Exlor
This chapter makes so much sense, and if you think about it we just need to fit in one more piece, Lucky. What if due to all this time being stuck and unable to do anything, the gem cat is actually the crystallisation of a progenitor. That's just a guess as lucky is just as big a glutton for all the stuff the system seems to need to repair itself. Unless of course, Exlor is throwing us a curveball and lucky is just like Doraemon and Nobita, where Doraemon travels back in time to help Nobita grow into his future self.