User blog comment:Xilinoc/Ch. 574 DEATH IN VISION/@comment-2211792-20140326135532/@comment-2211792-20140327073934

Gremmy is the one who makes his imagination into reality, not Yachiru. As for those Shinigami, they never heard anything Gremmy was saying. They saw the fortress, sensed reiatsu, realized it's Kenpachi's and then wondered why they only sensed it now.