Gotei 13

The Gotei 13 (護廷十三隊, Goteijūsantai; 13 Division Imperial Guards, 13 Court Guard Squads in the English dub) is the organization which most Shinigami join, and one of the three main branches of military in Soul Society. It is split into thirteen divisions (hence the name), with several divisions having certain specializations. The Gotei 13 is subservient to the edicts of the Central 46 Chambers.