Kai

The last chapter we saw of Kai was chapter 28. We only saw that he's still in jail but met a new ajin, Takeshi Kotobuki whi had an IBM that has wings. Meaning that if Kai wanted to get out, he could help him. Whether he did or not is yet unknown though in my opinion that Kai did get out. We had another chapter with Kai but that was a dream of Kei really, still visioning Kai as his safe net though what chapter that was I don't remember.

Pretty much all we know of Kai is that he's in jail with a change to get out of it. How he's gonna add to the story and his reunion with Kei are something I am excited for.