A bit of MORE angst - imagine in a Kuron scenario real Shiro coming back to the team just to learn that Keith sacrificed himself.
It’s too early in the morning for you to hurt me like this (I say as it’s like…noon). I want you to think about what you did and — oh who am I kidding, I love angst.
LISTEN. I’m like 100% sure that in a Kuron scenario where Shiro came back to learn that Keith sacrificed himself, Shiro would crumple in on himself and just — fuck, it would hurt him too much to bear.
I don’t think Shiro would play the blame game on others — he would totally understand why Keith did it and accept that this was Keith’s decision — though I do think there’s a chance he’d feel partially responsible for it. I see him as this long term thinker who absorbs things in this really extensive big picture way. Like he’d probably be thinking all the way back to the past where “If we hadn’t even gotten close, none of this would’ve happened.” BUT he would also recognize the fact that none of them would even be this far in their efforts of winning the war if it weren’t for Keith. I think he’d be really torn up between these two ideas, and more.
But I think ultimately, if he loved Keith romantically, this self-sacrificial aspect of who Keith IS is just one huge thing he knew he signed up for, one that makes him love Keith all the more. And heck, he probably loves that about Keith whether it’s romantic or not in canon. There’s a reason they’re such close friends and I’m sure it’s because they have this silent and mutual understanding of each other and what’s at stake for the universe and the greater good.
If Keith’s sacrificed had succeeded, I think Shiro would do all he can within his power to make sure it was not in vain. Maybe he’d think about Keith every time he looked at the sun, close his eyes, and remember a boy who was so devoted and intense, he burned too brightly for the rest of them to hold onto.