The Espada, the elite Arrancar, all meet here. Since Nelliel is the Primera, she controls the whole situation. Anyone who has the power to with stand all the pressure from such high leveled Arrancar. Or, you've been allowed, which would mean you've been taken in by one of the Espada. http://i25.servimg.com/u/f25/12/95/00...
http://i25.servimg.com/u/f25/12/95/00...