Leopold Bloom is a protagonist and hero in Joyce's Ulysses. His peregrinations and encounters in Dublin on 16 June 1904 mirror, on a more mundane and intimate scale, those of Ulysses/Odysseus in Homer's epic poem the Odyssey. The character was inspired by James Joyce's close friend, Aron Ettore Schmitz (Italo Svevo), author of Zeno's Conscience.
Molly Bloom, the wife of main character Leopold Bloom, she roughly corresponds to Penelope in the Odyssey. The major difference between Molly and Penelope is that while Penelope is eternally faithful, Molly is not.
Stephen Dedalus is James Joyce's literary alter ego, appearing as the protagonist and antihero of his first, semi-autobiographical novel of artistic existence A Portrait of the Artist as a Young Man and an important character in Joyce's Ulysses. Stephen Dedalus appears in Ulysses as the character who corresponds to Telemachus; less overtly, he embodies aspects of Hamlet. He is the protagonist of the first three chapters. Subsequently
Leopold Bloom is introduced, and Stephen's interactions with Bloom and his wife, Molly, form much of the final chapters' substance. More: List of Ulysses characters - Wikipedia, the free encyclopedia
Ulysses (novel) - Wikipedia, the free encyclopedia