She lands on a wide boardwalk amid skyscrapers. There doesn't seem to be anywhere for vehicles to run, just a wide street with a few stalls set up at the base of the skyscrapers. That over there is probably a bar, that's probably a movie theatre, that is a hot dog stand and the stall next to it appears to be selling cheap jewellery, mostly garnets in dark steel. 

Almost everyone has horns. Some people have wings. Her sudden appearance gets a couple swears and a "watch where you're 'porting!" from a nearby passerby. Over there there's a man leading a non-horned woman on a leash. 

There's big advertisement billboards on the sides of the buildings. "Splattercorp 2 - Bloodier and Gorier", "Refined. Exclusive. Excruciating. The new Sanguine Ruby minter from OTC.", "Rejuvicare Medical - Regeneration from 499 OTC." 

"Definitely a developed world." she muses quietly. Before she goes anywhere she does a passive check for radio signals. Do they have any unencrypted radio channels?

"- and I'm just saying the Houses are still around, right, they didn't go away just because of the war -" 

Music full of guitars and synthesizers and growling/screaming. A half-dozen channels of that. 

A channel in another language: "- looking for more Drow entertainment you can try the dark district near Motherload, the Magpie and Raven clubs there give everyone a chance -"

"- 106 Flame FM for all the latest in OTC news -" 

There must be at least 50 channels. 

Definitely a developed world. She'll walk along the boardwalk for a while, she might be a bit of a misfit because of her large backpack but if nobody objects to her presence she has no urgent need to go into any stores.

She passes another two couples (?) wearing leashes in public. One of them is a woman leading a man, the other is a woman leading another woman. Collars and necklaces without leashes are a common fashion statement as well, particularly two types of necklace - one made of black thorns, the other with a single pure blue gem mounted in silver. The silver one seems higher-status?

The theatre is advertising "Fire in my Bones", "Fall of the House of Shariva", and "Red" on the side of the marquee she can see. She can spot another human like herself, wearing a rather skimpy outfit and trailing along behind a horned and winged woman. She has a visible tattoo of some kind of rune on her upper right shoulder. She's seen a lot of tattoos in the crowd, of flowers and skulls and pentacles. 

Down the street she can see a train track on stilts above the crossing avenue; a bullet train whips by as she watches. There are a lot of balconies and crossing bridges on the buildings above her, and winged people are darting back and forth or hovering above the street. 

There's a fast food store, a souvenir shop (the theme runs to runes, flames and whips), a public art piece of some kind of metal horse with spikes on, a restaurant with a patio outside where people are sitting and talking. One of them, in a business suit, is sitting alone and talking on a smartphone. Her wings flare out behind her around the narrow chairback - it seems to be designed for people with wings like her. 

There's a fashion store with skimpy outfits ("Dutiful Heart"), right next to a similar chain selling more conservative outfits ("House of Valerian") and what's maybe a tattoo and piercing parlor ("Sharps").

She wonders any of these tattoos or collars are magic. She restrains herself from active magical scans for the moment but opens up a passive magical sense. Is anything radiating magic for lack of a better word? Or are there ambient magical fields?

Almost all the horned people and all of the winged people are radiating some degree of magic. It seems to be inherent, though some of them are stronger than others. Most of the tattoos aren't radiating any magic but the rune on the human woman is bright to her senses, definitely designed to be seen. There are trace emissions from some of the collars and necklaces, though none of them seem to be in use right now. Oh wait a second, that one - one of the black thorned ones -  is pulsing gently. It doesn't seem to be doing anything obvious though. 

There's an ambient magical field around the train tracks down the street.

Inherently magical species it seems. Nothing that seems to be trying to do anything to her. Probably for the best to refrain from active scans, someone might notice. She'll keep walking for the moment. She's looking for some sort of posted map, a library, a bookstore or a computer cafe if they have any of those things. If she can't see any of those for a while she'll give in and ask for directions.

There's an internet cafe another three blocks down, and a small bookstore across the way from it.

That was fairly fast. Bookstore first. Hopefully they don't have rules against backpacks.

Nobody bothers her. 

The bookshop is broken into fiction and non-fiction sections. The fiction section is further broken down into graphic novels, Cthonic fiction, and otherworld fiction. The non-fiction section breaks down into biographies, histories, cookbooks, and artbooks (including poetry.) 

History is definitely the priority. Is there anything that looks like an intro textbook?

Nothing that immediately grabs her eye, no. 

The shelf holds: "House Acadia: Past and Present"; "Contact: A History of the Namer's War", "The Little People: Non-Demons after the Namer's War", "Sword of Shinrai: A Memoir of the Namer's War", "We Had Their Names, They Had Their Gods", "Takkarash: A History of Cthonic Minting", "Whipless", "Houses In Unrest", "Shinrai's Conquest". 

She starts with "Contact: A History of the Namer's War" That sounds like it might be evidence of a cross realm war which is super concerning.

The table of contents reads:

1: An Introduction by Professor Maxim Electra

3: Contact

29: Shinrai's Response

51: The Theft of a Name

85: More Than We Could Chew

119: Thorn's Escape

152: Insurgency

169: Open War

195: The Gods Come Down

225: In The Rubble

248: A New System

289: Gentle Masters

From some quick skimming, it becomes clear that Cthonica made contact with an out-realm polity (the Oifilei Trade Consortium or "OTC"), attempted to hijack it with name magic, and were defeated and forced to give up many of their cultural institutions, among them slavery. 

And apparently they now use OTC currency. A war of retribution seems justified on the surface but history does tend to be written by the victors. She's in favor of banning slavery though so that's a promising sign. What other cultural institutions?

Apparently everyone here is a sadist, and as a result torture (both recreational and as a punishment) used to be commonplace. Recreational torture is mildly suppressed (consent is required now) and corporal punishment has been largely phased out. Non-demons and half-demons now nominally have the same rights as demons. The old nobility was largely destroyed in the war and the Houses that exist now are more mercantile and new-money, closer to the OTC's corporation model. Name magic is all but illegal now and remembering the truename of someone who has not consented to give it to you is a crime. 

Is there any background on what a truename is? If she should avoid giving out her name that's something she urgently needs to know.

Skimming the last few chapters turns up the following: Truenames are unique to each person and come in the form "adjective-adjective-noun", eg. "Quiet Trembling Breath." Everyone instinctually knows their own truename and can be compelled to produce it through certain magics. (Doing so is usually a crime.) If a demon or tiefling knows someone's truename they can issue magically-enforced orders to that person just by thinking it. Truename slavery used to be widespread but has been largely wiped out. 

Did she suddenly grow a truename... that's going to be awkward. She runs an inwardly focused scan on her own soul. Did anything of note change since the last time she did this while preparing to take this trip?

Nothing about her soul seems to have changed. However, there's clearly documented cases of people from other realms having truenames. That's how the whole Namer's War started.

If she tries to summon her truename does it come to her?

Bright-Glittering-Waters.

Well... that needs to be reported. She skim scans the entire book into memory and transmits it back to Crescent with a note that she apparently has one of these truenames. She also attaches the content of the new soulscan for comparison maybe there's something subtle she missed.

And now she's going to look for a book which might indicate how the OTC protected themselves against this assuming this one doesn't... maybe it does.