I think that the Ape Titan may be Grisha, honestly. Ape titan's inteligance, ambiguity, and even appearance kinda just reminds me of Grisha. It wouldn't supprise me if that's what actually happens later on...
I've never been this anxious for a manga chapter. I think it's going to be either really bad or really cool, though obviously feelsy. Irwin's my baby and I'm going to cry no matter what happens to him ^_^; Ugh...The wait is killing me