He nods a bit, glad that he's taking this seriously, committing these things to memory now that it's all out in the open. He isn't entirely sure how to feel about how calm Thorfinn seems about all this. That should be a good thing, probably, but part of k wonders if he hasn't exactly pieces the whole picture together yet.

He smiles, small and thin, but it exists, at the comment about the modern part of Kol's existence. He switches back to English now, "Mmm, yeah, I have lived for over a thousand years. Missed a century in there, thanks to my brother." And if he sounds bitter, it's because he absolutely is.

"Thank you," he nods quietly at the promise. "Jo knows." He adds after a moment, just to be sure he knows he doesn't have to keep this from her, at least.

And then everything he'd worried about managed to click together in Thorfinn's head. Kol nods slightly, "Yeah...yeah, it's-- how we survive. Until I'd showed up here, I hadn't needed real food in centuries. Something's different here, though." He squints suspiciously about that fact, but doesn't comment beyond that.