Princess Katralla was the heir to Empress Novia of the Breakaway Colonies. As the anniversary of her birth approached, Katralla was expected to choose a compatible suitor whom she could marry and rule beside when she took the throne. While at a party she was testing the male Sebaceans with a liquid that would provide information on whether the male and female are compatible to bear a child, however Scarran envoy Cargn was plotting to make sure that she would be unable to bear a child with another Sebacaen, thus meaning that she would not become empress and the title would instead go to her brother Prince Clavor. Unfortunately for Cargn, Katralla used this liquid on recent arrival John Crichton and when they kissed Katralla found out that she and Crichton were compatible to reproduce. Throu