Aurora Wilhelmina Brahe

In 1802, Koskull is noted as an accomplished singer in the performances staged by the amateur theatre society of Princess Charlotte at Rosersberg Palace.

During the visit of Prince William Frederick in Stockholm during the winter of 1802–03, there were rumours of an affair between them, which was mentioned in the diary of Princess Charlotte: Being without a dowry, it was difficult for Koskull to marry.

In 1810, she attracted the attention of the elected Crown Prince Jean-Baptiste Bernadotte, the future Charles XIV John of Sweden, who was reportedly in love with her and courted her.

There were rumours of an affair between them, but these are not regarded to be true, and instead Charles John was reportedly rejected by her and instead entered in to a relationship with her relative, Mariana Koskull.

In June 1815, the matter was mentioned in the famous journal of queen Charlotte: Not soon after, there was a rumour that Brahe had supplanted her cousin Koskull as the lover of the crown prince: In June 1817, queen Charlotte summarized the difference of the crown prince's relationship toward the two cousins, while also giving Brahe a personal description: In 1823, she was offered the position of head lady-in-waiting to the new crown princess, Josephine of Leuchtenberg, upon her arrival to Sweden, being at that time one of the leading women of court life and high society; she refused and the office was instead given to Elisabet Charlotta Piper, but she did accept to have the position temporary, by meeting Josephine in Germany and escorting her the last part of the journey to Sweden: Brahe was a leading figure of the aristocratic life of Stockholm, a position she kept after having been a widowed in 1826.