Neighbor easily found, looks like a Lizzie potion saved his life or something.  Scouting suggests that that the existing undead aren't going anywhere, except the skeletal dragons which creepy old dude is using to flee the city.   Clementine is bailing on foot while using rouge skills to conceal herself from people who don't have their own rouge skills or just 100 levels worth of increase to their base stats.  The normal cultists are taking a bit longer to process things, but seem to be coming around to the idea of feeling in panic.

...To capture people for interrogation or not.

Eh, he doesn't really care and his utility spells are better than his offense spells.

He'll grease and then sticky the area around the cultists - he doesn't super care if some escape but that should slow them down - then cast a make-your-target-glow spell on Clementine and screw with the underbrush to entangle her, then the skeletal dragons don't look very agile so they can have a wall summoned immediately in front of them.

Clementine is tearing a path through the undead that are now aware of her presence and completely out of control. Cultists are neutralized and also potentially at risk from the undead.  Creepy guy is slowed by the wall, but it turns out skeletal dragons can clime surprisingly well.

ARGH.

He'll send Takeko a message to stop showing off and come help, then wipe out any undead near the cultists, spread the grease so the undead will have trouble moving, send one of his more powerful blasts at the dragons, and... Clementine can be Takeko's problem. Her fault for leaving the utility monkey to this.

Luckily being level 100 continues to be be ridiculously OP by local standards. So an extremely large area is greased and the dragons are wiped out.  Creepy old dude has fallen to the ground and appears to be alive but having some kind of mental breakdown and talking to his pet rock.  Cultists are running.

Fortunately for Soreiyu's patience, Takeko chooses that moment to get within 'chain stun spell' range.

Overwhelming your opponents with spam summons is a common YGGDRASIL tactic so she has spells for it, and with the locals being fairly weak by the standards of spam summons there won't be any who manage to resist it.  In this regard her spell is a massive success.

However, the lower level of the inhabitants is only one of the differences between this world and YGGDRASIL.  Like many games YGGDRASIL prevents allies from harming each other outside of very specific circumstances, thus the spell and tactics Takeko has spend years learning don't account for the need to not hit Soreiyu, which is what just happened here.

It doesn't actually do anything to him, but those are some very creative curses.

Well now they know friendly fire is something they need to watch out for.  They have some time before reinforcements arrive to finish off the stunned undead, but not much.  Now would be a good time to get their story straight and loot/kidnap anyone they don't want to share with the authorities.

She apologizes to Soreiyu, and - well, the biggest thing to figure out is how they knew. Spying's rude, after all. Caught wind of a rumor? Soreiyu was in the area, noticed something strange going on?

(She'll leave the problem people to the locals to straighten out. She's not currently interested in more prisoners.)

The head of the local adventure's guild was the first serious authority figure to be alerted so he's basically leading things.  Adventures finish off downed undead while guards start arresting cultists and Clementine.  

Meanwhile, the guild leader invites any still visible PCs back to his guild.

Takeko dismisses Soreiyu and Kuchinawa - no need to risk them being recognized from up close - and goes in on her own. (She's still in contact with them, in case it's needed.)

“Allow me to introduce myself. I am the head of this city’s Adventurer’s Guild, Pluton Ainzach.”

Pluton is powerful-looking middle-aged man.

He has the aura of a mighty veteran about him. There's no doubt that he is an excellent warrior.

He has a pretty high spot check and a lot of experience with different races, so he will strongly suspect Takeko is non-human.  However, he is smart enough to not force the point, at least not immediately.

"I'm Daimyo Takeko Uchiha. A short time ago my castle was transported to a place nearby here without my permission. I've been trying to learn of the surrounding area since, and help out where I can."

He takes a second to processes that before becoming subtly excited.

"Thats quite surprising. Where did you come from originally? Is anyone likely to come looking for you?  Daimyo is different enough from are titles that it isn't being directly translated, so I'm not sure if you're independent or have an Overlord that might conduct a search."

"I came from a place called Yggdrasil. I'd be surprised if anyone came looking for us, we were independent, though small."

"I've never heard of Yggdrasil before.  Do you have any idea how far it is from here?"

"Very. A lot's different, and I'd never heard of here. I wouldn't know how to get back."

"Amazing, what was it like there?"

"More non-human sapients around. More high leveled opponents. Good bit of competitiveness between the guilds."

"Sounds amazing.  I'd love to hear more sometime, but on to more pressing matters.  We're quite grateful for your help dealing with the undead, but how did you know what was happening?"

"I've been listening to rumors - trying to get a sense of what's going on here - and caught wind of someone collecting artifacts related to a concerning ritual. I decided to scry what was going on, and stumbled upon the forming undead army."

"Which artifacts?  The guards should have recovered any that were still on the cultists, but I haven't gotten the report yet and they may have missed some that were consumed or otherwise destroyed."

"It was a crown, on Nfirea, who was kidnapped by the leader. It was destroyed in the process of removing it, but I have its remains and the related items with me."

"The leader of our magician's guild and the mayor should be here coming with any items we recovered.  Would you mind if they examine what you found as well?"