(You can leave hints about what happened in the game, but complete spoilers that happened way after where the anime is currently at is not welcomed [Not like I can stop you but please don't spoil the story of the game further than the current anime])
So it looks like in Episode 22 that Ash, and by extension Us as the player character, are the original ARKs that are basically biological weapons created to fight the Dark Falz. The comments of where I saw the episode also implies that Ash has tried to stop the bad future of Profound Darkness awakening but failed many times and only one of them ended up a Dark Falz.
I know Profound Darkness is a boss (I mean seriously the final boss of the original 4th game is here, how can it not be a boss?), but if I was in Ash's place I think I would tell Matoi about it reviving from her dying, or more specifically getting killed by a Falspawn or Dark Falz and then try to come up with a way to actually fight the Profound Darkness like the heroes of Phantasy Star IV did. Anyway it seems like the next episode we'll probably find out the true history between Ash and Matoi, or just Ash. What are your thoughts and theories from the latest episode of the anime so far? (people who haven't played or watched the game's story specifically. Although I've seen comments that the anime is only a little different from the game so everyone is still welcomed to theorize and then talk about the anime when it continues.)