"Home sweet home," she mutters when they reach the cliff's base, then - "I'm not actually sure how to get up this the regular way, but there's a small ledge halfway up, I can walk to it and you can - teleport or something?"

"You have very interesting powers.

I need some way to locate it."

"Thanks. I'll head up, and stop on the ledge, then you can follow after me."

And she blurs, moving faster than the unaided eye can see, running up the cliff and coming to a halt on a small ledge. She waves to Lee from her perch; there's enough room next to her for another person.

Very interesting powers.

She translocates.

Rian nods at her, then turns to the cliff-face - just as a section of rock shimmers and then moves inward, swinging up. There's a red-headed woman standing beyond. Rian smiles at her. 

"Mariko! I'd have thought you were too busy to play door guard."

"Not when I heard we have an interdimensional visitor, I'm not. Come on in, I don't sense Zetsu anywhere near." And she steps to the side and back.

Once they are finished with guard protocols and the like, she will need to enquire about their communication method.

And that positioning seems to be an indication that guard protocols take place after entry. Likely not desirable to keep the entrance open long. She steps in.

The guard - Mariko - looks evenly at Lee once the door closes. There's no one else visible in the entryway, though there's a closed door at the end of the hall.

"I'd like you to answer a few questions, if you don't mind. I will know if you're lying, or otherwise trying to deceive me. To the best of your knowledge, you appeared in front of Rian in an interdimensional travel accident? Before coming here, did you know of Kaguya or Zetsu? And do you have any ill intentions towards the inhabitants of this mountain?"

She looks evenly back. 

"No to the second.

To the best of my knowledge I appeared in front of Rian due to being transported between dimensions through no intent of my own.

No to the third."

(This is clearly not the time for inquiries and compare contrasts of truth magic approaches, though she is curious.)

"Before Rian, have you had contact with anyone from this dimension?"

"Not to my knowledge."

To Rian, "Telling the truth, far as I can sense. And her chakra's - off. Not quite like people from this world, which supports her story." To Lee - "Is there anything you need urgently?"

"Not that I'm aware of.

You're welcome to ask some control questions if you would like more certainty your method works correctly on me."

"Hm. Did you tell Rian to call you Lee? And lie on this one: what color is the sky?"

"I told Rian that I can be called Lee. The sky is green with purple spirals."

"Registering normally. Do you have any questions for us?"

"Yes, of course."

"Why don't we head somewhere more comfortable? I'll call someone else up to watch the door."

She will follow.

The 'somewhere more comfortable' is a room off the next hallway, with mats piled on the floor and a low table in the middle. Mariko splits off from them for a bit, presumably to talk to the next guard.

Rian sits at the table and turns to Lee. "Do you have any questions for us?" she asks.

They have not yet indicated they have particular expectations of formality. She also sits.

"Yes, of course."

Rian doesn't seem to notice any breach of formality. 

"What are they?"

"More thorough information about the current situation, preferably with permission to use a truth spell for confirmation. That which is relevant to myself personally - you've been very trusting and welcoming of an utter stranger and while I of course personally appreciate it I am curious about your approach and about what if anything you might desire me here for. Your powers system - it seems that you have both long-distance communication and truth detection of your own, and I'm curious how they operate. 

That seems to be the immediate level, for the present."

"Okay. Is the truth spell non-invasive? I have secrets I'd rather keep."