"Don't drink the river water," she recommends. "This particular river comes from a spring up on a mountain that way, and the spring would be safe to drink from, but between here and there it picks up enough detritus that it's not completely pure. I have safe water at home."
He walks down the river bank, looking for a good place to cross. She'll probably point it out when he reaches it.
"We have that sense about names but not about the food thing, but mortals are uncommon and interesting enough that someone might well test orders on you to see if they've got an incidental claim like that. Especially if you don't look taken, or only taken by a very new leaflet with no vassals of her own to bring to bear." She points out a shallow swath of river with tall rocks. "Can you wade that?"
He takes off his socks and shoes and folds his slacks around them. After a moment, he takes off his suitjacket and buttons it closed around the bundle.
"D'you mind carrying these across?"
She shrugs, takes the bundle, and flies across the river with it to wait perched on a rock on the other side.
The river water is cold and the riverbed is gross and squishy and the river is moving very fast and it's rather harder to stay upright than he expected. Not harder than it would have been if he had been properly modeling it as a massive wall of liquid falling horizontally as opposed to a thin band of wet, but harder than he was expecting nonetheless.
Halfway through he slips and smashes his head against a rock. Not hard enough to knock him out, but hard enough to get him stunned and washed downstream a few meters before catching himself on another rock.
What a colorful vocabulary he has.
Promise puts his bundle down and flits over to the rock, and hovers over him. "...I can help pull you back to the shallow bit, if you think having me hauling on your hand would be more use than using it to swim," she says. "Or I can try to get you - branches or something?"
Wait, no. Help is good. Asking people for help is fine and a good idea and reduces the probability of drowning. He'd lost track of this, on account of the head injury.
He grabs her hand. "Iz... izzit bleeding, christ, I can't tell if it's bleeding..."
Promise has a bit more difficulty hovering when he's got hold of her hand, but she manages. "A bit. It doesn't look huge, just enthusiastic. I know a healing spell that should work on you but I don't have it completely memorized, I'd have to look it up."
He ties one of his socks around his head. They're clean enough, he put them on this morning. That's how hygiene works. Definitely.
"Healing spell. Also very complicated, specialized magic. I'm... going to need to understand the fundamentals of this before I can decide what sorts of things ought to be surprising, now."
"The one I'm thinking of is simple," Promise says. "Introductory."
He's not sure if it's the head injury diminishing his willingness to press the issue, or hunger. He stops talking, walking along in silence. Questions can wait for when his head isn't swimming anymore. It appears it didn't get the memo about the rest of the body being done with that.
"I'm afraid you'll be cramped, although you should be able to fit," she says, opening the door for him.
He locates seating and slumps. "Walking. Back home I don't have to do that so much."
Back home he also didn't ford rivers or acquire head injuries, but those things weren't strictly typicaly parts of getting around in this place.
"I don't walk much either, though I suppose it's for different reasons. The water in that pitcher," she adds, pointing at a glass vessel on what appears to be the fairy treehouse equivalent of a kitchen table, "is safe for you if you're thirsty."
"Uh. I don't... think I swallowed any river water, but it definitely got in my mouth. Is that... something to worry about? What's the threshold there?"
He doesn't see any cups- he supposes he's supposed to drink from the pitcher. He lifts it to his mouth, and...
And if she were lying about water being safe, and not wanting to make him her vassal? Not eating, not giving his name, those were in his control. If she were to enslave him, this is how she would do it.
He hesitates. Waits on the answer to the river question.
"...Well, there's nothing to do about it if it's going to get you in trouble, really," says Promise. "I'm not sure, though. Did you swallow it? Let me get you a cup -" She gets him a cup. It's made of wood.
"I don't think I swallowed any mouthfuls, no- although I could have missed doing so when I was dazed- but I did ordinary swallowing, and some of that- you said, detritus- could have lingered in my mouth. If you don't know the rules there, I don't suppose it matters."
"Well, rinse and spit - into the potted fern over there, please -" there is indeed a potted fern, and, on inspection, no sink - "if you think you might have something stuck between your teeth, but otherwise I'm afraid I can't help you figure out whether you've got claim on you or not until some flowertender or something tells you to stand on your head and you do it."
Max rinses and spits. He refills the wooden cup. He still doesn't drink.
"Well, if someone ordered you to levitate, nothing would happen; standing on your head it probably depends on how thoroughly you can't." She starts browsing her bookshelves, wings twitching occasionally to help her keep her balance. "Maybe you have to try, maybe you're just barely close enough to being able to do it that when you really have to you can? But it doesn't give you special powers."
He looks apprehensively at the cup.
"You can have any number of masters. They can contradict each other and you obey as many of the orders as you can, most recent taking precedence, and they can't order you to ignore the others - or to harm anyone who qualifies as your master, either. Nobody likes situations like that, though, unless it's an actual chain - A masters B masters C, A collects C's name from B and then sends out B and C to do things together with B in charge between the two of them, like that. There's relatively amicable ways of settling it when it's messy. If you'd walked in and introduced yourself by name to me and some other fairy I'd have tried to get you in a dice game because I'm good at Rain Dice and think I'm liable to be nicer than anyone else you'd encounter, and then the other fairy would most likely leave you be, if I won."
He sets the water down on the table. This is too much.
"Anywhere I'd be, in this forest, yes. I can't vouch for how nice the fairies in the rainbow desert five days' flight south would be, but you wouldn't find me and one of them in the same place, would you? I'm not claiming much exceptionalism, there aren't that many fairies in this forest or my neighboring haunts. I know for a fact that if your gate had disgorged you in the scribes' place, for instance, the scribe would have done his level best to get your name or get you fed and use you for slave labor copying books."