"I can't justify not arresting her after this. And I don't have time to debate while people are dying. I can promise I'll do everything in my power to get her sent to an ordinary prison if that's what it takes to convince you, and that I am likely to succeed. That's the most I can offer."
"We arrest her anyway, because she's only one cape and the current barrier is not knowing where she is, and we may or may not be able to make her remotely stop the attack. If you refuse to cooperate at all, we find her later or not at all. The bombing continues until the Tinker who specializes in bombs runs out of bombs."
"I will get her if I can, but you cannot indefinitely compel my assistance by having emergencies. I think emergencies are very common around here."
Just get the location, and we'll send as many capes as possible to back you up."
And Promise goes back to her vassals.
"Do not use your powers." (Both.) "Do not fight in such a way as to activate them." (Lung.) "Do not give me any names of any person I do not expressly request unless you know the name of a person who is about to directly attack me, in which case tell me their name immediately. Do not lie to me. With these exceptions, you may act freely. Tell me Bakuda's name and location." (Both.)
She is apparently headed for a storage facility in the Trainyard. The words might not mean much, but she gets more informative directions as well. No PRT agents happen to be in hearing range at the time, so if she strongly prefers a lack of support she has the option of not mentioning her destination.
"If I'm not back in half an hour, tell the first PRT agent or Protectorate cape to ask where Bakuda is."
And now... she thinks she remembers where the exit is.
On the way, she'll see explosions. They're not continuous, just one every so often at irregular intervals, but that adds up to a lot of them. When she gets closer, there are signs of several smaller ones. There was some kind of a fight here.
Does that person belong to the name she has? How about that one?
Two unexpected capes are nearby, presumably also villains.
Promise flies lower. The laughter's loud enough that it's possible the other two capes won't even hear her say -
"Stop."
The other two notice, of course. "Bakuda?" No answer.
"Say their names." If she doesn't know their names, this won't do anything.
Nothing happens. One of the other two jumps up and waves a hand in front of Bakuda's nonresponsive face, but hasn't heard Promise yet.
Okay, now something that was already pretty damaged is sorcerously on fire. Loudly enough that Promise can murmur - "Tell them to go investigate that."
This is weird, but weird isn't that far out of the ordinary for her. They take it at face value and leave, glancing back every so often.
"Stand normally. Quickly, honestly answer my questions. If you do nothing, will anything explode in the next five minutes?"
Well, a bunch of unexploded bombs everywhere. Some of them dangerous in their own right. But nothing that isn't already happening.
"Taking no extraneous action, remote-deactivate as many bombs as you can."
She goes into a completely unremarkable storage unit, not taking any care to stay quiet, and starts pushing buttons in full view of her cape minions, hoping they'll try to stop her. They don't.