pulchitrude - physical appearance, comeliness.

Beauty is always subjective. One can find beauty while the other does not. When you hear it, what first comes to mind if the physique of a person. Would you want to get to know someone who was not appealing to begin with? Sometimes, physical appearances are used as stepping stones for friendship.

That being said, Yoon Hwirae knew why people never wanted to approach her. 

She wasn't beautiful, but her heart was. 

But who would dare venture a conversation with her?