These numbers are the only identifiers given to the other boys in the chief's gang. All of these boys come from wealthy families and are top students in their class. The amount of “perfection” in their lives is what drives the boys into the open arms of the chief's teachings. As is typical of wealthy families, the boys’ parents are rarely home and the large houses in which they live are cold and empty. The only attention they get from adults is from teachers praising their work and adults who love kids. Neither of these interactions come off as genuine, leading the boys to believe that there is no meaning in the world. Believing there is no meaning causes the boys to become cold and harsh. This then allows them to find atrocities, such as the murder of the kitten and Ryuji, beautiful. In addition to not believing there is meaning in the world, the chief is the first person in a position of authority that actually pays attention to the boys, which then makes it easier for them to accept his teachings.