Adrian Mole and the Weapons of Mass Destruction joke in the book is that Adrian does not know whether Mr Carlton-Hayes' partner Leslie is a man or a woman; this is never made clear. Although they are from different backgrounds, he and Adrian share an appreciation of literature, contempt for Michael Flowers, and a similar reservation about expressing their feelings. It is revealed in that Leslie is a man and implied they both left their wives for their relationship. Pauline is Adrian's mother, and plays less of a role in the story than in previous books. Like Adrian, Pauline is inclined to spend using money she hasn't got.
Adrian Mole and the Weapons of Mass Destruction and emotionally unstable and a hypochondriac. She seems to always expect to get what she wants and proves to be manipulating Adrian. She even lies that she is pregnant with Adrian's child in a final attempt to make him marry her. At the end, however, she marries Bruce "Brainbox" Henderson. Daisy is Marigold's elder half-sister. She is the "black sheep" of the Flowers family, having embraced the materialistic lifestyle that they claim to renounce. She and Adrian are attracted to each other, and he eventually leaves Marigold in favour of her. Her father, Michael Flowers describes her as a Hedonist.