Hinami's got the right idea! Even if Haise doesn't remember him being Kaneki, he still protects like when he was Kaneki. I think he still has the essence of our beloved protagonist, so I think eventually Haise and Kaneki will blend and coexist. He just needs to defeat his inner demon first lol, insane Kaneki.
These guys go pretty far to get their ukes, eh?
I still think the two rich guys are experimenting on the ukes. Look at the four of them sitting at the science table. Check the interactions between semes.