Talk:Arata Kirishima/@comment-75.69.15.57-20141216042131/@comment-10733658-20141221070849

Since we never saw him actually fight, there's really no way to estimate that. However, it seems his other nickname was "Invincible Body" so likely he was pretty darn powerful.

He was also defeated by Mado and Shinohara, who were both established to be incredibly skilled Investigators.

Kaneki slicing through the armor doesn't necessarily mean much, since Rinkaku > Koukaku. We also don't know how the armors stack up to Arata himself, since it seems like Quinque aren't necessarily as strong as the actual Ghouls themselves.

Personally, I think should the theory about Arata still being alive turn out to be true, he's probably an SSS-rated and imprisoned in the lowest levels of the prison.