“If you were taken from me, I would not be certain this world deserved to continue. That is the thing I am afraid of. Not the sword. Not the power. The fact that I am not entirely sure I would be wrong.”
Yumie (ユミエ) is a Spirit born from the essence of the First Spirit, Mio Takamiya — a sister by origin to Hana, Hikari, Hotaru, and the others who carry that shared inheritance. Her Reiryoku output, measured and categorized on arrival, registered at B-Class — a number so unremarkable by Spirit standards that the Fraxinus crew initially questioned whether their equipment had malfunctioned. She is identified by the AST under the codename Veil.
It had not. The reading was accurate. It was also, as the aftermath of her Inversion would eventually make catastrophically clear, a number Yumie had produced deliberately — the result of sustained, voluntary suppression of a Reiryoku reserve that had no business being contained at all.
Unlike Hana, whose power lies dormant by temperament, or Hikari, who operates under Ratatoskr’s protocols with careful precision, Yumie’s restraint is neither peace nor procedure. It is discipline applied to something she does not trust herself with, maintained not because she is calm but because she understands exactly what becomes available to her when the calm fails. Ratatoskr has a name for that contingency: the Wraith. They assigned it low probability. The event records from Tengu City do not agree.
She arrived in Tengu City carrying a katana she has not drawn since. She does not plan to.
Story
The Veil’s Arrival
The spacequake that announced Yumie’s arrival was smaller than Hana’s — conspicuously so, almost considerate in scale, as though she had done what she could to minimize the disruption. When Ratatoskr’s instruments locked onto the signature and the AST scrambled to intercept, the crew aboard the Fraxinus fully expected combat footage. What they got was a Spirit in a quiet district who appeared to have already assessed the situation, identified Ratatoskr’s presence on the monitoring feeds, and — rather than meeting the AST with her blade or her Reiryoku — simply waited for Ratatoskr to do something about them.
The request was wordless and entirely clear: you handle this. She did not draw. She did not power up. She stood with her hand near the hilt of her katana and explicitly chose not to use it, which in Ratatoskr’s experience was considerably more interesting than anything she might have done with it.
Shido was deployed for first contact. He had, at this point, developed something of an instinct for how these went — a specific atmospheric reading assembled from body language and the quality of silence over the Fraxinus comms — and by the time Yumie had been listening to him for thirty seconds, the instinct had already filed its report.
She was courteous about it. She heard him out with genuine attention, considered what he was doing with what appeared to be real respect for the effort involved, and then explained — with the specific gentleness of someone who understood that clarity was the kinder choice — that she was not interested. Not in him, not in the framework he represented, not in the kind of connection the sealing protocol was built around.
The affection meters registered as not applicable. On the Fraxinus, someone exhaled. There was, by now, not much else to say.
Shido thanked her and withdrew. Kotori had the backup protocols already open.
Finding Ground
What followed was unusual by any measure Ratatoskr had available. Integration was offered; Yumie did not require it to be offered twice, but she also declined to be integrated in the way most Spirits were — surrounded by support structures and guided toward stability from the outside in. She was already oriented. She had assessed the city, determined what she needed in order to remain in it without incident, and began taking practical steps before anyone had finished briefing her on the resources available.
She found an apartment. She enrolled at a school. She explored the city on her own terms and at her own pace, with a methodical interest in understanding how it worked that Ratatoskr’s analysts classified, somewhat helplessly, as initiative. The monitoring remained in place; she was aware of it and did not object. She did not need someone to tell her where to go. She needed the world to remain navigable, which it did, and she went into it.
This was not what their models had predicted. Most Spirits required some period of active stabilization. Yumie simply began living, which turned out to be a more effective stabilization method than anything Ratatoskr had designed.
Among the Spirits
The other Spirits entered her life gradually and on Yumie’s own terms, which primarily meant they entered it when she allowed them to get close enough to try. Hana she met through the Ratatoskr network early on — a sister in the technical sense, warmer in practice than Yumie had quite expected, whose honesty did not require decoding. Hikari, more careful and precise in her own way, took longer to establish anything resembling a genuine pattern of exchange. Hotaru she understood before Hotaru particularly wanted to be understood, which Yumie handled by keeping the knowledge quiet and waiting.
She did not join the group the way Miku had immediately and forcefully absorbed Hana. She was present at the edges first, then further in, the gradient so gradual that looking back, no one could identify the precise moment she had simply become part of it. This suited her. It may have been intentional.
Mukuro
Mukuro Hoshimiya had a particular way of existing around people — guarded in a way that was not unfriendly so much as practiced, as though at some point she had learned to maintain a careful distance between herself and anything that might subsequently leave. Yumie recognized this immediately, and said nothing about it, which was the first thing she got right.
She was not strategic about it. She let Mukuro be what she was without requiring her to be otherwise, and sat closer than most people did without making it a statement, and at some point this became spending time together in a way that neither of them formally named until after it had clearly already been something for quite a while. The first kiss happened quietly, which is the way Yumie preferred things to happen. She has not said much about it since, which Mukuro appears to understand.
A Crack in the Stillness
The deployment was routine. Yumie was positioned outside, securing the perimeter, while Mukuro handled the interior. It should have remained unremarkable.
Mukuro took a light hit — a glancing blow, barely worth noting in the debrief, the kind of thing that gets two words in an incident report and nothing more. Yumie saw it happen. Her hand moved to the hilt of her katana before she had any conscious awareness of moving it, and for a period that Ratatoskr’s instruments later calculated as approximately two seconds, the Fraxinus registered a Reiryoku spike of a magnitude that did not correspond to any reading they had on file for a B-Class Spirit.
Then it stopped. Mukuro was fine. The perimeter was secure. Yumie’s hand was no longer near her katana. The instruments returned to baseline, and everyone present — on the ground and aboard the Fraxinus — chose, in that moment, not to mention it.
Kotori mentioned it the moment they were back aboard.
The discussion that followed was tense in the specific way that discussions are tense when everyone in the room understands the implications and no one is ready to say them plainly. What the instruments had shown was a Reiryoku reserve that had no business belonging to a B-Class Spirit. What the instruments had also shown was that it returned to baseline in under two seconds — which was either evidence of extraordinary control or a transient malfunction, and the temptation to accept the latter explanation was, on this occasion, extremely strong. They accepted it. The reading was filed as anomalous, one aberrant data point was not a pattern, and the case was kept open with no active flag. Yumie’s subsequent metrics remained entirely unremarkable.
The Calm Before
After the incident, Yumie registered as unchanged across every metric Ratatoskr measured. She continued her routine. Her time with Mukuro deepened without announcement into something both of them had stopped trying to treat casually. She attended deployments without incident. She kept her hand away from her katana.
The crew aboard the Fraxinus did not stop watching the instruments, but the weeks passed and the instruments remained quiet, and the quiet accumulated in the way quiet does until it stops feeling like a held breath and starts feeling like the absence of anything worth holding your breath about. Ratatoskr classified her as stable. This was accurate, as far as it went.
When the Building Fell
The deployment was supposed to be straightforward. Yumie was outside covering the perimeter; Mukuro had gone in. She saw the building come down.
There was no warning, no structural tell she could have read in time, no window between the moment it began and the moment the entire section collapsed in a single, catastrophic failure that sent dust and debris billowing across the street. Mukuro had been inside.
What Ratatoskr’s instruments recorded in the next ninety seconds was later described by their analysts, inadequately, as a cascade. The B-Class baseline did not spike — it vanished, replaced by a reading that their equipment was not calibrated to handle, climbing through designations their systems could barely parse before the automatic scaling collapsed entirely. The spacequake formed faster than any they had logged from a Spirit of any recorded class.
Inside the rubble, Mukuro had survived the collapse with minor wounds and was already moving toward daylight. This information was available to Ratatoskr. It was not available to Yumie.
To her, Mukuro was dead. The building had fallen and taken her, and the reality that had constructed itself around that fact was no longer one she recognized as worth remaining in.
Wraith
The Inversion was not a loss of control. That framing, which Ratatoskr used in their initial incident reports, is the wrong way to understand what happened.
What happened was that Yumie reached a specific conclusion: if this world was one in which Mukuro could be taken from her, then this world was not the real one. The real world — the one she lived in, the one she had built, the one she had allowed herself to want something inside of — had Mukuro in it. This world did not. Therefore, this world was an illusion, and a Spirit whose entire mode of restraint was predicated on the world remaining navigable had decided the world was no longer navigable and responded accordingly.
The katana that had not been drawn since her arrival came out of its sheath.
The spacequakes she spawned across Tengu City were methodical, not frantic — she was dismantling what she had concluded was a false construct, and she did so with a patience that was somehow more frightening than rage would have been. Ratatoskr’s instruments finally locked onto an SS-Class designation, the same one they had declined to believe two weeks prior.
When Mukuro was pulled from the rubble — cuts, dust, a bruised shoulder, minor wounds — she walked into the blast radius herself. She was met with a calm that was worse than any grief. Yumie looked at her, and through her. This was not Mukuro. Mukuro was gone. This was a projection of the false reality she was in the process of dismantling, and she said so, and continued what she had been doing.
Mukuro tried words. She tried proximity. She tried every identifying detail she had — shared memories, specific conversations, the particular way Yumie held her when she was tired. Each was received, assessed, and rejected: a sufficiently sophisticated simulation would include all of these things. They were not evidence. They were exactly what a false reality would construct. The other Spirits were denied deployment at Mukuro’s request. The Dainsleif charging cycle began. Mukuro went back in alone.
The Shape of Her
Mukuro had already worked through the problem by the time she re-entered the blast radius. Words would not work — words were fakeable, every detail she could name was fakeable, the entire system of evidence was subject to rejection because a sufficiently detailed simulation could reproduce any of it. She understood this. She had, at some point in her own past, understood something structurally similar from the inside.
She walked toward Yumie and kept walking. She was rejected. She kept walking. She said — later, she was not entirely sure of the exact words, something direct and unhappy — that Yumie should already know it was her. Then she closed the distance, and kissed her.
The katana did not move. Yumie went entirely still, with the specific quality of stillness that descends on a body when the one thing it has been told does not exist turns out to be present, real, and unmistakable in the way that some things cannot be simulated because the simulation cannot know what to replicate. The blade dropped. It hit the ground and the sound of it was the only thing anyone within range heard before the spacequakes stopped — all of them, simultaneously, like a string going slack.
Yumie went to her knees. She was holding Mukuro before the dust had settled. The Dainsleif countdown was terminated at four minutes and twenty-three seconds remaining.
When Yumie told Mukuro, afterward, that the fear would not fully go away — that she could not guarantee this would never happen again — she said it directly, because she believed Mukuro was owed that honesty. Mukuro told her she would be more careful now that she understood what was at stake. Then she said, with a steadiness that surprised no one who knew her well, that she also now knew exactly how to bring her back should she ever need to again.
What Remains
Tengu City sustained damage across eleven city blocks. The incident entered Ratatoskr’s records as their highest-impact spacequake event since an SS-Class Spirit’s first arrival.
The post-incident analysis took longer than the incident itself. Yumie’s Reiryoku reserve, now fully documented, sat in a classification range that Ratatoskr’s existing systems had no meaningful framework for, because Ratatoskr’s existing systems categorized Spirits by output — by what their instruments measured coming out, not what might be waiting behind it. A Spirit who chose to suppress her output could register at any arbitrary fraction of her actual reserve, and the instruments would report that fraction faithfully, and the categorization would be wrong, and no flag would ever raise itself to say so.
The case file they had closed as a single anomalous reading was now the most significant predictive failure in their recent operational history. Their method of ranking only Reiryoku output — rather than potential or reserves — had nearly cost them the city. If a Spirit were to suppress deliberately, as Yumie had, they would have no way of knowing until it was already too late.
Interactions
Mukuro
Yumie does not require people to be comprehensible to her before she allows them to be close. She had required it, once — she had her reasons, and they were sufficient — but somewhere between her arrival in Tengu City and her first extended conversation with Mukuro Hoshimiya, she stopped applying the requirement and found the absence of it did not feel like loss.
Mukuro’s particular mode of guardedness she recognized from the inside. She did not say this to her. She did not say much about the things she recognized, not early on, because saying it would have made it a project, and a project would have required something from Mukuro before Mukuro was ready to give it. So she sat nearby and was quiet when quiet was the thing needed and present when presence was what she had to offer, and let the rest develop at whatever speed it developed.
When they talked about what happened — afterward, once the city was being inventoried and Yumie’s readings were being re-filed — Mukuro did not say she wasn’t afraid. She said that she now knew a method to bring her back, and said it with the particular steadiness of someone who has decided where they stand and is not interested in being moved. Yumie found this more comforting than any reassurance would have been.
The Spirits
She entered the network of her sisters carefully and remained in it without advertisement. Hana she found immediately legible — warmer than expected, less careful about her own weight than she probably should be, honest in a way that does not require decoding. Hikari she watched at a longer distance for some time before the distance began to close by mutual, incremental consent. Hotaru she does not talk about in group settings, because the things she understands about Hotaru are not hers to name in those settings.
She appears at shared meals more often than she does at coordinated plans. She is available without being present at all times, which the people she has been folded into have learned to interpret correctly.
Shido
She does not hold the initial contact against him. He was doing his job and performing it reasonably well within a protocol that simply did not apply to her, and he accepted that fact with more grace than the situation typically demands. What remains is something functional and specific: they share a social circle and a mutual investment in the same network of people, arrived at through proximity and goodwill rather than design. He does not try to be more useful to her than he is. She finds this appropriate.
Kotori
Kotori told Yumie, in the post-incident debrief, that she had terminated the Dainsleif countdown at four minutes and twenty-three seconds. She said it as a number, without editorializing, which Yumie recognized as the correct approach.
Yumie told Kotori, in the same debrief, that she could not promise this would not happen again. She said it the same way. They understood each other.
What they have built since is not warmth exactly — it is mutual clarity about what each of them is dealing with and what each can reasonably be expected to provide. Kotori keeps Yumie’s threat profile in a separate category from the other Spirits, not because Yumie is less trusted but because the category requires it. Yumie reports directly when she has information that affects operational safety, because she understands that Kotori is the person whose job it is to act on that information. This arrangement suits both of them.
Abilities
Angel: Sachiel
Sachiel manifests as a katana — its blade translucent, carrying the faint iridescent shimmer of compressed Reiryoku at extreme density, its edge far sharper than any physical blade and far more durable than the form implies. The weapon is precise in the way a precision instrument is precise: every specification in service of a specific purpose, nothing in excess of it.
The katana has not been drawn in combat since Yumie’s arrival in Tengu City, which means all practical data on its capabilities is derived from the ninety-minute Inversion event that Ratatoskr does not plan to replicate. The spacequakes generated during that period — eleven city blocks, an unprecedented damage radius for the event window — were produced while Yumie was operating without any intention to optimize. She was dismantling what she believed to be an illusion, not fighting. The ceiling on what Sachiel might achieve under controlled deployment is, as a result, genuinely unknown.
Ratatoskr’s formal assessment reads: Capabilities insufficiently characterized. Subject cooperation with assessment not guaranteed.
Demon King: Balam
Balam shares Sachiel’s form — a katana — but where Sachiel’s blade carries clarity, Balam carries something that does not resolve into clarity at all. The blade absorbs light in a way that makes it difficult to track visually. Contact with Balam does not produce clean cuts; the corruption radiates outward from the point of impact in a pattern more analogous to a shockwave than a wound, which Ratatoskr’s structural analysts found relevant to several of the damage reports from the incident.
The Inversion did not change the shape of what she carried — only what it did. Ratatoskr’s personnel noted this with some unease. The weapon is identical. The wielder is not.
Reiryoku Suppression
This is not classified under any ability category that Ratatoskr’s existing schemas contain. It is, as precisely as they can describe it, a decision Yumie has been making continuously since her arrival, to the extent that Ratatoskr had no idea she was making it.
The B-Class reading their instruments produced on first contact was accurate. It was also the reading of a Spirit who had decided, before arriving, how much of herself she was willing to show to instruments she had not yet learned to trust. As those instruments logged stable readings across the following months, the number they were logging was the number she had chosen to offer — not the number that was there.
The revised threat assessment produced after the incident is not published in Ratatoskr’s standard operational documents, because the operational implication of the revision — that any Spirit could in principle present an arbitrarily reduced reading if they chose to — is not one they have finished working through.