Final answer:
The question regarding Helena's reaction to Demetrius' complaints is based on William Shakespeare's 'A Midsummer Night's Dream' and not on the unrelated texts provided. In the play, Helena reacts with persistence and self-deprecation to Demetrius' rebuffs, displaying a complex portrayal of unrequited love.
Step-by-step explanation:
It seems that there is a misunderstanding regarding the text you have referenced for the question about Helena and Demetrius' relationship. The extracts provided do not pertain to the characters Helena and Demetrius.
Helena and Demetrius are characters in William Shakespeare's play A Midsummer Night's Dream, whereas the excerpts provided are from various different works and do not relate to the reactions between Helena and Demetrius.
In A Midsummer Night's Dream, when Demetrius complains about Helena's presence and affections, Helena remains persistent and even self-deprecating in her pursuit of his love. Despite his harsh rebukes, she continues to profess her love and loyalty to him, a dynamic that presents a nuanced exploration of unrequited love.