Quite a revealing chapter.
So the ninja girl was Nanao's zanpaktu all along, makes me look at that filler episode when they bond in a whole different light.
And let me guess the kumono and Shunsei old girl friends was Nanao's mother, not surprised a lot of people was theorist on that one.
Still a great chapter, great to see the ninja girl again, though knowing what I know now, makes Shunsei flirting with Nanao kind of creepy.