User blog comment:Xilinoc/Ch. 667 - BIGGER, LOUDER, STRONGER/@comment-1268838-20160324141036

Byakuya's second remark puzzles me a bit, since he already knows exactly one other person with a constantly-released Shikai... unless Kubo is trying to insinuate something strange. Anyway, I have a feeling we'll be learning what happened to Yachiru this chapter or the next.