User blog comment:Soulreaper1234/Who should fittingly kills Aizen in the end?/@comment-1982694-20100603180407

I think the best one for the job would be Kisuke since he's the only one smart enough to handle Aizen. But realistically speaking(Not that bleach is realistic), I think the only ones with enough raw power are Ichigo or Isshin. And Ichigo doesn't have control over his raw power, so that leaves Isshin. I would say Kisuke if he was willing to use his bankai, or Yoruichi if she brought her zanpaktou. But neither case is true, so Isshin.