What details can you infer about Miss Brill from the quote "She had become really quite expert...talked round her"?

dannielly,

Katherine Mansfield's "Miss Brill" is a classic short story of a sympathetic protagonist who lives a life of loneliness. Because we experience the day’s happenings from the perspective of Miss Brill, we come to understand and to sympathize with the sweet old lady, even go along with her sudden view of herself as an actress in a play performed very Sunday. To an intense degree we share her dismay and hurt when she overhears herself called a “stupid old thing” and her furpiece ridiculed as “exactly like a fried whiting.”

Because she lives on the fringes of life in her small French town, Miss Brill regards her solitary Sundays in the park as the highlight of her week. Here, watching the people who
come and go and eavesdropping on their conversations, she feels a connection with her fellow human beings. The smallest details about them excite her interest.

She comes to feel herself one of them, an actor in life’s drama. So caught up does she become in the sudden revelation that all the world’s a stage and that she, like everyone else, has a part to play, that she has a mystical experience. In her mind, she merges with the other players, and “it seemed to Miss Brill that in another moment all of them, all the whole company, would begin singing” (Chapter10).