How does the author's use of the word "nice" to describe such varied persons and objects as Sir Galaad, the Holy Grail, a piece of liver, the sword Balmung, the Philosopher's Stone, and Myron and Bernice's engagement affect the perception of these objects and people?

The word emphasizes that these things are all normal.

Explanation:

Chivalry is a short story written by Neil Gaiman. The story surrounds Mrs. Whitaker, who buys the Holy Grail from a secondhand shop.

In the story, the author has used word 'nice' to describe various people and objects such as Sir Galaad, the Holy Grail, a piece of liver, the Sword Balmung, the Philosopher's Stone, etc. Using the word repeatedly emphasizes that these objects were all normal to people in the story.

The word makes perceive these objects and people normal instead of it's extraordinarility. The Holy Grail is the cup in which Jesus Christ took the Lord's Supper with His disciple, but calling it 'nice' instead of perceiving it extraordinary, the term dictates that these things were perceived to be normal.

because each is self-sufficient.  

3 is blunder, i’m not sure about the last one but the first two look correct