I do not really understand this question. Perhaps you can clarify it. There is no way that Miss Emily Grierson is a black person in this story.
We can know that Miss Emily is not a black person because of the way that other people in the society treat her. We are told that she is one of the "august names" in the society of her town. A black person would not be.
We are shown cases where the powerful people in her town come and act very respectful towards her. They would never have treated a black person like this -- asking her to pay taxes and just leaving when she refuses, for example.
I agree with the previous editor. Miss Emily's father was a Captain in the confederate. She has had the high regard of her town's people for many years. Had she been black her life during the time of her youth would have been very different.
Now if Miss Emily were a black woman it would stand to reason that the townspeople would have been very suspicious of her. They would not have gone to her home to remove her dead father. They would have called upon the black community. When she went to purchase the poison they would sent someone to investigate. Unfortunately, the south was a very different place for black people.
"Example of a black woman was treated in the story "—he who fathered the edict that no Negro woman should appear on the streets without an apron."
Even Homer would not have given Miss Emily the time of day had she been black because this is how he sopke of black people in the story.
"The little boys would follow in groups to hear him cuss the niggers, and the niggers singing in time to the rise and fall of picks."
I stand corrected, I am a foreign lanuguage learner, and I missed the points you mentioned while I was reading this story
I read somewhere the negro in this story has the connotation of death, the servant misled me somehow