User blog comment:Lia Schiffer/390: Beyond The Death Understanding/@comment-1854361-20100129185502

In my opinion the only people who can take on aizen in a even fight are: Head-Captain Yamamoto, Shunsui Kyōraku, Jūshirō Ukitake (aside from his disease), Shinji Hirako, Kisuke Urahara, Yoruichi Shihōin, Tessai Tsukabishi, Isshin Kurosaki, Ryūken Ishida, and maybe last but not least Retsu Unohana.