This originally started out as a post on the latest chapter, but it became much more complex, so I figured a separate thread was appropriate. As the title suggests, this contains massive spoilers, so only read further if you have caught up with the manga already.
Basically...is anyone else really worried that Kaiman is going to just disappear at the end of the manga? According to Nikaido's recent deduction, he's a product of Risu's curse magic and Ebisu's reptilian morphing magic mixed with Aikawa/Ai, correct? Though I have NO idea how Ebisu could have possibly been involved in Kaiman's creation in the first place. Unless there's something really important about her that has yet to be revealed. She is sort of an enigma if you really think about it. Anyway, if Ai dies...doesn't that mean Aikawa and Kaiman die along with him since they're all essentially one being?
Then again, Kaiman's abrupt return is a total enigma itself. It's obvious that his head that Shin severed a year prior was simply resurrected via some of Kikurage's smoke, then his body was revived via Noi's smoke. That's assuming it was done by a human or magic user of course. My personal theory is that a devil is responsible (perhaps the one that told Nikaido to retrieve the kitchen knife from Haru). A devil that's against Chidaruma's plans sounds like a very plausible development (Initiate "this ally was a devil all along" plot twist). I just don't understand how his old, severed head could bring him back as a separate entity from Ai since he grew a replacement shortly after and was Kaiman as we know him. He disappeared much further down the road after his encounter with En that made him transform in to Aikawa's personality. That version of Kaiman is the anomaly formed within Ai that basically acts as another personality that randomly assumes control; like Aikawa. So...what the Hell is this other Kaiman? Just another anomaly born from his severed head that retains his memories up to the head's severance? Wouldn't that mean you could just keep cutting his head off and making infinite copies of him? Or was that head regeneration ability just a part of Ai?
Regardless, I find it kind of disappointing that Kaiman has returned only just before everything is coming to an end. He was the main reason I initially became invested in the manga. I know he's basically a magical anomaly, but if he ends up disappearing, I'm going to be majorly let down. Him and Nikaido both deserve a good ending, and I seriously might end up hating this manga if they don't get one. Perhaps the change of publishers means the author plans on expanding even further. Though I don't know what else would come after the whole thing with Ai is resolved.