"Monsters are not uncommon on the continent where Cheliax lies though I did not recognize the specific type. It's possible this is not even my planet, though my planet does have a monster-inhabited underground. At least some of it is not completely cut off, though, there are adventurers and raids going between."

"Monsters, common on the surface? Oh, that would be quite something." She reads frankly unbelieving in a grim and fatalistic way, even if she tries to only sound reasonably doubtful.

"Well, in any case, we oughtn't stand and talk here forever. I propose we make it to my house, young man, where I have chairs, books, tea, and many other conveniences."

"Very well."

They proceed further into the dungeon. Somehow, it's no longer as dark, and the surroundings are even less derelict and cavelike. They're also very purple for some reason.

"The Ruins are full of puzzles - ancient fusions between diversions and doorkeys. 

One must solve them to progress from room to room. Please, adjust yourself to the sight of them." - says Toriel, as she procceeds to step on a series of pressure plates, walking in a zigzag.

The door opens.

A sign by the side of the door says:

Only the fearless may proceed.

Brave ones, foolish ones - both walk not the middle road.

"Is the sign to be taken literally? And should I follow the same path you did?"

"Well, it is a hint for the puzzle, disguising a literal solution with a metaphor. The door have already opened and the puzzle solved, but I see no harm in taking the same path - if only for practice."

"I am not a paladin and accordingly not in the general case fearless, but I'm not sure I understand the hint at all so perhaps it's more complicated than that." At any rate he can zigzag like she did.

"The hint is that you should not step on the middle plates and touch the left and right ones, to walk 'not the middle road', disguised inside... an aphorism about life," explains Toriel as she goes through the next room, pulling levers marked beforehand with very conspicuous pointing arrows.

"Are these rooms traversed often by the people who live here?" He doesn't seem to think the levers obviously need pulling twice, if she's doing it first.

Yeah, they don't need to be pulled again.

"This particular section is something of the furthest point of the Underground, but yes. Some monsters do live here and those who do walk around as much as you would think."

They follow to the next room. It's rather small, a corner turn. There's a dummy inside.

"Speaking of that... As a human living underground, monsters may attack you. You need to be prepared for this situation."

"That is also the case where I'm from. I'm armed."

"Yes, I see that. Which makes me rather concerned, if anything. Someone could get hurt!"

"Someone could also get hurt if I do not defend myself against attack," Blai points out.

"Right. But, hopefully, you'd do well enough by stalling, waiting for my help, and simply talking it out.

They are all of them people, even if they pick a fight with you."

"Yes, people often pick fights with other people, and I would pray for their souls, but they should not attack armed people of unknown strength if they would prefer not to experience all the consequences of attacking armed people of unknown strength. I'm not planning to attack anyone who begins by negotiating."

"Quite. They should not attack people. Because violence does not result in anything good.

I do not think merely praying for someone's soul will be enough as they crumble into dust, so, please, make a good-natured attempt at talking this dummy out of a fight."

"Ma'am, I don't think we understand each other." It could be the Tongues effect misfiring, except that she does seem to be really gesturing at some kind of practice dummy. It's not impossible it's been enchanted to speak, perhaps it's genuinely intended as a training dummy for deescalation techniques, but really the fundamental disconnect here is that she seems to think he should perhaps not even have a weapon in an environment where monsters are likely to attack him. If she were just like 'the law down here is that monsters can attack humans and humans just have to try to talk them out of it, sorry, I don't make the rules' that would be one thing? Maybe she doesn't believe in afterlives for monsters, which might call for some differential caution? But she isn't saying that...

She squints, sternly.

"...perhaps we do not. And that is quite worrying. Hmm."

But soon after, she's back to a mostly cheerful demeanor with an obvious undercurrent of worry.

"Well, I suppose practicing peaceful resolution of encounters can wait for a little while. In the meanwhile, please, consider that the line between a monster who no longer wants to fight and a monster whose family is driven to grief can be thin, for the more reckless of us. It's... not always easy to tell. So, try to be careful, would you."

She sighs, turns, and walks into the next room.

"Is there a convention of surrender in circulation locally that I should learn, in case someone attacks me and then no longer wants to fight?"

YES ACTUALLY THEIR NAMES BECOME YELLOW

No.

Don't like the yellow names? Why, could I perhaps interest you in pink ones?

Do you realize how much this world would change if Undertale's user interface was actually, no-joke, not for a joke diegetic?

It is possible to recalculate it for that. It is entirely possible.

But then it would no longer be the story of a person making their way through the peoples and the tragedy of the Underground.

It would instead be a story about colliding with interfaces and nature of reality. Do we really want that? I don't think we want that.