from ever desiring to leave after seeing just how bad a shape her home was in.[source]https://en.wikipedia.org/wiki/Betrothed_to_My_Sister's_Ex#Characters[/source]