It’s a small exhale of relief, of finding out that this particular line of interrogation isn’t about putting a metaphorical bullet in his friend’s head while Mobius’ brain deteriorates from perfectly-preventable lyrium dementia. Because oh, it’s about the anchor, and this is actually far more preferable as a topic —

“Not all of us are prepared to pull a Wysteria,” Stephen admits. “But fair enough. I’ll take note of it. And you’re right, I’m actually far less worried about this one; Gwenaëlle’s had hers for eight years, with no especial ill effect. And if-when it does start becoming a problem for you, or any of us, I imagine it’ll be far more visible and noticeable than… y’know.” A rotating gesture of a hand, an indiscreet indication to Mobius’ head.