He spotted her a lot sooner, because he has Elf vision and then augmented it by making a plastic model in his hand, which he drops on the ground after examining it and concluding that she's not Quendi, not quite. The others in her party are even less Quendi but he makes plastic models of them too, just in case. 

Hello! he calls once she can clearly see him. I'm not reading your mind! I am the kind of telepath who can read minds but I'm not doing it. However it'd be convenient if I were because I don't speak your language, and if you wave at me then I will try to read what you are saying back to me and not read other stuff but I'm pretty bad at that actually.

Well heck. 

"Mages don't do telepathy, do they? Not in real life?"

"Some can. I can't. Morrigan, you can't, can you - "

     "No."

"So we can't. And it's not just sending a message, it's all complicated fade stuff. Why?"

"Telepath at two o'clock."

She waves.

Hi! I don't know if this is working or not! I can't tell very well from here, but you look elven, are you lost?

Hi! We are different kinds of Elves, I am lost and more lost than you're thinking probably!

"Leliana, Draconis. Everybody else just stay on the path, we'll be back with the kid in like two minutes."

Morrigan says something about picking up super-powered urchins being a bad idea as a rule, but hey, that's why she didn't call Morrigan. She's already heading up the mountain to the kid. 

Well, you're found now. Are you Dalish, did you get separated from your clan?

More lost than you're thinking, he repeats impatiently. More lost than you realized people could be, probably. I can teleport if you don't want to hike all the way up here.

That'd be cool, she says, trying not to think that he is adorable, wherever he's from.

Pop! He is very small. He is unreasonably well-dressed. And he has wings, blue leathery bat-wings that are curled tightly against his back so they could have been a backpack from a distance but clearly aren't up close. Hi!

Aww! "Hi!"

She kneels, because it is important to initiate important negotiations with small children from a position of symbolic equality, and this rule probably does not change when the child in question is a ridiculously powerful winged mage wearing clothes that elves really, really don't wear. She offers him her hand. "Aria Tabris."

"Curufinwë Fëanáro."

"Curufinwë Fëanáro," she repeats, hoping she's not butchering that too badly. Doesn't sound elven, but he's obviously a really weird elf, if he is in fact an elf at all. "I assume your parents aren't just hiding behind the mountain or anything."

He's mouthing along as she talks, concentrating.

I ran away from them when I was twelve because I didn't get along with the gods of the planet we lived on and they couldn't leave because my dad's the King. Now Boots and Rúmil are kind of my parents but they're at least two hops from here and I don't know what the intermediate hop is - I was experimenting with a teleporting thing and teleporting can go between worlds that are neighbors but not worlds that aren't and the world I'm from isn't neighbors with this one.

"- I think I am missing a lot stuff I'd need to make sense of that. You are obviously very lost. Can't leave you in the mountains by yourself, though, so if your parents aren't anywhere where we can easily find them, you should probably come with us."

"......that's a demon, Aria."

"So? He's lost."

I don't have his permission to read him so I don't know what he's saying yet.

"He wants to make sure I know you're a demon."

Are there other people here who have this kind of wings? He stretches them out; they're wider than he is tall.

"Just demons. I've only seen wings on desire demons, though, which I'm guessing is not your department."

"I mean, to be clear, if he's going to behave himself I'm not strictly opposed to traveling with a demon that's pretending to be a little kid, but you do realize that they eat mages, right?"

"Draconis, I am aware of what a demon is, I do not kill things that are abiding by the rules of ordinary civilized society."

I still need a translation, he says unhappily, I'm not going to get a language that fast.

"Sorry. He's concerned that you're going to try to possess him."

Oh I can't do that, the kind of demon I am is different.

"Ah," she says, only mildly skeptically. "Tell you what then. The last time I fought a possessing demon, I killed it. So you possess anyone, and I stab you. Since you can't possess anyone anyway, you don't have to worry about running afoul of this rule, and we can all move on with our lives. Deal?"

Demons, where I'm from, are not stabbable. 

"Well, they are here. Which is convenient, given that they're very bad at playing nicely with others. The last one we killed was trying to possess a girl about your size. If you can avoid doing anything really inconsiderate like that, then we should get along just fine, without any threatened stabbings at all."

"Can avoid trying to possess anyone," he says carefully in her language, and then looks pleased with himself.

"Nice job!" she says, delighted. "You may want to cover the wings somehow anyway, though, they're gonna get you in even more trouble than the combination of fancy clothes and elfishness. Which is honestly also a problem."

He makes the wings invisible. Should I copy your clothes? They're really ugly.

"I'll bet," she says, a bit sadly. "This is a warden uniform, though, I don't think it'd make sense for a kid to be wearing it. Hm. Tell you what, I have some wedding clothes I've been hanging onto. I bet I could cut the fabric down to something your size. They're not as pretty as what you're wearing, but maybe we can split the difference, OK?"

Demons where I am from can make stuff. Any stuff. If you tell me what you want it to be like I can make it and then you won't have to lose your, uh, wedding clothes. Children wear wedding clothes here?

"Nah, they're just what I happened to wear to my wedding. Alienage elves aren't rich enough to buy clothes to wear just once, so anyone who saw you would just figure you were dressed up for any random event you wanted to look nice for. I'll show you and you can use 'em for a pattern so you don't look completely ridiculous."

He's not totally clear on how weddings go but he thought you didn't wear clothes to them. Okay.

She leads him back to the rest of the party and shows him a couple examples of prettily dyed and embroidered outfits that aren't too pretty for elves. "Don't copy the bloodstains, I just couldn't get those all the way out."

He's really confused about how these people do weddings.

I can make you a copy without stains if you want, he says, and makes himself something in that genre. It's a little prettier, but only a little. 

"That's very nice of you. I don't think I need it, though, it's not like I ever wear them anyway."

Then why do you carry them around?

"Sentiment, I guess. I had them with me when I left home, and I didn't have much else to remember the alienage by. We're going to Redcliffe, by the way, though I suppose you don't know where that is. Decent-sized town that Alistair hails from. That one's Alistair," she says, pointing at a human man in heavy armor who's currently guarding the back of the party.

If you send me a clear enough mental picture of it I could teleport you all.

"Well, that would certainly be convenient for the world-saving timeline, but I've never been there and I don't think Alistair's been there since he was a kid, so he may or may not be able to provide that."

World-saving?

"Yeah. Ferelden is in the middle of the Fifth Blight right now. D'you know about the blights?"

I'm not from around here. I might be able to fix it, though, and my family will once they find me.

"The blights are not really - you know, whatever. It's like this. A looong time ago, the Maker created elves and humans and - supposedly not the dwarves, that's this whole other thing - in his image, and that was fine and dandy, occurrence of the first sin and subsequent genocidal hiccups notwithstanding. Then, the magisters of the Tevinter Imperium, which was responsible for a lot of the aforementioned genocide, and which is currently the nation to the northwest of the nation to the north of us, decided that they were going to go into the Fade and take over heaven, 'cause apparently that's what you do when you're an uberpowerful magister who doesn't have enough other goals in life. Unfortunately, for them and for everyone, their sin corrupted heaven, and they were hurled back to the physical realm as the first darkspawn. The Grey Wardens - that's us - defeated them, the first time, and drove them underground, where they stayed for several centuries. Except it turns out that underground is where the archdemons are imprisoned, so now they seek out the archdemons until they find one, at which point their mysterious darkspawn decision-making process leads them to attack the surface en masse, and we get another blight. So that's fun. This blight is the fifth one, and until we kill the archdemon responsible, the darkspawn are just gonna keep destroying stuff and trying to break all our toys. Did you catch all of that?"

I have a perfect memory. Would it work to just put all the archdemons on another planet? Because then we wouldn't have to wait for my people to find me.

"Well, we'd have to find them all. Also I am only sort of clear on what a planet is."

"It's like the moons."

"Ohhhhh. I guess maybe you put the archdemons on one of the moons, if you found them and could teleport them," she says, ignoring the horrified stares of everyone behind her.

I can find them really easily if they're not magic. If they're magic I can probably find them but not really easily. I can teleport them if they're physical. And if they can't teleport. This probably isn't a great solution but it doesn't need to last very long - oh, I should probably talk with them, I guess, to make sure they're actually trying to end the world and won't just stop that...

"I don't think they really do the talking thing, although I appreciate the thought process, that's very responsible. They're super magical and I have no idea whether they're physical or whether they can teleport. I guess they probably can't, given that I think our previous game plan was stabbing them? Alistair, do you figure an archdemon is the sort of thing you stab?"

"I was definitely hoping for something we could stab? But Aria - "

"Alistair thinks they're stabbable, which usually implies at least a certain degree of physicality."

If they can read or do osanwë that works too. 

"Doubtful, but you can certainly check, if you're all right with them trying to kill you while you do."

No one can kill me. - if they could possess me it would be very bad, so I should know more about that probably.

"Sounds like it would be. Never heard of a demon possessing another demon, but I used to think they only went for mages, and it turns out they can go for cats, so I'm betting anything with a body is theoretically on the menu. They teach mage kids how not to get possessed, and the rest of us just try to avoid their notice, mostly. You seem... noticeable." 

Yes. What do they teach mage kids?

"Gotta ask a mage for that." She frowns at Draconis. He frowns back at her. "You know I'm actually gonna take a minute to discuss all this with my friends, is that OK?"

...well, it's okay with me. I don't think I have enough information to decide if it's okay generally.

"OK," she says, laughing a little. 

She stops walking and turns back to her friends, perfectly cheerful and a beacon of confidence. This is very important, because her friends seem to have very little of either confidence or cheer right now. "So. This is Curufinwë Fëanáro. He's some kind of elf demon person. Still figuring out how that works. Point is, he's lost, he's gonna play nice, he wants to help us save the world, possibly by teleporting the archdemon to one of the moons - we are still working out the kinks in this plan - and he's gonna be hanging out with us. Anyone have a problem with that?"

"Yes."

"Yeah, that seems like a bad idea?"

"Is there an 'undecided' option, because I don't know if I have problems now, but as the person most likely to be possessed by demons, I don't really want to give up my right to have a problem with it later?"

"It seems... unwise, Aria."

She waits a second to be sure that no one else has a substantive objection. "OK! Thank you for your objections. They have been noted, even though most of them were very vague and not the sort of things that gave me very much more information. Counterpoint, I don't know if anyone else has noticed, but the world is ending, we're critically short on manpower, this kid's apparent weight class is at least twice that of both of our other mages combined, and unlike almost everyone else we've run into - with the exception of, well, everyone currently here - he might actually understand the seriousness of the situation."

"But a demon, Aria. We know what comes of negotiating with them. What would your commander have said of this plan?"

She considers.

She looks at Alistair.

"I know exactly what Duncan would have said. Duncan would have said that strength of character and nobility of spirit are sometimes found in unlikely places, and that if you bother to look, then you'll find them in all sorts of places you didn't expect. And he would have said that a Grey Warden has to be willing to pay any price, take any risk, make any sacrifice if it means stopping the darkspawn, because the alternative is losing everything that there is to lose. He would have been wrong about some of those things, but he would have backed me up on this."

"...can it really fight the archdemon?" asks Alistair, sounding pained.

"Remains unclear. Right now he's concerned about other demons trying to possess him."

"...is that a thing that can happen?"

"I don't know! I didn't go to Templar school! I didn't even know they could possess non-mages until, like, a month ago. But he wants to figure out how to be safe, and I think we're all better off if the teleporting elf kid doesn't turn into an abomination, so - he doesn't speak Fereldan yet, so he can only talk to you if you give him permission to read your mind." Sten snorts. "Otherwise we have to wait until he picks up the language, and I feel like how not to be possessed by demons might be the sort of thing that you don't really want to put at the very end of your training regimen."

"You think he's gonna pick up the language fast enough to actually talk to anyone before this is over?"

"I dunno. Probably. He's very smart. Aren't you, Curufinwë."

I can learn the languages today. If people don't want me to read their minds I could build an arcology somewhere in another galaxy and take you all there and learn the language and then learn about demons, they shouldn't feel like I'm in danger unless they let me read their minds. 

"I understood some of those words. Concepts. However this works. On the one hand, that sounds really convenient, insofar as I understood what it was, and it is considerate of you not to pressure people into letting you read their minds. On the other hand, it is a known fact that making ill-understood deals with demons always ends badly unless you are willing and able to stab them afterward."

She looks up at the sky thoughtfully.

"On the third hand, it's about to rain, so honestly I think I'm on board with this plan. Though you will probably have to demonstrate the ability and willingness to take me wherever we're going and then back here before anyone else is willing to try this."

Okay. I'm going to go find a planet and build the arcology first. I'll be back in five minutes.

He disappears.

"He's... trying to build something on another planet? I am fuzzy on the details."

He bounces a galaxy out, looks for suitable planets with about the right gravity, finds a barren one, teleports there.

The planet isn't barren anymore when he teleports onto it!

He's in an incredibly tall forest, with trees that reach into the sky and nearly block out the alien sun. There's decaying plant matter at his feet. There's air here, and it's breathable, but something's wrong with it; it stings his eyes a little.

He leaves immediately. It was barren, he checked - he checks again with a plastic model -

Yep, barren planet.

...he finds a different one. He checks with a plastic model. He sends a camera while staying well away and then conjures the contents of the camera.

Rocks. More rocks. That looks like a rock that's a slightly different shade of gray.

Well, then, what happens if he teleports in?

He's in a field of tall yellow grass that bows under the weight of powerful rainstorm that soaks him to the skin. Thunder sounds from some indeterminate direction. The ground beneath his feet is muddy and sucks at his shoes.

This universe seems like bad news.  

So he'll visit a different one.

Do barren planets in the adjacent universe behave normally?

Yep! Normal barren rocks that remain well-behaved barren rocks when you stand on them.

He writes Cam.

I am now three hops away from you probably. The universe I went through before coming here has weird magic and it seemed safer to leave. Make sure however you're searching for me you don't miss me because of that. 

Thank you.

Curufinwë Fëanáro. 

Then he builds his arcology.

"Suppose it kills you," says Draconis, when Aria has explained that she plans to follow a demon to some moon somewhere.

"'M tough to kill."

"Strands you, then."

"If I get stuck on a random moon somewhere then you're gonna have to go on ahead to Redcliffe without me, and then to the Circle and then to the Dalish. I'm sorry, I really am, it's not like I want to take stupid risks, but if Duncan were here - "

"He's not."

" - no. No he's not. Which means it's up to the ten of us and possibly demon kid. I'm going, you wait for me one day tops, and at the end of the day you head to Redcliffe. That's the official warden game plan, the rest of you can take it or leave it."

"Do try to come back safe."

"Wouldn't miss it."

He's back about twenty minutes later. Your entire universe is magic! It's very weird.

"Cool," says Aria, because there might be people who know what that means or what the implications of that are, but she doesn't think she's one of them.

I picked a different universe for us to hang out in because I don't know what the magic does and it might be dangerous.

"Pretty sure it is, if you use it wrong. We can ask Draconis about it once he's willing to hang out in your... place."

If you run on magic or something it's possible something weird will happen when you leave your universe. I've never heard of people who couldn't leave their universe but I haven't heard of a universe like yours either. 

"Hmm," says Aria, because this is a really important thought and - "You can only teleport physical stuff, right?"

I mean, Elves have souls and that works fine for us when we teleport. 

"It's not that, exactly." She chews her lip. "Is there a cooldown, can you bring someone right back if something goes wrong?"

Yes.

"All right, then. Me first." I'm probably not gonna collapse, but if Draconis or the big statue-looking person follow us over after this, then you watch them, OK?

Yeah. - are you sure you don't want me to try, like, an animal or something, if you think the local magic might be sustaining everyone -

"That might be smart." I'm really pretty sure that animals aren't the same as people in the relevant ways, and since you have to test it on one person before others I do want that person to be me, but as long as it doesn't cost you anything to try a squirrel or something first, go for it.

I can do that. - well, if I find a squirrel.

He sets out to attempt that.

"Testing it on a squirrel first. He's a very responsible scientist."

"I see."

But not experienced at squirrel hunting! He gets one eventually and teleports it and him out of the universe.

The squirrel is distressed and confused, but otherwise unharmed.

He takes it back with him. Okay, we can try you now.

"Cool. Thank you for your service," she adds, to the squirrel.

Pop.

"Pretty sure I'm still alive," she says brightly, and then looks around. "And we're where, exactly?"