User blog comment:Xilinoc/Ch. 585 - The Headless Star 4/@comment-26420452-20140618101046/@comment-24153155-20140618143453

Still, unless they wear some "sub-type" clothing, all 4 of them must be (wearing) a King's Key. Was just thinking... would it be that all 4 of them can migrate between the Soul Palace and the Seireitei just at will? I guess that would be logic...