I think Marie will be a fabulous princess. Being French, polished, assured, and from a good family, she will fit right in.
She will know she's very lucky NOT to be the Crown Princess - she'll have more freedom, fewer duties - and she'll actually be wealthier than Mary.
She has the advantage of already having a second language, so she will probably learn Danish more quickly than Mary.
She is blessed to have such an utterly delightful ally in Alex, who is sure to smooth the path for her.
She is also blessed to be step-parent to two incredibly gorgeous, princely boys ...
Aotearoagal