The crossword solution for the term 'On the Beach Heroine' is MOIRA, a 5-letter word. MOIRA is the main character in the 1959 novel On the Beach by Nevil Shute. She is a young Australian woman who is struggling to come to terms with the aftermath of a nuclear war that has wiped out most of humanity. MOIRA is a strong and determined character who is determined to make the best of her situation despite the bleakness of her circumstances.