After 1919, Gatsby dedicated himself to winning Daisy back, making her the single goal of all of his dreams and the main motivation behind his acquisition of immense wealth through criminal activity. To Gatsby, Daisy represents the paragon of perfection—she has the aura of charm, wealth, sophistication, grace, and aristocracy that he longed for as a child in North Dakota and that first attracted him to her. In reality, however, Daisy falls far short of Gatsby’s ideals. She is beautiful and charming, but also fickle, shallow, bored, and sardonic. Nick characterizes her as a careless person who smashes things up and then retreats behind her money. Daisy proves her real nature when she chooses Tom over Gatsby in Chapter 7, then allows Gatsby to take the blame for killing Myrtle Wilson even though she herself was driving the car. Finally, rather than attend Gatsby’s funeral, Daisy and Tom move away, leaving no forwarding address.
Like Zelda Fitzgerald, Daisy is in love with money, ease, and material luxury. She is capable of affection (she seems genuinely fond of Nick and occasionally seems to love Gatsby sincerely), but not of sustained loyalty or care. She is indifferent even to her own infant daughter, never discussing her and treating her as an afterthought when she is introduced in Chapter 7. In Fitzgerald’s conception of America in the 1920s, Daisy represents the amoral values of the aristocratic East Egg set.
Daisy is a trapped woman. She's trapped in a marriage that she is unhappy in and trapped in a world where she has no chance to be free or independent. She is at the mercy of her husband, a man who takes her for granted. Daisy is also terribly clever, delivering some of the funnier lines of the book. When a reader looks at the foolishness and shallowness of Daisy they must realize that Daisy may be doing out of necessity. As she said when she delivered her daughter, "- that's the best thing a girl can be in this world, a beautiful little fool". Daisy is smart enough to understand the limits imposed on her and has become jaded and indulgent because of them.
The word careless also describes Daisy well. Many of the things that Daisy does, the accident with Myrtle in particular, show a woman who is just careless. She has become very much wrapped up in herself. Part of this is due to the fact that she had been spoiled all her life. She was born into money and had an endless assortment of men who would continue to spoil her. So she has learned to think only of herself without regard for the people that it may hurt.