[Despite his focus on his own soul, he had taken note of what impression he could get of Mikasa's, unintentionally a bit curious of it. This was his first semi-look of an unbroken human soul. A pity he couldn't see more of it, as should have been natural for him... but a little intriguing nonetheless. Inferior to his own, of course, but at least (presumably) intact. And for all that the Ascian remained scornful towards humanity, it would be a small point to her favor.

And there it was, that small, fragile-seeming tether to someone that hadn't been there before. It had been a while since Emet-Selch had felt a Bond so weak, so new- a tie to his soul that he'd have to adjust to. But it wasn't unpleasant, and he hums to himself after they depart, bored witches already ignoring them. Glancing down at Mikasa, he wondered if he was imagining the barest hint of added life to her. Magically-starved as she had been, the Ascian wondered if even this small-yet-steady thread of sustenance would already be providing some suggestion of relief.

Eventually he breaks the silence, tone casual as ever. Soul-tying, no big deal.]

Well. You should feel an improvement soon enough. I hope you'll make the most of the magic I'll be unconsciously feeding you.

[Not that he wouldn't be getting a bonus out of it as well, but that won't keep him from mildly implying that she was some kind of leech.]