Artist Wrote:The idea is that Adrien makes up rubbish stories about the figures that Marinette has drawn in her sketchbook. Just like making up random back stories to make Marinette laugh. He eventually makes up a heroine character and some of the other figures in the book become her friends or rogues gallery. Even when not around Marinette, he’s writing down ideas for these characters and their stories. Eventually dumping an entire note book filled with essentially fan fiction about Marinette’s sketchbook.