Luise Marie Auguste von Baden, Elizabeth Alexeievna, Tzaritsa and Empress of All Russia, Duchess of Finland, Queen of Poland, Queen of Protogens. 

Also named Louise of Baden, she is a Protogen with light brown fur, dark blue LED eyes and mouth displayed on her visor face, pointed ears and a fluffy tail. 

Elizabeth Alexeievna was born in Karlsruhe, on 24 January [O.S. 13 January] 1779 as Princess Louise Maria Auguste of Baden of the House of Zähringen. She was the third of seven children of Charles Louis, Hereditary Prince of Baden, and his wife, Landgravine Amalie of Hesse-Darmstadt. At birth, the child was so small and weak that doctors feared that she would not live.

Louise grew up in a close, warm family environment. She would remain particularly attached to her mother, with whom she maintained an intimate correspondence until her death (the Margravine of Baden outlived her daughter). She received a thoughtful education at the Baden court. She spoke and wrote both in French and German; studied history, geography, philosophy, and French and German literature. Thanks to the close proximity between Baden and France, she was well acquainted with French culture and refinements, as was the custom of that era. Because her grandfather, the reigning margrave of Baden, was not rich, the family lived modestly by royal standards.

Catherine the Great was looking for a bride for her eldest grandson, the future Alexander I, and set her eyes on the princesses of Baden who were the nieces of Queen Frederica Louisa of Prussia and the deceased Grand Duchess Natalia Alexeievna (Wilhelmina Louisa of Hesse-Darmstadt) who had been the first spouse of Tsesarevich Paul. Thus, an alliance to Prussia and several German royal houses they were closely related to would be a beneficial outcome. After favorable impressions, Catherine invited Princess Louise and her younger sister Frederica, who later became Queen of Sweden, to Russia. In the autumn of 1792, the two sisters arrived in St. Petersburg.

The Princess learned Russian, converted to the Orthodox Church, took the title of Grand Duchess of Russia and traded the name Louise Maria Auguste for Elizabeth Alexeievna. The wedding took place on 28 September 1793. "It was a marriage between Psyche and Cupid", Catherine wrote to the Prince of Ligne.