The eleventh division of the Gotei 13 is a very specialized division, led by the Arrancar commander. Its main focus is on developing technology and spiritual tools, while also performing research on the field and still pursuining the main Gotei 13 duties. The division is home to the Research and Development institude, led by the captain of the division. The technology is also used to monitor both the officers and the Human World and keep track of hollows and other dangers. Due to the delicate nature of this division, extensive background checks are done on anyone who wishes to enter the division, and its barracks are mostly off limits for external reapers, unless explecitly invited and with the exception of the Head Captain and Deputy Head Captain.
The Research and Development Institute is organized in three different units:
- Reinō Spiritual Ability Research Department: They create the tools and weapons of Soul Reapers, and also conduct research and experiments in other fields. The members of this unit are encouraged to bring new ideas to the table and help in everything they need to obtain the desired result, the resources of the SRDI are immense.
- Spiritual Wave Measurement Lab:The technicians monitor the world of the living to ensure spiritual stability. Their responsibilities extend to monitoring the Seireitei from the surveillance room.
- ommunications Research Section: The technicians oversee transmissions between the Human World and the Soul Society, or from the Soul Society. They are vital, as they are the link between the Soul Society and all the Soul Reapers in a mission.
In addition to the R&D institute, the division also has a task force and a security operation group, which is extremely elite.
The 12th Division barracks are divided in two main areas: the surface, home of the task force and the security operation group, and the underground, where the R&D Institute is. The surface has also all the dormitory and leasure spaces for the 12th division officers, including a renown canteen with delicious food open all day.