Who stood up to the duke against his wrong doings on Bach's behalf in the movie Bach's fight for freedom?

In the movie "Bach's Fight for Freedom," it was Anna Magdalena, Bach's wife, who stood up to the duke against his wrongdoings on Bach's behalf. She fiercely defended her husband's artistic integrity and fought for his freedom to compose music without interference. Her unwavering support and determination played a crucial role in challenging the duke's authority and advocating for Bach's rights as a composer.