Well...Missy wrote that her eldest daughter had beautiful features (most certainly Georgie of Greece thinks so too if not he would not have persue her until she agrees to marry him). However I agree she was not graceful nor elegant.
The biographers of Marie of Romania, however, agree to say that Elizabeth, child and adolescent, was very beautiful. Some, like Guy Gauthier even claim that she " was beautiful as a princess in a fairy tale." This is not my opinion. I think rather that Mignon was the prettiest girls.
Here Elisabeta as Queen of Greece :
