I think the new Ishida pic is of little shironeki the one that haise saw. Or some variation of that.
oooh I had considered that for a second too!
the only thing is though, the jawline looks quite defined and mature- probably a little bit too much to be Chibishiro
In the end, it will probably be revealed to be Kaneki with the black paint splashes across the eyes like Kaneki’s black tears (honestly, 90% of the time Ishida has a mystery character in his icon it ends up being Ken haha) but I would love if it was Hide too!