Board Thread:Spoilers!/@comment-1916997-20161114025242/@comment-1894786-20161114191301

Well... A huge theory surrounding Mulan's Disney self is that she herself was the Great Stone Dragon that Mushu was sent to awaken. Her Once self not only being Mushu's daughter but also a dragon herself would be a nice nod to that theory. It could just be that only the children of two dragons (or a child who was laid in an egg like Lily) can become a dragon, and Mulan just wasn't given the Dragon gene.