[Papyrus doesn't immediately offer more jokes or banter. It seems like they're both feeling haunted, with thoughts of the past, and people they knew, and resignation. He catches impressions of Alphys, of all people, and does indeed shoot Sans a baffled expression. Why so much familiarity?

But the darkly amused resignation catches and grates in a way that's concerning, and clearly not his own emotions, and distracts a little. He shifts his phone for a live feed of his own soul again, comparing his feelings of surprise with that resignation. The way the static of it seems to duplicate and copy outside in brief flickers, like his multitasking is so all-encompassing that it's even showing up in his soul... The flickers of lightning, reminding him a little more of monster electronics back home.]

...Why do you think I'm all mechanical, anyway? I had dreams, before that earthquake... But they were all, of melting? Nothing like this.

[Into water, or some kind of shadow puddle monster. Dissolving onto the ground, not the same as death but not unlike it. The solidity of metal had been a tremendous comfort, in comparison. But it still weighed him down, made him clumsy until he adapted. Maybe it's just as well it's just the one wing.]