User blog comment:StonerCatJay/Rereading the series- theories and speculation/@comment-5551986-20140523175052/@comment-24963493-20140524053628

I agree that he's the same as Shunsui and Ukitake, my theory was just based off the fact that one of them was a Quincy spirit, while I'm fairly certain the other two have two zanpakuto spirits residing within them (even though that arc was non-canon I've heard that Kubo had at least some influence on what occurred in the arc, and the double spirits seemed to be in line with what we've learned and heard about their zanpakutos within the manga).