So, what I’ve been wondering, as we move through the Hueca Mundo arc in Bleach, is: did Aizen create the current culture we see among the arrancar, or did he just take it over?

(Spoilers ahead, of course.)

The fact that Hollows right up to Menos Grande are instinct and hunger driven has meant that the lower levels don’t have much in the way of organized culture or society.  Even the adjuchas seem to organize or group only in small bands, according to what we’ve seen of Grimmjow’s past.  But the arrancar are shown to have organization.  They are still driven by hunger, but they have regained enough mind and individuality to create as well as consume, at least by the witness of Las Noches.

So, is that something they have generated and constructed themselves, over however many thousands of years?  Or is that construction and organization something Aizen imposed?  The question doesn’t seem to me to have been answered one way or another, yet.  If Aizen has been in contact with them for the whole hundred or so years, then the progression we see among the Espada, the ex-Espada and elaborate ranking and numbering, could have been his instigation.  But perhaps not. It’s Aizen who adopts their manner of dress, and those things generally mean something in KT’s writing.

I’m really hoping we get some kind of indication one way or another, somewhere along the storyline.