She can still tell that this is bullshit, though. It's what makes logical sense, okay? This is clearly a dangerous thing to be doing. It makes much more sense to have a safety measure to know when to get out of dodge than to carry around a memento of a dungeon long past.
Aestrix totally wants to look at each and every one of Kose's rings to figure out what they do, because yes she noticed her playing with them, but she suspects that the rings are probably caught under the umbrella of 'the recipient.' That'd just be smart.
"That was sweet of them," she says sincerely, because it really is sweet for a dungeon to give someone a way to alert them if a potentially hostile dungeon is looking at them. She's tempted to offer to try to make another, but, uh, she is currently lying like a rug. Abort, etc.
She instead goes back to making floor patterns. This floor will be very pretty when she is done with it, though she's mostly working by moving the bits of stone around to make lighter and darker parts, and some subtle engraving. Not too much to trip over, but some. That'll be good for puzzles, later.
"So! Puzzles! I have thought of a couple basic ones, but don't know how viable they are with my current, uh, is there a term for dungeon power? My dungeon power budget."