Originally Posted by
MFauli
Well, there´s one more possibility (if you can call it that) that would also incorporate the 10 years jump.
In the episode where we got to see the imprisoned queerrat queen, we speculated about this kind of control over a superior being. That there might even be a clue to how he, Yakomaru, might gain control over a human being/Cantus user in the future. So, maybe, just maybe, Yakomaru indeed successfully turned the experience of controlling a queen into something that let him control a human. I mean, if this anime decides to become truly fucked up, maybe we´ll get to see Maria kept captive in some dark hole, put in chains agianst a wall, her belly all swollen and big. And we´ll learn that Yakomaru had her give birth to newly born human beings that Yakomaru then turned into his personal war machines. Could we make out how old the fiend in this latest episode was? If not, maybe it is indeed some 9-10 year old boy/girl.
But that´s really the most disturbing "solution" I could come up with. It´s probably something less provoking.