He did not answer immediately.
Not because he had forgotten how words worked, although standing in front of her had briefly created conditions where that felt like a genuine risk, but because the voice had triggered something else entirely — a cascade of association that his mind, still running hot from everything that had happened in the last eighteen hours, immediately pulled toward the larger context of what she was. What her existence here, behind a market stall counter in Sector 741, meant about the world he was standing in.
Rabbit-kin. Beastfolk. One of the Evolved races.
He had grown up around Evolved race individuals the same way he had grown up around everything else in this sector — with a familiarity that came from proximity rather than from real understanding. There were beastfolk families in his building. There was a lizard-kin man who ran the equipment repair shop two streets from the apartment and who had, on three occasions, fixed things for Shiro's grandfather at a reduced rate because the old man had apparently done him a favor years ago that neither of them ever fully explained. The market district had always had a mixed population, humans and Evolved races operating side by side with the kind of pragmatic coexistence that high-risk sectors tended to produce because survival was a more pressing organizing principle than any social friction that might otherwise have kept people separate.
But familiarity was not the same as understanding.
And lately, in the months before his grandfather had died, Shiro had been reading more carefully. Paying attention to what the books on that shelf actually said versus what the general social understanding of the Evolved races amounted to, which was, when examined honestly, not very much.
He thought about it now, standing there, filling the brief silence that her question had opened with the involuntary processing that his mind did when it was given a thread worth pulling.
The story that most humans told about the Evolved races was a story that began five hundred years ago, with the rifts, which was where most stories began now because the rifts were such a convenient starting point — a clear before and after, a dividing line in history so dramatic and so total that everything prior to it had taken on the quality of mythology rather than fact in the popular imagination. The rifts opened, the monsters poured through, humanity nearly ended, essence seeped into the world, people began to absorb it and awaken to talent. That was the human story. Neat, contained, beginning with catastrophe and moving through survival toward the current complicated present.
The Evolved races were usually inserted into that narrative as a discovery — something that humanity found, or rather that humanity found it had been wrong about, during the tumultuous period of the Martial Era's early decades when the Alliance was still being assembled from the wreckage of previous social structures and the surviving human population was still trying to understand what the world had become. The Evolved races had been there all along, the story went, but the curtain had kept them hidden.
That was the phrase that appeared in every account, in every history text, in every educational material Shiro had ever encountered on the subject. The curtain. Always referred to with a specific quality of vagueness, as though the writers were not entirely sure what they meant by it and had collectively agreed to leave it slightly undefined rather than commit to an explanation that might turn out to be wrong.
He had never been satisfied with the curtain as an explanation. His grandfather had noticed this about him early.
"You make that face when the book isn't giving you enough," the old man had said once, sitting in the chair by the window, not looking up from his own reading.
"The curtain doesn't make sense," Shiro had said. He had been fifteen, freshly returned from the awakening clinic with his F rank result and perhaps more inclined toward argument than usual as a result. "It says an invisible curtain kept the human population from perceiving the Evolved races. That's not an explanation. That's a description of the mystery restated as if it answered something."
His grandfather had made a sound that was not quite agreement and not quite disagreement. "What would satisfy you?"
"A mechanism," Shiro had said. "Why couldn't we see them? What was the curtain made of? Why did it fall when the rifts opened?"
The old man had been quiet for a moment. Then he had said, in the way he sometimes said things that turned out later to be more significant than they appeared at the time: "The curtain was made of the same thing everything else is made of, in the end. You'll understand it better when you understand essence better."
He had not understood what that meant at fifteen.
He thought he understood it somewhat better now.
The Evolved races did not absorb essence the way humans did. That was the fundamental difference, the thing that the biology texts stated clearly even when the history texts were being vague. Humans had been, prior to the Martial Era, essentially essence-blind — not incapable of absorbing it, as the awakening process demonstrated, but unawakened to it, living in a state of passive non-interaction with the energy that permeated the world. They breathed it without processing it. They moved through it without sensing it. They were, in essence terms, inert.
The Evolved races were not inert.
The Evolved races had never been inert.
They did not merely absorb essence — they required it, the way lungs required air, the way cells required water. Essence was the medium through which their biology functioned at every level, from the macro scale of their combat abilities and their talents down to the cellular processes that kept them alive and coherent as organisms. A region with insufficient essence density was not merely uncomfortable for an Evolved race individual — it was hostile in the way that a vacuum was hostile, a slow resource deprivation that would eventually become an existential threat.
And this, he had come to understand, was the mechanism behind the curtain.
Before the rifts opened, the world's ambient essence level had been low. Not absent — the energy had always been present, threading through the ground and the air and the living world in concentrations too diffuse for human perception — but low enough that the Evolved races, who needed it to survive, had been forced to cluster in the places where it was densest. Deep wilderness. Mountain ranges of specific geological composition. Oceanic regions. Underground systems. The places, in other words, that human civilization had not meaningfully penetrated, and where human civilization, when it occasionally sent explorers, found conditions hostile enough to explain any strange experiences without needing to invoke the existence of entire other peoples.
The curtain had not been a deliberate concealment. It had not been a conspiracy or a magical barrier or a divine intervention keeping two populations ignorant of each other. It had been geography. It had been the shape of need — the Evolved races going where essence was sufficient and humans not following because there had been no reason to follow and some very good reasons not to.
Then the rifts opened.
And the essence level of the entire world changed in the span of a generation.
The rifts poured monsters through, yes — that was the catastrophe, that was what nearly ended humanity, and it was real and it was terrible. But the rifts also poured essence through, in concentrations that dwarfed anything the world had previously sustained, and that flood of energy had done two things simultaneously. It had reached the Evolved races in their distant high-essence sanctuaries and driven them outward, into regions that were now suddenly suffused with enough energy to sustain them anywhere rather than only in specific refuges. And it had reached the human population, which had been stumbling through the monster crisis with no tools to fight it, and forced an awakening — the rapid, involuntary development of essence sensitivity in people whose ancestors had been essence-blind for the entirety of recorded history.
The curtain did not fall. It dissolved. It dissolved because the conditions that had created it no longer existed.
And humanity had looked up from trying to survive the monsters and found that the world was much more populated than they had believed.
This was the part of the history that the texts moved through quickly, in the way that texts moved through things that were uncomfortable to examine too closely. The meeting of humanity and the Evolved races in the early Martial Era had not been peaceful. How could it have been, in the context of a world that was simultaneously dealing with monster incursions and the complete restructuring of what it meant to be a living person in relation to energy and power? There had been conflict. There had been violence in both directions. There had been the specific cruelty that came from fear encountering the unfamiliar when both parties were already pushed past their limits.
The Alliance had eventually created a framework. It had taken decades. The framework was imperfect in ways that anyone paying attention could see clearly — it produced coexistence more reliably than it produced equality, and the distinction between those two things mattered enormously if you were on the wrong side of it. The high-number sectors, Shiro had noticed over years of observation, tended to have higher Evolved race populations than the lower sectors, which was not coincidence. The dangerous areas, the areas that humans with options tended to leave, were the areas where the essence density was highest because of rift proximity, and the Evolved races, who needed high essence density to thrive, had found that the places humans were vacating were the places they could live most fully.
This sector. This market. This stall.
There was something clarifying about understanding that fully — not as a social fact to be acknowledged and moved past, but as a reality with specific implications. The girl standing behind the counter had not ended up here the way a human might end up here, through the series of economic contingencies and limited options that characterized life in Sector 741 for most of its human residents. She was here, in the most fundamental sense, because this place had what she needed to be alive. The essence density that made Sector 741 dangerous for humans was the same essence density that made it habitable, in the deepest sense, for her.
And she had spent years, or her people had spent centuries, understanding essence in ways that humans were still working out the basics of.
That was the other thing the texts mentioned and then moved past too quickly. The Evolved races had not been stumbling through an awakening process five hundred years ago. They had not been learning, in real time, that essence existed and that it could be channeled and used and cultivated. They had been doing those things for longer than human civilization had maintained written records. The techniques that the Alliance's research divisions were still working to codify and standardize — the Evolved races had traditions around those techniques that had been refined through generations of practitioners who had understood essence as a fundamental fact of their biology rather than as a discovery.
They were not ahead of humanity because they were inherently superior. They were ahead because they had started earlier and had never had the option of not paying attention.
He thought about that — about what it would mean to grow up in a culture where the relationship with essence was assumed rather than discovered, where the techniques were not being invented but transmitted, where the oldest practitioners were not five hundred years into understanding something but potentially thousands of years into it.
What had they seen, in all that time? What had they understood that humanity was still formulating the right questions to ask?
He looked at the girl behind the counter, who was still waiting for him to respond to what had been, objectively, a simple and reasonable question asked by a market vendor to a potential customer, and he felt the full weight of everything he had just moved through in the space of whatever silence had elapsed since she had spoken.
'I have been standing here thinking about the philosophical implications of five hundred years of history,' he thought, 'instead of answering a straightforward question, and I need to stop doing that immediately.'
He straightened slightly in the oversized coat and looked at the display counter with what he hoped was the expression of someone who had been evaluating the merchandise all along rather than traveling through an extended internal lecture on the geopolitics of the Martial Era.
"Yes," he said, and his voice came out steadier than he had expected, which was a small relief. He met her eyes for precisely long enough to be normal about it and then directed his attention to the display in a way that he intended to read as professional interest. "I would like to purchase a monster corpse."