"Did you know that would happen?" 

Leo shakes his head.

Sasha nods, and then pulls out his phone and looks up "dog commands". 

Heel isn't actually applicable, Leo's already lying down and right next to Sasha, but — oh. 

"Speak." 

"Oh, good, that was a pain."

"...I guess a magical dog that talks when I order it to isn't actually any weirder than a magical dog that turns into stone when I order it to. Hi, Leo." 

"Hi! I'm your dog now."

"How did that happen?" 

He scratches his head. "Well, I'm supposed to belong to Fairy Princess Lilith, but I don't like her. And you picked me up and named me and gave me orders so I think I can make a case."

"....Lilith, as in my classmate Lilith, is a fairy princess." 

"Yes. They left her to be fostered by humans and fostered a human baby in return. It's a traditional way of improving relationships between governments."

"Alright," he says, because what else can you say, "I can see why you wouldn't want to belong to Lilith, I'm not sure I'd trust her with a goldfish. What do you mean by 'you think you can make a case'?" 

"Well, I have to prove I'm yours by the law, don't I, or I'm not yours."

"That.... makes sense, I guess. So I found you and carried you and gave you orders and gave you a name, and you have to argue to someone that that makes you mine?" 

"I'm a fairy. I am the laws and rules that constitute me. If it breaks the laws I can't do it."

"Okay." 

He's simultaneously getting the sense that he's in over his head, and getting the sense that this is the ordinary-teenager-stumbling-across-magical-world equivalent of tutorial mode.

"There are other things that help-- if I can make an argument you're royalty that would help, because I was made to be a servant to royalty, and of course if I swore an oath to serve you there wouldn't be any more question. It's a promising sign you can make me do magic at all."

"...I guess it's not impossible that someone way back was fucking the Tsar, but it's not very likely. Um. I'm Jewish, that makes me a descendant of Solomon?" 

"That clicks. And it's very good, Solomon was a master of djinn, it's appropriate for a descendant of Solomon to have a fairy slave."

....yes okay he should really have expected that he has ever read about faeries but even so. 

"Servant. Not slave." 

"If you prefer. I can't actually disobey my master."

Not!! Better!!

"Still. Language is important." 

"That's true. Laws are made of language."

"Yeah." This is way more responsibility for another being's welfare than he was expecting or for that matter ready to have. He will think about that later. "...so what do you eat." 

"Cobwebs sprinkled with fairy dust under the moonlight, or alternately sushi."

"I really hope it doesn't have to be good sushi, because I don't have money and I don't have fairy dust, but I can make that happen. — how often do you need to eat?"