What are some characteristics about Sarny from Nightjohn?

Sarny was a young slave girl who was separated from her mother when she was four years old. She was raised by old Delie, or “Mammy,” who worked for Mr. Waller, the slave owner. Sarny was a quiet but intuitive child. People thought she was dumb, but she listened, and she was aware of the things that were happening around her. Sarny was smart and learned how to read quite fast. Earlier, she figured out what reading was from the slave owners, but when she attempted writing, Mammy warned her of dire consequences. The girl was also rebellious because, in spite of Mammy’s reprimands, she still learned the alphabet and spellings from Nightjohn. Sarny was also determined and continued to practice what she had learned even after Nightjohn escaped. She also displayed considerable courage when she agreed to attend and help Nightjohn teach other slaves how to read.