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

Shprintze is Tevye and Golde's daughter. Over the course of the story, we learn that Shprintze has fallen in love with Ahronchik, a rich young man, who is completely dependent on his mother. When his family steps in to break up the proposed marriage, Shprintze takes her own life.