Promise doesn't stop her. Promise goes to think of ideas.

Promise makes a few trips Downside. She meets and chats with various humans until she has made a friend, and then she gets her friend to feed her a bit of human food (it is called a "strawberry") and try telling her to do things, and it doesn't work.

Then she goes home.

And she stops being so inconspicuous with her sorcering, and trades aggressively with her created food until someone wonders where she is getting it all, and in not very much time, someone has told the Queen about her as a point of mild interest, and the Queen has come to collect her as an ornament for her court.

Promise pretends that she can be ordered here and there on the strength of her name - by the Queen, by everyone the Queen tells it to - until she has a moment to put a gate Downside in front of a striding Queen.

And close it.

And fly away, ignoring calls from the Queen's other vassals - even her name, out loud, she'd despair of that if it mattered the least bit anymore - until they wonder if they've managed to forget it already and start trying variants and then she's gone.

And go Downside through the other gate and approach the tower, while the Queen is still confusedly trying to find her way back into Fairyland.