User blog comment:Xilinoc/Ch. 569 (You've been hit by / You've been struck by / Senbonzakura~)/@comment-1268838-20140219122040/@comment-11051098-20140221210535

Still, that doesn't explain how he could inflict fear in Byakuya and Rukia, if he fails to do that now because he doesn't know what "fear" is to start with. If that was true, then he shouldn't have been able to make them feel fear in the first place.