She changed Europe

I am Gisela Louise Marie, daughter of Emperor Joseph and Empress Elisabeth, a noble princess of the Austro-Hungarian Empire, and heir to the Habsburg-Lorraine dynasty.
Everyone says the Habsburgs are doomed, but I just want to say: Impossible, absolutely impossible! This world has magic, science, and farming; how could we possibly be finished?!
The ministers: Yes, yes, yes! Let others go to war, you, happy Austria, go get married! What Mars, the god of war, gives to others, Venus, the goddess of love, will give to you.
A magical anthropomorphic history: Germany and Austria cannot merge, but it doesn't say they can't unite!