Molly Bloom is one of three main characters in the novel. Not the only one prototype of Bloom's wife is Norah, who is the wife of Joyce. At the same time, in order to create the image of the new Penelope, Joyce emphasizes the feminine origin in the image, substantially modifies both, the external and internal features of Nora.
Molly Bloom, unlike Nora, is not fear with her husband (it prevents him from treating his wife with adoration and lust), she is a singer with a southern appearance and southern temperament. In essence, Molly Bloom's participation in the novel is limited to the final episode of Penelope, a kind of epilogue that represents the multi-page "stream of consciousness" of a woman in love, which consists of only eight phrases and begins and ends with the word "yes." In this case, Molly bloom represents herself not only as the new Penelope but as the ‘Woman” in general, the personification of the female nature in all its entirety.
Molly Bloom is the image of a new Penelope, a singer with a southern temperament and appearance, beloved by his husband, but, at the same time, betraying him. This is not a specific image in the novel, but the image of a Woman in general, the embodiment of a woman's nature. Each woman has an internal state with which she appears in a front her husband. And it doesn’t matter what role he plays: whether it's a husband or a friend, a lover, a fan, and so on. In the final episode, where the main scene with her participation is given, she, a woman in love, utters a short monologue about love, entirely consisting of repeats of the word "yes."
It’s believed that the prototype of Molly Bloom is the writer's wife, but with a changed appearance and character.
Molly Bloom in the Essays