Allegra and Cerys both clearly notice Deskyl approaching, but Allegra makes it more obvious by moving so that there's clearly a space for her (and DZ) to be included in the ongoing conversation. 

They arrange themselves where indicated.

    "Hello ma'am, sir; Master Deskyl has some news that's unfortunately likely to interfere with your plans - your local physics is metaphorically unwilling to cooperate with large-scale generation of electricity; she's still willing to teach the theory of what she knows but she expects that you won't be able to apply it safely, in most cases."

"Okay. Have you got any other plans for - large scale technical advances?" He is attempting to look attentive but is clearly being distracted by an argument only he can hear, again.

Allegra is very good at not showing her emotions on the surface, but is clearly feeling somewhat exasperated - not with Deskyl, but with the world in general, and repeated changes of plan in particular.

Deskyl gives Allegra a sympathetic look, but signs to Cerys.

    "She says she hasn't had time to think this through as well as she'd like to but she might still try to introduce mechanical computing; that's fairly limited without electricity but it might be useful enough anyway, if your physics allows it. Unfortunately while combustion engines don't strictly require electricity, the technology she's familiar with for managing the climate change they cause does, so it wouldn't be wise to introduce them here."

"I'm very glad to hear it."

He thinks - or listens - for a moment, then looks back up at Allegra.

"Mechanical computing sounds like something I'd expect more Urizeni to be interested in. I know you have history with Urizen..."

"If you can find Urizeni scholars who don't mind rubbing shoulders in a potentially literal fashion with a Steading full of excitable Briars, then they're just as welcome as Leaguish engineers."

"And I might want to pad the remainder out with even more Thorns, I can just tell that word has already got out and now we might have Leaguish bravos as well as Highborn unconquered attempting to show up unannounced."

    "She says she's usually more than competent to defend herself against anything up to a midsized army, sir, and she's not sure yet how your magic will affect that estimation but she doesn't expect it to be too severe."

"Not that I doubt your capabilities," replies Cerys carefully, clearly a little taken aback by this assertion, "but it'd still be a good idea to have some Thorns around who are officially sworn in to the militia. If only so they can swear to a magistrate that they deputised you when there was trouble, rather than it just being a foreigner and several Imperial corpses..."

Deskyl nods to him before signing.

    "She says that's reasonable, sir, and that it would be understandable for the other people in the area to be more comfortable with a traditional force available to defend them, she'd just rather not have people assigned here unnecessarily."

"Assigned is a bit of a strong word, though it might be a bit easier to cut down the numbers since most Thorns are off in Broceliande if they were at anything like a loose end; I'll just mention it to a militia captain in Seren and I expect I'll have to be strict about how many people they're allowed to send."

This gets another nod, and she signs to Allegra this time.

    "She says she expects to be able to take attackers alive most of the time, if you'd like to arrange to be able to handle that, ma'm."

"...only if the Thorns are happy to take guard shifts? Or march then off to Seren where they cease to be my problem."

"I think we can arrange that."

    "That sounds fine to her then, ma'am, sir."

"Unfortunately, I'm the closest host to Seren right now, so if that is all, I have a little bit of sprinting to do, in case someone," it's hard to pointedly scowl at someone inside your head, but it's fairly clear he's talking about one of the other egregores, "is already deniably manufacturing trouble."

    "She says it seems fair to mention, if they're listening, that if they make trouble for her she might decide to make trouble for them in return, and that means more from a Sith than from most people."

"Escon would like to make some excuse about how he isn't responsible for what other citizens might decide to do with information, also please don't make trouble for the whole of Highguard, they actually do useful things sometimes."

"Eh, as long as the grey pilgrims are fine, the Unconquered will probably just enjoy it," replies Allegra. "I expect we'll only get the excitable types, who will hopefully come back somewhere their zeal will be better placed."

    "She says she'll make sure she's appraised of the details of the situation before she makes any specific plans, sir."

Cerys nods. "I'm sure Allegra can fill you in. I'm... going to go fetch some militia now, so at least someone recognised will be on hand for the international incident?"

He seems at least half joking about the last bit, but in a way that contains some actual uncertainty.

If not waylaid immediately, Cerys starts jogging off down the road, gradually building speed as he goes.

Deskyl watches him go for a few seconds, and then signs to Allegra again.

    "Master Deskyl has noticed that you seemed to be expecting her to kill anyone who attacks her, ma'am, and she's wondering if it's going to cause any problems or have any cultural implications if she doesn't."

"I mean, killing Imperial citizens usually causes legal problems. If you're capable of not killing them, you should do that; self-defence only applies to the amount of force you actually need to end the imminent threat.

Hmm. Actually, are you capable of restraining someone long term without killing them? Basically the only way we have to do that is to tie them up and guard them carefully - the Unconquered are particularly well known for being able to escape any restraint in five minutes flat if someone isn't essentially entirely engaged in stopping them, which is very tedious. 

Normally if there are people available to do it we'd just march a dangerous criminal off to the nearest magistrate as soon as possible, and if they were blatantly attempting murder they'll probably be executed shortly thereafter. Which does seem a bit of a waste of everyone's time, sometimes."

    "Not straightforwardly, ma'am, or at least not beyond doing something like breaking their arms, though her sensory skills do allow her to notice when someone is trying to escape, even at some distance."

    "She says she'll probably want to talk to the first few and she'll see what she thinks after that."