Who is Daiyun from The Examination and what is their importance?

Daiyun is the daughter of a wealthy family the the home village of Hong and Chen. She has undergone the traditional practice of having her feet bound as a child, keeping them small. This is done to show that the girl is wealthy and never expected to do any hard work. Chen entertains the idea of remaining in his village and marrying Daiyun, but is ultimately drawn to leave the village and pursue his academic career.