I have a question.Was it ever revealed in the manga who cut off Aura’s aunt’s leg? Was it actually Kaneki? (Maybe I missed that part.)
I think it's safe to assume it was Kaneki.
Kaneki shows up in full attack mode on Kiyoko and Mougen and the fight cuts here.
Kiyoko never denies that Kaneki did it.
I think people started speculating because of Kiyoko's switch-up. She went from despising ghouls to asking Shinsanpei to not hold hatred for Kaneki, despite suffering such an injury by him. Makes you wonder if something else happened off-screen to make her soften.
Also if Kaneki really had done that, you'd expect that harming one of the investigators to this degree would've affected him somehow and be brought up again, but his perspective on this is never brought up.
Still, not enough reason to believe it wasn't Kaneki's doing, at least in my opinion.








