Bannon is a minor character in the novel. He is an associate of Mulligan's. Buck Mulligan mentions him in the Episode 1, and then he appears later in "Oxen of the Sun." Bannon has met Milly Bloom in Westmeath, and brags of how they are dating and how he could have slept with her if he had brought protection. Bannon plans to buy condoms while in Dublin. At Burke's pub, when he realizes that Bloom is Milly's father, he slinks off.