Seto can feel the change...and it's his nature to pull away from emotion too, to go back into work, but. Even as emotionally stunted as he is, he knows the older main is experiencing guilt. The same guilt they all are.

If he can't help himself, maybe he can help someone else.

"...I was in medical with them, so I saw the aftermath," he reminds him. "And from what I saw the miners do, from the chatter over the comms before I left? There easily could've been many deaths. I didn't know what was happening on the field either, and how that felt..."

He tries to meet Siebren's eyes, even if he has to tilt at a weird angle to do it. "It's done, and we're mostly intact. We stockpile, train, and prepare every month. That we're largely flying blind and still underfunded and outgunned and still live? We're defying the odds here."

Then, after a moment...

"It's too big to be anyone's sole burden."

Gee, Seto, maybe you should take your own advice. But at least some part of him recognizes it.