User blog comment:Xilinoc/Ch. 543 - Letters/@comment-10371091-20130629150214

Another question raised is, where do Quincy go when they die? Or die from the blade of a zanpokto? We see that the fullbringers have returned and are in the Soul Society safe and sound, but do they have still have their powers? If they do, should we consider that a Quincy's soul is also sent to the Soul Society with their powers intact? Ealier in the arc Mayuri describes the Sternritter as rebels or ryoka. So it could be true that when a Quincy dies, he or she is sent to the Soul Society unable to use their power, but ever since Juha has stolen the power of the Gemischt Quincy, the Quincy's powers in the Soul Society were reestablished/awakened because after all, Juha's blood runs through their veins.