Leaving Bakuda's employees as unknown but probably minor quantities who she can't neatly take in right away, Promise sends Bakuda to the safehouse to deactivate the trap and wait. If Promise doesn't show up in twelve hours Bakuda is to turn herself in to the PRT, but the PRT doesn't have to know that.
Promise flies back to the headquarters, puts in an appearance for Oni Lee and Lung so they won't have to tell anyone anything, and looks for someone to report to.
The Director wants to rant at her in person, but has a reason not to do that. So she sends Armsmaster.
"To start with: Good job. You apprehended a dangerous criminal and saved unknown numbers of lives. That said, what were you thinking?
Being a solo hero is dangerous. Many die, and I realize that's not a threat to you, but we found out tonight that Bakuda can do worse than that. Even if she can't harm you, she could have had unexpected capes backing her up, or just handed her weapons to someone else. And keeping her, or whatever you did, no matter how airtight your orders were there better have been an impossibly good reason for that."
"She did have other capes backing her up, but they were easy to distract and might have been more of a problem if someone less suited to stealth had been with me. I didn't get their names, though. Apparently she has hostages with bombs in their heads - which will not explode, but still sound unpleasant. She says she can remove them and I wanted to figure out how to best go about getting that done; maybe you have a better way to do it?"
"Ordinary surgeons might be able to handle it. Depends on what she did. Panacea has been known to remove foreign objects, but she doesn't do brains so it would again depend. We might need Bakuda to demonstrate at least one removal, if anyone volunteers for that."
"If no one volunteers the point is moot anyway; I'm not going to have her attacking people to get the bombs out when they aren't going to detonate. I might be able to get them out myself, but it would be slow... Anyway, can you be more specific about what exactly you want me to do with her in the near future?"
"Turn her over to the PRT. The Director already promised to try to get her sent to a non-Birdcage prison—a decision I disagree with, by the way, except insofar as it was necessary to secure your cooperation—and no matter how thoroughly you have her controlled she has not been arrested for public opinion purposes. If we tell people the person who attacked their city and kidnapped their families is in custody, nobody panics. If we say we don't have her but we're very sure she can't do it again, less so."
"The Director did promise to try; I'm not sure how likely she is to succeed. I can't even say if she seemed particularly confident, as I wasn't directly speaking to her."
"She's likely to manage it. Prosecutors listen to PRT Directors in cape cases. Worst-case, they ask for a Birdcage sentence anyway. Then the defense asks you to testify that it's completely impossible for Bakuda to ever build a bomb again, and only the harshest judges would cage her after that. No guarantees, but the odds are very good."
"Well, I suppose if I want information about whether the Director keeps her word I need to test it out sooner or later."
Keeping villains contained long-term extrajudicially, even when it's theoretically an option, isn't really something heroes do here."
"I'll go get Bakuda. If you want to send someone along with me this time I don't object; stealth won't be as much of an asset."
He silently sends a message, and two uniformed PRT operatives appear shortly. "Where to?"
"I got flying directions. Can you follow me that way if I go slowly?"
So she leads the PRT agents to the safehouse. She tells Bakuda that the Director has promised to try to get her into a non-Birdcage prison and that this is the extent to which Promise is willing to stick her neck out for crazy murderers at this time, and then tells her to go docilely with the PRT agents, since none of the three can fly and Promise can.
She returns to her gate. She wants lunch.
The official heroes incarcerate her like they did the others, and run damage control of both the literal and public relations types that tend to follow when a villain mass-bombs a city.
She lunches. She makes her tree bigger bigger bigger. She talks to a neighbor fairy who wants to know who has moved in, but this is uneventful and he leaves her alone after they exchange nicknames, he tells her where the nearest library is, and they establish that he'd rather not take any candied dewdrops from a leaflet thank you.
She goes back through her gate and inquires of whoever's convenient whether they want her to direct Bakuda to remove bombs from people or if they want Promise to do that or if it's being separately handled or what.
If not, the Director and Armsmaster have a few outstanding items of business.
And what do the Director and Armsmaster want?
They are still after her to make gates—their best teleporter is available to get her and Vista to PRT offices, and some other hero teams have expressed interest—and Armsmaster would like to start learning sorcery.
Promise will make one point to point gatepair in locations of their choice in exchange for a spare flattener, and she will consider the prospect of teaching sorcery the next time she is at a fairy library, the location of which she has just recently learned.
If it's a question of a single pair, they have to decide between increased ability to call in help from other Protectorate teams and increased international coordination for Endbringer fights. They try to talk her up to more pairs for more flatteners, and regular money.
"I'll take more flatteners to have spares. To a point. Five, maybe, not fifty, unless you can credibly guarantee that an unused one kept somewhere safe will still be operational if I pick it up in ten thousand years. I will take money for one gate, in case I ever want to have money, but the entire point of money is that you can get it anywhere for doing anything, and as such if I ever need to get money anywhere else for doing anything else, I will probably decide I undercharged for the gate and close that one until that problem is resolved."
We can't guarantee thousands of years, not right now. Five for now, and we'll let you know if we manage to copy another tinker's time freezing technology and add an off switch?"