Talk:Yakumo Oomori/@comment-62.212.37.94-20170127032942/@comment-10733658-20170127033452

His official rating is S. We don't know why certain ghouls are given lower or higher ratings. There's a huge range of ability in the S and SS rankings.

It also isn't just raw strength, it's also other factors that makes the CCG consider them a risk.

Notice, though, that Aogiri didn't attack until the senior staff was out.