User blog comment:Xilinoc/Ch. 655 - THE MIRACLE/@comment-24769684-20151210165435/@comment-11293956-20151212035509

Kisuke is off somewhere being a sneaky sneak. He's probably setting up traps or studying Gerard's power. Kisuke does have that one technique that lets him completely negate an opponent's attack so studying Gerard's moves is a big possibility.

Or maybe Kubo forgot that Kisuke was with the group instead of Byakuya (cuz he kinda appeared out of nowhere last chapter).