Thorn sometimes likes to butter her up, such as it is, before calling her to his room. She thinks he's running elaborate multivariable experiments on what puts her in a marginally more or less cooperative mood. The obvious confounding factor is that after having been buttered up she has to walk to his room. Also, on this particular occasion, she was not allowed to heal herself of her (relatively minor, but still painful) injuries before she went to the library. She did her research with shredded wing-edges and a black eye and an almost decorative crosshatch of bright red cuts down the backs of her legs. This is Thorn, so it wasn't thoughtlessness, but she hasn't speculated much on what it is instead, besides - Thorn.
She walks carefully -
There's a ripple in the air. She walks right into it.
And then she is elsewhere. She can no longer make meaningful progress towards her appointment, so she stops walking. Her eyes flick left, right -
Well. It would be hard for this to be worse.
Promise doesn't actually know anything about the habits of birds, but she's pretty sure that means "do I need to hand-feed you", so. Nod.
Promise eats muffins. Mortal food is weird, but she doesn't make faces about it. (She is not allowed to complain about what she's fed.)
"She's real," Thomas says, sounding stunned.
"What are you talking about? You saw her! You were there too!"
"I thought it was just... a daydream, or something."
"Nuh-uh."
"This is nuts."
"I know!"
When the muffin is gone, Anne asks anxiously, "Do you need anything else, fairy lady?"
Oh fuck yes she needs other things. She's not going to be able to answer followup questions, but her options are "nod yes" and "stare blankly". She goes with the first.
Ambiguous. Anne's the only person Promise can stretch to count as a court member, right now; but another name could easily drop and then Promise could nod or shake her head for them too. But not talk. She still couldn't talk, not without pretty fortuitous happenstance. Promise shakes her head, slowly.
All of these suggestions get their own headshakes. Especially the fairy magic one. Promise can do no sorcery here.
Nod.