Who is Hodl from Tevye the Dairyman and the Railroad Stories and what is their importance?

Hodl is Tevye's second eldest daughter, who is intellectual and reads a lot. She is the star pupil of the tutor Peppercorn. They decide to marry. Hodl marries Peppercorn even though she knows he is going to jail and then to Siberia. She follows her husband in exile to Siberia.