[Hijikata ponders that for a while, exhaling a waft of smoke into the blue sky. He doesn't feel like Gokudera wants or needs expressions of sympathy over his suicide, horrible as that must have been, so he tries to focus on the logistics.]

...

I have a few theories, but ultimately we won't be able to be sure. In any case being bounced around time and space so much is bound to get more confusing the more overlap accrues. In my case I spent ten months on Prismatica, and when I returned to Earth I ended back up in the same moment I'd been taken from. So I got to live those same ten months again in my own world - and each time I visited Prismatica after that it went exactly the same way, no matter how long I stayed.

Spending pretty much two years in the course of one year was already confusing as hell, and your situation is so much more complicated. I've got to say, though, that on Prismatica dead people would also come back to life. They'd crystallise, slowly heal, and eventually revive. It was all down to how the life energy there worked. Each world affects those who enter it on a physical, even metaphysical, level, right? Who's to say Amoi didn't digitise all of you guys' minds and cram you into a simulation?

[He takes another long drag.]

But if that's really true, then Avalon must've made you "real" again. At least I'm pretty sure we're all flesh and blood here.

[Who can really say, though? At this rate he's going to think himself into a Matr*x rabbit hole...]

However, in the end, amalgamation or not, you're still you.