Marianela frequently sings to Pablo, and he believes she is beautiful because of her voice and wild yet intelligible imagination.
When Florentina is out walking with Pablo and Marianela, she expresses her pity for Nela because she is poor, abandoned and nobody loves her.
Nela attempts suicide because she knows that now she is of no use, since Pablo has the ability to see and differentiate between beautiful and ugly, but she is saved by Dr. Golfín.
He then has his attention drawn to Don Teodoro and Nela on the sofa and confuses her for "just a poor girl who Florentina took in from the street."
The story contrasts their psychological analysis with a detailed description of nature, as an examination of the complexity of the world and its beauty.
In 2018, Sri Lankan director Bennett Rathnayake directed the film Nela as an adaptation of the novel.