Curate, connect, and discover
putting my thoughts under a cut since my friend who knows nothing about kh will probably see this post:
Thinking lots about Roxas and Xion post Kingdom Hearts 3, though this is more focused on Roxas.
They're both just children who came into the world at (supposedly) fourteen with no memories, and therefore no knowledge or experiences, and now they're thrust into as normal a life a Keyblade Wielder can get after being trapped for so much of their short lives. Xion became almost nonexistent until suddenly becoming two people against her will, only becoming whole when Sora rejoined her minds. Roxas had his ENTIRE LIFE replaced, only to suddenly remember his previous life in a fit of rage.
He clearly remembers both lives at the same time, shown with Sora being sad when leaving Twilight Town and saying goodbye to the real Hayner, Pence, and Olette. As well as appearing in a black coat in the fight in The World That Never Was and the snippets of memories we get to see afterwards. So his mental state must be a disaster, remembering two very conflicting lives and a one of them wasn't even real. But it was real to HIM.
Four kids living in Twilight Town enjoying their summer vacation, but now Hayner, Pence, and Olette don't even personally know who he is. They're willing to befriend him, clearly, but these aren't the people Roxas knew, and so much of his normal, fake life is overlapping his life as an Organization Member, and vice versa.
It's probably also practically impossible for this fifteen year old with one year of TRUE life experience and no real memories to process this to explain the horrors he went through to others. Even his friends. Only Xion would really understand what it feels like to be two people at the same time, surrounded with nothing but reminders of everything he is and isn't. But would she truly?
I headcanon the Days Trio +Saïx/Isa made the abandoned mansion their home, so it must be even more torture to Roxas. Probably to Xion as well, but I doubt as much since she made her choice willingly; though she did kinda force Roxas to kill her but that's neither here nor there. Oh but he definitely remembers her body crystallizing in his arms as she shatters into truly nothing, not even memories remaining, it all being his fault.
Man, can't wait for that Psychology of Roxas video :)
My thoughts on Xion aren't all that organized and I feel I put down the gist of what I have for her so far in my ramblings above. I just really feel bad for her and hope she gets to have a role in Kingdom Hearts 4. I do headcanon she's extremely touch starved and will hold Roxas' or Axel/Lea's hand as much as she can though. Also that she avoids Isa as much as she can, out of fear, anger, and pure spite.