User blog comment:Hollowbankai/grimmjow and ichigo/@comment-1932702-20100427101913

Yeah well that's cuz they weren't FATALLY injured. I mean, they were pretty much fine and given enough time they could return to fight. But Ichigo has this thing against killing your own subordinates (anyone remember Kariya and Ichinose??). He'd go overboard if Aizen killed off Grimmjow and frankly, so would I. Heck, I wouldn't be surprised if Hollow Ichigo surfaces due to pure rage and rips the Hogyoku right out of Aizen's chest or atleast burn him with a super-powerful Getsuga or something.