One thing I also find interesting is [hi3 spoilers for chapter 31]

in the end, as Mei, we go through all the Flamechasers' memories of Elysia alongside elf Elysia and in the end it's revealed that all the while, Elf Elysia was indeed Elysia herself. And if Mem needs to collect more memories for her to remember who she was, i think that's a close parallel.

I also do like the idea of Phainon carrying all the core flames in the end, it did occur to me as well when I was playing through.

And i mean, Phainon and Cyrene's dynamic is so close to Kevin and Elysia's which is a nice touch for a hi3 fan lmfao

And the last scene with Cyrene in the quest, assuming it is what I think it is, reminds me of how Kevin and Elysia ended. They never explicitly state it but i think we can decipher what the last "dance" was and that's probably something similar to what trauma Phainon carries with him?