The links were expertly done in 2.
There was a smaller jab in Chapter 7, that was also mind blowing given the casual nature of its reveal.
Beyond the goofy premise of this strip...it's interesting that certain memories were of great value to Pyra (conversely, Malos rejected any sort of attachment), and that there was some sort of interface environment where the Aegises could go to access or delete them.
I wonder how the Ouroboros, and perhaps Moebius, are potentially an offshoot of this. The merging of the two worlds has led to several interesting developments, and a bunch of mere mortals have been granted some very specials powers...
Can't read any of that lol.
This: "interface environment they can access", and looking at the visuals:
Sounds like the 'memory world' first established in Xb1.
It's the literal computer memory of the tricore, er trinity processor, in xb1 it was established to contain a calibrated match of the physical world, as described by the placement of ether (revealed to be nano machines in xb2). This was down to the accurate up to date placement of every atom, including those in every being, and the chemical/electrical state of each and every brain. (Why Shulk still 'existed' after dying, and where Alvis pulled the personality/consciousness of the party from to help motivate Shulk to create the new universe). This was necessary to make editing matter with the nano machines possible, if it was not accurately calibrated to a virtual match in computer memory, attempting to edit reality would be like joycon drifting but with atomic/molecular placement. NOT PRETTY. It also contained the scripting code of any monado users, at the beginning of the game this consisted soley of Zanzas pre established harmony of events, which he provided to Shulk to read as his visions. (But as the game went on, Shulk began subconsciously writing his own, and ultimately became the dominant user, to the extent Zanza couldn't even get a read.)
It also contains the exact same data for Alrest. In addition, every blade and titan sends their data in to computer memory. All this data is also fed straight to Klaus, through the pulsating data cables. Klaus is aware of Zanza, and the universe of the Bionis and Mechonis. The reverse does not appear to be true, Zanza seems to be oblivious to his other half and the original universe still existing. My take is he's simply being denied the data.
This physical world and memory world is the blade take on the real word/imaginary world/U-DO concept. It's also a very amusingly sci Fi 'accurate' take, cutting out most all of the mumbo jumbo magic typically associated with the genre, Xenoblade is strikingly clean in this regard. The power of God consists of a computer to process the 'god command's into program code, a computer to run the software for controlling the machine, including offloading to sub processor cores, and a driver (yup) to link the software from the input hardware, to the output hardware (ether/nanomachines). There is exactly one impossible unexplainable device, which is the monolith itself, the conduit, a transdimensional perpetual motion machine, capable of supplying seemingly infinite power, and while much of the high technology of xb2 was the result of generations of ai self design, this power supply is the only thing that made any of these devices, even physically possible.