A thief! A festival crowd like that is probably great for pickpockets. I was pickpocketed once. During a school trip my friend and I had just bought make-it-yourself necklaces, each with one of my characters’ names in beads. We each had favorites back then. I was holding it in its bag while we watched the big event going on. After a while I noticed that not only was my necklace gone, but the bag I was holding too, hah.