"Greetings, strangers, good afternoon!" he says, loudly enough that the people inside the room will notice, briefly scans the group, observes the wings, does a brief check for green veins, and opens the door with a grand sweeping motion. "Welcome to Mir!"

(this is loud enough that the small group of people sitting inside the Grand Hall can hear it and stop talking about any sensitive things they were discussing)

The architecture inside is somewhere between a cathedral, a great hall of state, and (off the central obvious track and so not immediately obvious to non-snoopy interstellar ambassadors) a collection of cozy offices and less cozy bureaucratic warrens. A diplomacy person will break off the conversation with another group of diplomacy people and come over and wave and bow them in!

Nelen repeats that they are envoys from another planet to this person!

Tarwë probably got an opportunity to hear snatches of the sensitive conversations.

"- the elections in Rossano -"

"- the question is if they're rational."

"Who is?"

"Next year if there's no rebellion."

(Shortly afterwards -)

"- We're honored that you came to see us," the specific diplomat talking to them says warmly, as he takes them somewhere comfortable. "The High Tribune will want to talk to you personally, I'm sure of that."

(Someone else nods. "I'll tell Her Ladyship*.")

(*: This is almost certainly the wrong translation, but English doesn't have a good natural term for 'she is my patron and I am her client and this is acknowledged in how I refer to her', which is the information conveyed to listeners in the manner of address.)

"We'll be glad to meet them! In the meantime, please let us introduce ourselves. I'm Nelen Utopia."

"Tanaka Natsuko."

"Tarwë."

"Zanro."

"Cassiel Jones."

"Ataniros," he says. "Tell me, from where do you come?"

(The room they are taken is comfortable for Elves, for fans of comfy furniture, and for lovers of tea and baked snacks, though if the baked snacks are an attempt to produce cookies they have the major problem that neither chocolate nor sugar are native to the Republic. There's a nice big soundproofed window that opens to a pretty-looking garden with a fence on the other side of it.)

"No two of us are from the same world!" says Nelen. "In addition to each star in the sky being a sun that may have planets of its own, there are also entire other universes you can't reach by traveling any distance through space."

"Really?" He blinks. "Fascinating. But you are a single embassy, not many traveling together?"

"Yes, we represent Vanda Nossëo, a federated union of many polities."

He would like to nod and invitingly say "yes, please do go on" while he extracts as much information as he can until the Important People show up or invite Vanda Nosseo to come join, if he can get away with that! A couple other more junior diplomatic people will also show up to take notes.

Sure, they can go on! Nelen can do a little illusion show of the map and some pretty locations within it and highlight where they're all from and explain how Tarwë and Zanro are from Ardas but different ones.

And then they can hear the hum of a jetpack outside the window, and watch a trained, professional diplomat flinch slightly as the jetpack lowers a woman outside the window who murmurs a very complicated spell and then hovers straight through the glass windowpane. She's wearing an elaborate folded blue robey thing with two dramatic white streaks (blue seems to be the color of the administration, here) and goggles and, yes, a jetpack. There's a wand by her side.

"Hello, people from another universe! How far did you get without me?" She'll wave a slightly acid-scarred hand. "Arimer."

Nelen will introduce everybody again and explain he's just been summarizing where they're all from.

"Right," she says, nodding and throwing herself into a chair. "So I'll skip all the 'that's impossible' bits, they are not my job any more, wanting to take apart your universal translator and see how it works goes in the nonurgent stack, so the obvious question from my perspective is if you can do sorcery on arbitrary zones for planet-to-planet teleportation what problems do you have left? Are there no unoccupied worlds to farm, are we the only place that has nonsentient construct laborers and you want to buy some..."

"- oh, no, we aren't here because we need something you have, though it's likely that your magic will find a valuable place in the multiversal market. We're here to see if you need anything and if you're interested in membership in Vanda Nossëo."

"Probably won't, it doesn't work if it goes more than about six hundred feet from our shores, though it'll probably have some manufacturing niche uses -"

"- In that case you are going to want to wait for everyone else to show up before talking about stuff, we don't need much, really but if you have a better eternal youth solution we wouldn't say no -"

"- Either way that suggests that there's time to explain how magic works - just as soon as Sorimer shows up -"

"We're happy to talk to whoever it makes the most sense to loop in," says Nelen agreeably. "And how your magic works is likely to be very relevant, we'd love to hear about it."

She did in fact mean how their magic worked, but is not too surprised if they want explanations first. "Every department head is going to want to talk to you," she says "- and probably not, if you can teleport from planet to planet ours isn't going to be able to do much you can't - assuming that isn't hugely expensive, can you use it to drive mills? If you don't have the logic we can explain - do you have a workable eternal youth solution?"

"Yes, we do! Species that aren't naturally unaging can in most cases travel to a specific area of the multiverse," he highlights the Cube neighborhood, "around where Natsuko is from, and there's shapeshifting technology that works there, and they can shift into a younger version of themselves and go home. You could use the teleport to drive a mill, but that's not what it's for and there are more efficient ways."

OH SHIT

"Cool! About how long have you had that? How does it work? Are you altering matter directly, using some engineered chemical to change the composition of the cells, transferring the soul directly from body to body -"

"This world," Cube, "has a subsidiary world attached to it with a lot of undifferentiated matter in it; it's called z-space. The technology allows you to use DNA from other creatures, or yourself, to create a new body out of that matter. If you don't spend long in your new form you just pilot it remotely with your original body's brain in z-space, but if you leave the neighborhood, or stay in the new form more than a few hours, the safety features kick in and your consciousness continues in your new body. Also it makes you communicatively telepathic, the inventors had that natively and didn't want to lose it when they shapeshifted. It has worked for species with souls who've tried it without a problem but if you have souls it'll call for some testing just in case yours are different. Most people don't have souls."

" - Oh, fascinating, I would have thought that the transfer would be almost impossible, have people tried using this for brain enhancement - wait, sorry, how do people act without souls -?" 

That is around the time the Savior with the highest running speed shows up, he being behind the Savior with the jetpack but not anyone else. Rissimer (a large, friendly golden retriever of a man) will rush in, grinning at everyone - "Hello!"

Simultaneously tackle and get tackled by Ari - "Riss!" 

"Ari!" And to everyone else - "Rissimer, Minister of Peace - her husband -"

Disentangle there's company and she just asked a question.