The Existence of the Secret Organization

Map #260000000 is famous for producing Item #4011008, but the people of Map #260000000 don't seem to be wealthy, and that's because of the queen... Maybe Sirin, who dances in the middle of the town, knows a thing or two about the queen.

When I asked Sirin about the queen, she started complaining about the queen's lack of humanity, and mentioned Sand Bandits in the process. Apparently, Sand Bandits steal the treasures of the greedy queen and give them to the struggling folks in this town, all done in a secretive manner. A good thief? Not bad. When I told her I was interested in joining Sand Bandits, Sirin thought about it for a while and told me if I can find the wall that has something written about Sand Bandits, then I may be able to find them. I better find the wall and then return to Sirin.

I found the wall that had the symbolism of Sand Bandits written on. When I looked closer, there seems to be a clue on the Sand Bandits... A dagger, an iron hammer, a bow, an arrow? What does that mean?