In "The Red Pyramid" by Rick Riordan, a character reflects on how much another character, Carter, has changed, emphasizing the surprise of growth and maturity. The quote highlights the humorous and often awkward reality of adolescence, where parents can switch from being affectionate supporters to sources of embarrassment in moments. This showcases the relatable dynamics between children and their parents during teenage years. The passage captures the essence of coming-of-age experiences, particularly the tension between growing independence and parental oversight. The mention of shaving and dating illustrates the significant milestones that mark the transition from childhood to adulthood, while also poking fun at the generational gap in understanding. Riordan effectively portrays the mixture of pride and embarrassment that often defines these relationships.