Is teleporting and making things and the song it?

Not even close. Some of the stuff I can make is from worlds way more advanced than yours and I've got touch healing and there are a lot more songs and I can't be seriously injured.

...and you want to put me in charge of the world.

I am putting you in charge of the world, alternate universe versions of you are really good at it and you will be too and it shouldn't even be that hard, unless this world has powerful magic that no one's thought to mention.

Everybody was assuming you were just embroidered; most of them probably still are.

Yeah, in some places saying I'm a demon would terrify people, what's the best way to explain it convincingly here.

Probably still saying you're embroidered. And not mentioning all of your powers at once because that makes embroidery much less plausible.

"...Were you going to teleport me to Tsopix," says the person who wanted to go to Tsopix, "or should I go back to sleep."

"We can go now," he says, and makes a scale model of the landscape, is there an obvious border -

Not obvious from the landscape features, no.

"Want to point me to where you want to go, or is anywhere in the country okay?"

"Uh, the capital?" says the slave.

He makes a scale model of that. 

The capital of Tsopix is a low-tech human city.

Yeah, he just needed a visual to aim for. Now he and the slave are there. "Here you go. Need anything?"

"...like...?"

"Clothes, food? I can ...teleport it to us from my house."

"...clothes and food would be good..."

...large bag of nonperishable nutritionally complete stuff, four exact copies of things various people around here are wearing, clean and folded.

"...thanks."

"Of course. If you need to reach me you can, uh -" notepad - "you can write on this and I'll see it."

"...no I can't."

"Why not?"

"Can't write."

"...oh. Well, you can draw on it and that'll work too."

".......okay."