OMFG HE'S BACK!!! OMG >A<!!! OAO!!! That threw me off so badly. I was getting bored with the progression in Bleach cuz all they did was the battling and nothing new. And then all of a sudden, "he" shows up. Whether or not it's the hollow, shinigami, or just some look alike of that chara is not apparent at this point---all we know is he's working for Aizen. If you've been following Bleach, and get up to chapter 262, you'll see who it is.

*dies from shock* X_X