Luna was the girl and 3rd main character in the story. She was the one the started all 4 robberies and problems. She stole all the items in story. Their problem was stealing. The item she stole had a common origin, they were made by same person(Lafayette). That one reason was why she got caught at the end of the book and learned her lesson.
Luna stole 4 items, George Washington Miniature, Hamilton Ring, A Lafayette Book, and a Lafayette Jar.