Assuming it seems there's not some division where only some people get food, she will also cross to the buffet. Scan the food for relevant information, take a comparable amount to what seems in the the standard range. 

No one tries to stop her.

The food is plain, mostly made up of the sort of thing that stores well - white rice, dried and smoked or pickled fish, various pickled vegetables and fruits, dried seaweed. There's a low variety available at the moment.

That's fine. She selects by nutritional requirements and returns to sit.

A few people glance over at her over the course of the meal, apparently recognizing a new face and at least vaguely curious.

A bit into the meal, the white-haired man from earlier walks in, Tetsuma, and walks over to her after spotting her.

"Hey. Did you find what you were looking for?"

She notes them, but won't currently come over if they do not do so first.

"Hello.

Yes, I believe I have. We arranged to meet after dinner."

"Good! Do you want company for dinner?"

"I don't mind, thank you."

"Alright, I'll be right back." He fetches food then sits across from her, and launches into light chatter about the base. He knows a lot of people, it seems, and is at least mildly curious about how she spent her day.

The base and people are of interest.

She can conversationally describe her day.

He recognizes the boys mentioned, comments that at least they seem to be getting along, and asks questions about what she read that shows a good familiarity with the contents of the library.

Getting along?

Are there any readings he would recommend or that she should take special note of?

Can he clear up any questions she has from reading, such as origins of the Sage's chakra knowledge, the Kaguya(s), and the moon?

Ah - yeah, the Tobirama and Madara take being different clans personally. Though Madara seems mostly annoyed by Tobirama in particular, he doesn't mind Tobirama's brother Hashirama.

He can recommend a few books that're good overviews, from slightly-less-biased sources. The Uzumaki have great records, and they've generally been better about staying out of all the drama on the mainland.

Okay, so - that stuff's not going to be in the library, he only knows anything about it because Rian doesn't really have a concept of 'clan secrets' and Mariko isn't apparently aware of what secrets are at all. It's not secret anymore, of course, but what had been known had been entirely a few clans' most treasured records, and there's probably gaps in their knowledge that could be filled in by things people are still hiding.

But, for what they know (and some of this is from Kaguya herself, apparently she stopped to rant at Rian at one point), Kaguya's actually from another dimension. She came here in search of the God Tree, married the leader of a major nation, and there was Drama that apparently convinced her humans are nonredeemable. She ate the fruit of the God Tree at some point, granting her chakra; her two sons were the first people born with chakra, and after she decided to take over the world the oldest was the one to notice that she was sacrificing people or something? He and his brother confronted her, she realized they had chakra and freaked out, a battle ensued. She turned the God Tree into the Ten Tails, and her sons eventually sealed her and the Ten Tails's body into the moon, the Ten Tails' chakra being sealed into the Sage himself. It's unclear if the moon existed before that or not. The Sage had two sons, Indra and Asura, who after his death fought over his legacy. Indra fathered the line that led to the Uchiha and a few other clans, Asura the line that led to the Senju, Uzumaki, and a handful of others. The Sage's brother fathered a line that led to the Hyuuga. The Kaguya clan are also descended from Kaguya somehow, they have her bone-manipulation abilities, but the records of how have been lost.

She accepts book recommendations and thanks him.

Interesting. Why particularly was it secret?

She sees.

Stopped to rant at Rian? 'Nonredeemable'?

Is anything about the other dimension known? The God Tree was present 'pre-chakra' then? He said 'born with chakra', but in the book it was said he 'taught' - did everyone else get it too, despite their lack of 'heritage'? ...Does she herself 'have chakra', being also from another dimension? (Also, what exactly is meant by 'having chakra', in the 'granted' and 'born with' sense? Rian had said "which flows within every living being - and arguably within the non-living, too" - had this not been the case before, or does 'have chakra' actually refer to being able to do the manipulations?)

Does the Kaguya history suggest anything about how secret her own origin should be kept, in the sense of whether people might assume she's here to do something similar?

The Sage is one of the brothers? 'Chakra sealed into'?

Did she get unsealed from the moon, then? And where did the current God Tree come from, then?

Bone-manipulation abilities?

Mostly because the clans are in the general habit of secrets, and the actual texts either revealed or hinted at deeper clan secrets, like techniques.

Kaguya is, apparently, a complicated person, who used to want to bring peace to the world but decided that the world can't have peace as long as humans are on it. Rian is descended from her, and at least somewhat resembles her son and grandson, which is presumably part of why Kaguya pays more attention to her than to others.

They don't know anything at all, except that Kaguya wasn't alone at first. They actually have no clue whether chakra was present before the God Tree, or exactly how it spread post-Kaguya, or why she has chakra, too.

Kaguya's history isn't broadly known since most people simply aren't interested, and people are unlikely to associate one with the other, though it's possible someone would make that leap. Her world and magic sounds dramatically different from Kaguya's, though.

The Sage is one of Kaguya's sons, yes. The Ten Tails' chakra sort of - contained an imprint of it, so the Sage essentially sealed its mind and soul into himself? On his death he split it into nine parts, which formed the bijuu.

Yeah, someone - they're not entirely positive who - gathered the nine bijuu and combined them back into the Ten Tails and somehow used that to unseal Kaguya. Kaguya turned the reformed Ten Tails into the God Tree when she cast her illusion over the world, it's regathering chakra and distributing it to her they think.

Kaguya can grow her bones at incredible speeds and use them as weapons. Hers turn anyone they hit to ash, the Kaguya clan's didn't do that.

Wonderful. She doesn't expect the Reynans to consider that adequate justification for trying to take over this world's organization herself, but it would certainly make a list of reasons to. 

...Is there a particular way Kaguya envisions this peace?

Wasn't alone?

Yes Kaguya is clearly not actually from her world.

Bijuu?

(Well she supposes she can see Kaguya's reasoning there. She keeps that to herself.)

She notes to herself to avoid being hit by relevant bones, should this become applicable.

Again, does 'have chakra' actually refer to being able to do the manipulations? 

And does he know where these lovely folktales of 'Princess Kaguya' come from?

They're not sure. Maybe just nature existing without humans. Maybe everyone in her illusion, docile and happy.

Kaguya has a clan, who live in another dimension. They're not sure where, but it's not nearby. 

The bijuu are - well, were - the tailed beasts. They were malevolent chakra constructs that would attack anyone who angered them, or got in their way, or looked entertaining.

'Have chakra' refers to having the energy itself when he says it, but most people mean having it in enough quantities to be effectively usable by someone without incredibly good control.

Those folktales are old, he's not sure by how much since he's not a scholar. They might be reinterpretations of Kaguya's history, remnants of what people knew about her. They might predate her, and she took the name of the titular princess to be ironic - her name is in their language, which is incredibly strange if it's her birth name and not something she assumed when she arrived here.

Is there a threat of the clan arriving here as well?

Does "or why she has chakra, too" mean that she has the energy, or has it in those quantities, or is likely to be able to also learn to manipulate it, or something other than those?

Interesting.

She performs the examination with her translation spell that will tell her what the name means.

Honestly? No idea. It seems unlikely, Rian was told that she'd cut ties, but Rian got her information from a vision of a long-dead ancestor so they're taking it all with a grain of salt. More hopefully, the rest of the clan hasn't come looking for her in nearly a thousand years, and Kaguya hasn't called on any of them yet.

She has it in enough quantities to manipulate, and it feels usable.

('Kaguya' loosely means 'shining,' though her spell informs her the word is archaic and no longer in common use.)

"a vision of a long-dead ancestor"?

That is very useful to know.

Kaguya's eldest son, who according to every scrap of history they can find was the one to seal her in the first place, is Rian's great-great-great... something. And can apparently appear to people in visions. He's very probably on their side.

By the 'apparently' she has the impression this is not generally common in this world? Has he appeared to other people? How does one distinguish a vision from a dream or similar?

Possibly appeared to Emi, Rian's sister. Two others claim to have seen him. Rian at least got a major and rather sudden power-up after her vision, and several of their sensors felt a strange presence around her at the time. Ancestor visions hadn't been documented, but they're the type of thing that happens in old stories. The visions don't feel like dreams, and he evidently gave off chakra like a real person. Also everyone who's had one was awake at the time.

A power-up?

And, does their magic system include a mechanism by which such a thing might happen, or is it unknown?

Her current level of magic eye bullshit is a very recent development.

Theoretically you could leave behind a chakra imprint after your death? There's been some thought that autonomous solid clones are possible, it might be something like that. And then the contact could work through a mental technique similar to the Yamanaka's. Or there's also a known phenomenon where two people with compatible chakra systems will sometimes have spontaneous mental contact, usually during a fight or similar event causing synchronization, he might be developing off that.

Magic eye bullshit?

(She will take that for a 'they don't really know'.)

Regarding the subject, does he know more about these mental techniques? Rian had mentioned not knowing details.