Final answer:
Berniece Charles from 'The Piano Lesson' changes from a grieving widow to a strong protector of her family's legacy, which is depicted through her interactions with the family piano.
Step-by-step explanation:
In August Wilson's play The Piano Lesson, the character of Berniece Charles undergoes significant development. Initially, Berniece is portrayed as deeply mourning her late husband and is resistant to change, particularly regarding the fate of the family's piano, which is a repository of family history and the subject of the play's central conflict. As the play progresses, however, Berniece's character evolves after she comes to understand the piano's importance beyond its monetary value: it symbolizes the family's journey and sacrifices.
By the end of the play, Berniece exhibits strength and takes on the role of the protector of her family's legacy. This is exemplified in the climax when she plays the piano, calling on the spirits of her ancestors to banish the ghost of Sutter, thereby embracing her family's history. This scene demonstrates her acceptance of the past, which enables her to confront the present and take an active role in the legacy inherited from her ancestors.
Textual evidence that supports this change includes Berniece's initial reluctance to even speak about the piano ("I ain't gonna sit up here and argue with you about the worth of a piano."), juxtaposed with her assertive declaration at the end of the play ("You can’t sell your soul for money. It’s as simple as that"). Through these events, Berniece transforms from a grieving widow unable to engage with her legacy, to a strong, determined woman, fully aware of her heritage and its significance.