orz i didn't mean for it to come out like that, i apologize. Unfortunately even if he's just stashed away, it won't make the plot more focused.

It doesn't really matter what the filler plot is, Byakuya's focus is away from his assassin on Ggio and Ichigo sadly. Ggio can't just hide away - he's now on the Soul Society blip. They may be bureaucratic, but they're not morons. 8( It would be OOC for Byakuya not to take action on it. Even if Mashiro reveals herself.

I hope that explains the current situation?