In the chronicles of Dorothea Biehl, a personal friend of a member of the court, Anna Sofie Bülow, Louise von Plessen was described as quite intelligent, having educated herself by reading, and with great charm when she felt motivated to make herself liked, but also as haughty and domineering: proud over her learning, and with the view that her sexual virtue made her morally superior, she reportedly felt entitled to be judgmental.
[4] In August 1766, she somewhat reluctantly accepted the appointment of head lady-in-waiting or overhofmesterinde of the court of the new queen, Princess Caroline Matilda of Great Britain.
[3] When an official cautioned her for meddling in the intimate affairs of the royal couple, Louise von Plessen refused to listen and referred to the immoral lifestyle of the king.
[3] According to the agents of the king, Louise von Plessen informed the queen of all of his immoral acts both before and during marriage, which is thought to have made Caroline Matilda to find him repulsive; she also informed her of the sexual indiscretions of the ladies of the court, which is thought to have isolated the queen socially; and she also pressed to have the king's favorite Holck removed.
[3] Caroline Matilda was informed by a letter from the king given to her by Bernstorff, that he had dismissed Louise von Plessen because of the distance she created between them.
[3] Louise von Plessen was initially exiled to her estate Kokkedal, but then, as there was a fear of her influence, she was ordered to leave the country, and she settled in Celle, Germany, where she owned a property.
During his visit, his mother-in-law princess Augusta, upon the initiative of Caroline Matilda, asked him publicly during a dinner to reinstate von Plessen in her position.
[3] In the end, Louise von Plessen was not reinstated, and Augusta apparently asked Caroline Matilda not to press the matter and to show more affection to Christian.
The following year, when the queen was divorced and exiled to Celle, Caroline Matilda and Louise von Plessen reunited and resumed their friendship.