Originally Posted by dschizo
The only reason I can think of that she wouldn't have recognized him is the he may have been captain of squad 0, the Royal Guard, or maybe even some more secretiv branch than that which we don't know of yet. Also it's possible that everyone in SS was made to forget about him through Kidou.
Another thing that just occured to me is that he could've faked his death and hidden in the human world to start a family, completely giving up his Shinigami powers. If Rukia had recognized him in that case, it may have been brushed off as coincidence.
Make sense. Especially about squad 0. For dome reason I totaly forgot about it.Will see which is it in near future I hope.