Sonya, the Professor's daughter by his first wife, who has worked with Vanya to keep the estate going, meanwhile suffers from the awareness of her own lack of beauty and from her unrequited feelings for Dr. Astrov.
Sonya meanwhile suffers from the awareness of her own lack of beauty and from her unrequited feelings for Dr. Astrov. Sonya is the Professor's daughter by his first wife. His first wife has worked with Vanya. This was to keep the estate going.