And then Phix asks:
"So, what could be done to portals to make them less vulnerable to small invisible monster spies?"
"We are thinking of putting easily-scryable microchips in us that would also work as keys to portals. The problem, there, is that if mages found out they could easily scry for any of us. Do you have a witchy solution?"
"Consulting alethiometer... Wards not discriminate watcher. That sounds like a no, no best of both worlds. Sorry."
"How likely are you guys to need to be able to scry on us when you can't find us just from having met us?"
"I think being findable to help is more important than being slightly harder to find for people who probably won't even know how to find us in the first place."
"I'm inclined to agree, especially if we make whatever it is obscure and really specific. We can have certain locations warded, if that helps?"
Cam makes a whiteboard attached to an empty area of wall. "We can make Ice a to-do list."
These items appear on the whiteboard. "And I can microchip everybody once we have a design and the portals can be modified to make it worthwhile."
"There's the lady who killed you, who has to be able to guess now that you're a daeva, but I guess she's not likely actively out to get us."