Originally Posted by Mimi-chan
Isshin issue always bothered me. Then I kinda forgot and u reminded me. Cos I've been always thinking that Kubo has some bugs in his story. Cos how come 20 years ago. Take Rukia she has been in Gotei 13 for 40 years(or 50). Isshin 99% was a captain he has a captain robe!! So she wolud definatly know him, and stilll she didn't have any reaction when she saw him. Maybe he was captain then quited, but he still was a shinigami on earth. then he met his wife and gave up his shinigami powers for the family sake. What d'ya think?
the thing is all we know is that Isshin has a Capt like robe but no where has it been said that he was a Captain in the Gotei 13, he could of been part of Central Room 47(?) or part of the royal guard or part of cover ops, by being in any of those rukia would of had zero way of knowing him or being in contact with him.
And the issue with Innoue, unless i am mistaken Aizen said that he wanted innoue because her powers would allow him to use the "thingy" and then revert it back to its fullest without waiting the "proper" cooldown time .