Who let the frogs out? (OOC)

Emma probably does not have any way to recognise the face of the 'summoner' [ref], but she would probably be able to Put a Face to a Name [ref] if someone else mentions it.

The 'street-level' characters (Benji and Max) may well recognise —or have had dealings with— the summoner, they are a minor magician with a few tricks... that may include summoning. You did not know there was a connection to Chaudry, that may be new.

If our new person is messing around with demons it would make sense that Persephone might recognise them, whether by face or by name is up to you, Drgwen.

If any (or all) of you think your character would know them you can Put a Name to a Face [ref] with Power. Once their name has been shared everyone else can Put a Face to a Name [ref] with that information if they needed it.

As always, feel free to flesh out details of the new NPC [ref], including name, descriptions, gender, pronouns, ethnicity (if not obvious from the name:) and anything else.

No worries. We can keep the roll, you can post what you do and see and recognise in the RP when you can.
That's good news.
No, you Mark the Advancement (Adv?) checkbox for Power, no matter the dice outcome.

'Ratings' increases come from Advancement, but, officially, only 'after five advancements', using the two '• +1 any Circle (max+3)' option.

Wouldn't that just be Turn to Violence [ref]?

You can roll that if you want to assault this person in the public. Given her past experience, Persephone might be angry enough to do something foolish like that, but it is up to you.

They were not looking for a fight, so they are pretty well cowed already and may talk anyway, but rolling the Move gives some structure. I assume this is with 'threats'? I think threats have been established.

Sure, if you want to describe what it is like under there, go for it.

You also do 2-Harm to it. It does 1-Harm back but your tough hide gives you 1-Armor, so you it will lash out but to no avail. Include those tidbits in your description, as you like. (The Harm is not optional with this Move (see the Pulling Punches sidebar on page 75).)

Extra Harm would probably have killed it, but this is as good or better, for the reasons you outlined.

The conversation is still ongoing, though. You persuaded them to talk... you are talking. We know the mechanical effect, deal with the details in the fiction to get you there.
Give it time, you are still talking. It is a conversation.

But so far their 'counteroffer' is 'talking as demanded, but offering as little as possible till it becomes worth their while'. You don't have to accept their counteroffer if you don't like it, but it is a negotiation, so you can keep talking and see where it gets you.
The Persuade was to get them to talk. They are talking. What did you ask them?
• who are you
  • Answered: Nefydd [ref]
• who taught you that
  • Answered: taught myself [ref]
• why are you summoning a demon
  • Answered: They are set to watch the place [ref] and noticed supernatural activity, some of this you must guess at.
• do you work for Chaudry?
  • Answered: Confirmed, though by mistake. [ref] [ref]
We need to deal with the fiction. You Persuaded them to talk, which they are doing. You did this with threats, so they don't like you. (You accused them of lying when they hadn't.) You are 'offering them protection'... from their friend, who is your enemy, but not theirs.

What have you done that would get them to turn on their friend and mentor? Persuade is not mind-control.
Quite right, the conversation goes on.
Which is making them even more scared of you, but threats are what we have, so that is the nature of the relationship.
The conversation is still going, under the effects of your previous roll and now bolstered by Max's additional threat [ref] and fear.

You have changed the goalposts from 'talk' to 'come over to our side', but nothing you have done would qualify to get them on your side. Why should they betray Chaudry?

Think of the NPCs as real people, with their own lives and wants and needs. How would a real person react to your capturing them and threatening them and scaring them, and then claiming you would be a better friend than their friend? You will have to work at it.

We can't really disregard rolls in PbtA, if you had rolled a 6 or less I am bound by the rules to make something 'bad' happen (GM Move), so assume every roll counts and don't roll if it is not supported by the fiction or if you are not prepared to accept the consequences.

Your threat is pretty clear, though the exact meaning may be hard to convey when you can't speak. What are you trying to achieve, though? Make the demon run away? It can't do that without permission. Make Nefydd run away? They were doing that already before they were tackled to the ground (in a self-inflicted way:). Double down on the existing threat? Done, they are royally scared of your group.

@oopsylon, @Delirium, and @Morphling: Are any of you going to Put a Face to a Name [ref] (Emma has heard the name)?

Knowing more about them might help the interrogation.

You can only do this Move when you first encounter an NPC, so it is now or never.

That’s fair. I’ll play it through the fiction. Works for me.

Yeah, she wants the demon to leave. If it won't she's going to kill it and mark corruption.

She hasn't gotten a proper look at Nefydd yet, she is preoccupied with fighting a demon. I'll roll once she's finished with that.

I rolled Put a Name to a Face and missed! I think that means it's your choice if Benji doesn't know Nefydd or owes them a debt, vagueGM

Do you want to Owe them? If so tell us how. Else you don't know them.