I think it would be helpful for Margot not to add to a chorus. I found her attacks tiresome. I may have to report her for "personal" attacks.
The point is that Dagmar and Thyra resembled each other period. Xenia was always praised as the pretty one (Olga being the plain one that resembled her father Tsar Alexander III) and the image of the young Dagmar. But do remember through portraits do flatter, and some photos of Thyra after her illness showed her to be quite plain. In fact Queen Victoria was not very excited about Thyra's looks when her son Arthur (later Duke of Connaught) took an interest in her. When she heard that Thrya married Ernst of Hannover (Duke of Cumberland), she referred to them as a "very plain couple".