How does Daisy affect other people?

Daisy is captivating and magnetic, and people want to be near her as a result of her charm and beauty. Nick says of her, at their first meeting after several years, that she has

[...] the kind of voice that the ear follows up and down, as if each speech is an arrangement of notes that will never be played again. Her face was sad and lovely with bright things in it, bright eyes and a bright passionate mouth, but there was an excitement in her voice that men who had cared for her found difficult to forget: a singing compulsion, a whispered "Listen," a promise that she had done gay, exciting things just a while since and that there were gay, exciting things hovering in the next hour.

She is attractive in almost every way; even her voice has a particular beautiful quality to it that draws people in. She seems to convey an excitement that inspires people to listen closely to her, to want to get closer to her. Her voice seems to suggest that she has been having fun quite recently and that she is going to be having fun again soon and that her hearers can partake of that fun themselves by remaining near her. Daisy even makes Nick feel as though he is the person she most wanted to speak to in these moments. She makes people feel like they can share in her good fortune and liveliness and vivacity.

Daisy is shown to be very alluring to the other characters. In the scene in which she is first introduced, she laughs "an absurd, charming little laugh, and I [Nick] laughed too." In this instance, Daisy is depicted as someone with an infectious charm, as evidenced by Nick's inclination to laugh with her despite the lack of dialogue between the two characters. Daisy's charms prove to be very alluring, for she is loved both by Gatsby and her husband, Tom Buchanan. While Tom did partake in an extramarital affair, he is shown to care for Daisy by his efforts to keep her away from Gatsby. And in Gatsby's case, the elaborate and expensive parties that he hosts are eventually explained to have been concocted solely for the purpose of coming into contact with Daisy after having been estranged for a number of years. Gatsby's rabid and enduring devotion to Daisy establishes her as a prize of sorts—a prize over which both Tom and Gatsby both compete throughout the novel.