Officers of the Blue Star, known as OBS, were a law enforcement agency in Barzo that was formed in the beginning of the 16th CSR. They became one of the major participants of the war against banditry in the area and were generally considered instrumental in reducing gang activity, although many researchers believe that their methods made them as dangerous to normal citizens as the gangs themselves.

OBS was dissolved in 1567 SR, but its insignia, principles and methods have strongly influenced law enforcement across several countries, including the confederation of Darda.