What is Daisy Buchanan's background?

The reader knows about Daisy from Jordan Baker's recollections, as Jordan grew up with her. Daisy, whose maiden name was Fay, grew up in Louisville, where she was a very popular young woman, around 1917. She drove a little white roadster, and the officers from Camp Taylor constantly called her and asked her out. One of these officers was Jay Gatsby.
Daisy was the subject of rumors—for example, that her mother had found her packing to go to New York to bid farewell to a soldier who was going overseas. This incident caused Daisy not to be on speaking terms with her family for a while and to only date men who weren't in the military. After the end of the war, she had a debut, and she eventually married Tom Buchanan in a lavish ceremony. On the day of Daisy's wedding, Jordan found her drunk and in tears. Daisy was clutching a letter in one hand (which she even took into the bath with her until it disintegrated) and the very expensive pearl necklace Tom had given her in the other. Ultimately, Daisy's wealthy and constricted upbringing greatly affected her life as an adult.