"Your turn. Find your primary frequency. Let it light the grid. We'll map your attunements from there."

  Forty-seven students closed their eyes. I closed mine.

  The Flux in my channels was already carrying its base frequency: the synthetic Core's default output, which didn't correspond to any single biological band. It was all of them. The Core's unbiased processing distributed energy across every frequency simultaneously, the same way it distributed Flux through every channel simultaneously. No preference. No specialization. No lock.

  I needed to produce one frequency. One color on the grid. The frequency that a C-grade late-manifestation Hollow would naturally attune to.

  I focused on the defensive band. Pushed the Flux through my channels at the blue frequency. The channels accepted it without resistance because the channels accepted everything without resistance, and the grid panel beneath my feet lit blue.

  Easy. Too easy. The biological students around me were struggling to find their primary frequency, their Cores stuttering between bands as the pre-shaping competed with conscious intent. The D-grades were producing muddy colors — brownish reds, grey blues — that indicated imprecise attunement. The B-grades were cleaner but still working to stabilize their output into a pure color.

  My blue was pure. Immediately. The grid panel was a solid, saturated blue that indicated perfect attunement to the defensive band with zero spectral bleed.

  Breck noticed. I saw her head turn from across the hall, her attention redirecting toward my grid panel. She walked over. She looked at the blue. She looked at my meter: C — LOW.

  "Switch to offensive," she said.

  I switched. The blue became red. Pure, clean, instant.

  "Sensor."

  White.

  "Healing."

  Green.

  Four frequencies. Four pure colors. Four transitions that took less than a second each. I was standing on a grid panel that had cycled through the full primary spectrum faster than Breck herself had demonstrated.

  "Stop," she said. Her voice was flat. The flatness was controlled: the vocal register of a person who was deliberately not reacting. "What's your name?"

  "Renn Vasik."

  "Classification?"

  "Hollow, late manifestation."

  "Late manifestation." She repeated the words with the same inflection the registrar had used, and Varn, and Drell. The inflection that said: I'm accepting this explanation because the alternative is impossible, but I'm filing a note. "Late-manifestation Cores don't produce four-band frequency range, Vasik. They produce one, sometimes two. The channel uniformity that comes with late development limits Resonance specialization, not expands it."

  "My channels are atypical."

  "Atypical is becoming your theme." She produced her tablet. Made a note. I couldn't see what she wrote but the Flux in her fingertips was readable as she tapped the screen and the frequency of her irritation was readable through my sensor channels: she was annoyed. Not at me specifically. At a data point that didn't fit her models. Breck was a woman who built her career on understanding Resonance patterns and my pattern was a disruption to her professional framework.

  "You're flagged for advanced Resonance evaluation," she said. "End of semester. Stay in your primary band for class exercises. Don't demonstrate four-band range again unless I ask you to."

  "Understood."

  She moved on. I stood on my grid panel and breathed. The panel was still lit green from the last frequency I'd produced. Around me, students were struggling with their single-band attunement. Nobody had noticed my four-band demonstration except Breck.

  And Suki, who was two rows ahead, her panel lit in a clean red. She didn't turn around. She didn't need to. Her Flux signature was orienting toward me with the same directed attention she'd shown since the cafeteria, and the signature carried a frequency that my sensor channels read as concern layered with something else. Calculation. She was already thinking about what Breck's flag meant for the semester review. Already modifying the model.

  I dialed it back. For the rest of the session, I produced only blue. Defensive band, C-grade intensity, the most boring output I could manage. The grid panel under my feet was a flat, unremarkable blue and the flatness was a lie and the lie was exhausting in a way that the Flux output wasn't because maintaining a lie required more energy than maintaining a technique.

  * * *

  The paired Resonance session happened a week later.

  Breck structured it as a synchronization exercise. Paired students stood facing each other, palms pressed together, and attempted to harmonize their Flux frequencies through the contact point. The goal was to produce a matched output — both partners emitting the same frequency at the same intensity, the combined energy registering on the grid as a single, amplified signal. Resonance sync. The foundation of paired cultivation, the mechanic that made training partnerships effective.

  Suki and I stood facing each other in Hall 2. The grid panels under our feet were waiting. Her palms met mine and the contact was familiar now, the same paired touch we'd been practicing in Hall 7 for weeks. But this was different. The previous contact exercises had been Channeling-based: raw power flowing between us, force and density. Resonance synchronization was about frequency. About attunement. About two people's Flux matching each other's oscillation so precisely that the boundary between your energy and theirs dissolved.

  "Blue," Breck called. "Defensive frequency. Both partners. Sync on three. One. Two. Three."

  Suki produced blue. Clean, precise, her B-grade output humming at the standard defensive frequency. I produced blue. My synthetic channels carrying the exact same oscillation, matched through the contact point to Suki's output.

  The grid panels under both of us flared bright blue. The combined output registered as a single signal. The amplification was immediate: two matched frequencies combining to produce an output greater than the sum of the inputs. Standard Resonance sync theory predicted a 40-60% amplification from paired harmonization. Our amplification was higher. I could feel it through my channels: the combined Flux running at a density that was 80% above either of our individual outputs.

  The higher amplification was because our sync was better than standard. Weeks of paired training in Hall 7 had tuned our Flux signatures to each other. My channels had adapted to Suki's frequency profile. Her channels had adapted to mine. The harmonization wasn't the labored matching of two strangers trying to sync — it was the effortless resonance of two instruments that had been calibrated together.

  "Good," Breck said, walking the rows. "Pressler, Vasik. Strong sync." She moved on. The assessment was routine. Good sync, high amplification, nothing that flagged for a B-plus-C pairing.

  But the sync didn't stop when the exercise ended.

  The exercise was thirty seconds. Breck called time. The other pairs released contact, their grid panels dimming. Suki and I released contact. My grid panel dimmed. Hers dimmed.

  The Flux between us didn't dim.

  I could feel her. Not through the contact point, which was gone. Through the ambient field. Through the channels in my hands where her Flux had been running moments ago. The frequency she'd been producing was still resonating in my pathways, a residual vibration that should have faded in seconds and didn't. Her blue was inside my channels and it wasn't dissipating. It was circulating. The Inversion Compression loop was carrying her frequency alongside my own, the two oscillations running in parallel through my unbiased pathways, and the combination was producing a third frequency that neither of us was generating consciously: a harmonic. The overtone of two matched frequencies sustaining past their intended duration.

  Suki felt it too. Her eyes widened. She looked at her hands, then at me. Her lips parted and the expression on her face was not analytical. It was startled. She was feeling something she hadn't expected and the something was running through her channels with a warmth that had nothing to do with Flux theory.

  "I can still feel you," she murmured. Low enough that only I heard it.

  "I know. The sync isn't decaying."

  "It should decay. The contact is broken. Resonance sync requires sustained physical contact to maintain." She looked at her hands again. Opened and closed her fingers. "Your frequency is still in my channels. How is your frequency still in my channels?"

  The answer was that my Inversion Compression loop had absorbed her frequency during the contact and was now circulating it alongside my own Flux, which meant the residual output I was emitting into the ambient field carried her harmonic. She was picking up her own frequency reflected back at her through my output. A feedback loop sustained by proximity rather than contact. The sync had become self-maintaining.

  "I think I'm broadcasting your frequency back to you," I said. "The Compression loop absorbed it. It's cycling through my channels. You're receiving your own output through my ambient field."

  "That's—" She stopped. Swallowed. "That's not how Resonance works."

  "None of what I do is how Resonance works."

  The residual sync held for forty minutes. Through the remainder of the class. Through the walk back to the dormitory. Through dinner in the cafeteria where Suki sat across from me and the harmonic hummed between us and the frequency was warm, sustained, and intimate in a way that physical contact hadn't achieved. Because physical contact required choosing to touch. This was beyond choosing. This was two people's Flux existing in the same frequency space, a shared resonance that didn't need hands or skin or proximity closer than three feet. It just needed both of us to be present.

  At dinner, the harmonic produced a side effect.

  Suki was talking about the sync, analyzing the mechanics, her chopsticks moving as she spoke. The analytical mode was engaged but the analysis kept stuttering because the harmonic was running underneath her words and the harmonic was doing something to her concentration. I could see it: the slight dilation of her pupils when the feedback loop pulsed, the catch in her breathing when the frequency resonated through a particularly responsive channel pathway, the flush on her cheekbones that had been present since the exercise and hadn't faded.

  "The amplification should decay with distance," she said. "The inverse square law applies to Flux broadcast. At three feet of separation, the received signal should be less than ten percent of the original. I'm receiving at maybe sixty percent. That doesn't—" She paused. The harmonic pulsed. Her eyes half-closed. "That doesn't make sense."

  "It's not decaying because the loop is refreshing the signal. Every circulation cycle through my channels amplifies your frequency and broadcasts it back. You receive it, your channels resonate in response, and your resonance feeds back into my ambient field, which I absorb and loop again. Self-sustaining."

  "Self-sustaining," she repeated. The word came out slower than her usual speech. The analytical engine was running but it was running hot, the harmonic interfering with the clock speed, and the interference was visible in her face: the softness at the edges of her focus, the way her gaze kept dropping from my eyes to my mouth and back. "How do we stop it?"

  "Do you want to stop it?"

  The question was not analytical. It was the first question I'd asked Suki that had no technical component and no cultivation application and no purpose other than to know what she wanted.

  She looked at me across the cafeteria table. The rice was cooling on her tray. The harmonic hummed between us. The flush on her cheekbones was deep and warm and her dark eyes were bright and her mouth was slightly open and the air between us was charged with a shared frequency that we'd built together and that was now sustaining itself without either of us choosing it.

  "No," she said. "I don't want to stop it."

  The harmonic lasted until midnight. It faded as I fell asleep, the Compression loop gradually absorbing her frequency into my own baseline, the distinction between her oscillation and mine blurring until the combined frequency became my new resting state. Her Flux, integrated into my circulation. Her frequency, woven into my baseline.

  I slept with the harmonic fading and the jasmine scent on my hands from where our palms had pressed together and the residual warmth of a woman's Flux running through channels that had been empty for eighteen years and were, for the second time in my life, being filled by something that wasn't mine and was better for the presence.

  * * *

  Chapter 16: Allies

  Petra called me to the medical bay on a Wednesday that had nothing to do with injuries.

  The message arrived at noon: Come by after your last class. Not medical. Administrative. Bring your Academy ID.

  I arrived at 4 PM. The medical bay was in its late-afternoon lull: the morning sparring injuries healed, the afternoon wave not yet arrived. Two beds occupied by students waiting for follow-ups. Petra was at her station, clinical uniform, tablet in hand, the auburn hair pinned back today in a way that showed more of her neck and the freckles that continued past her jawline down the column of her throat. She looked up when I entered and the green eyes did the thing they did: professional assessment first, then the second layer, the one that lingered.

  "Sit," she said. She gestured to the consultation alcove: a curtained space at the back of the bay that was used for private medical discussions. The curtain closed behind us.

  She set the tablet between us. On the screen: my Academy medical file. The official one, not the private channel map on her personal tablet. The file was sparse: intake scan (C, low, anomalous channel configuration), two healing visits (cracked ribs, Channeling burn), standard immunization records from Doss's fabricated history.

  "I've been thinking about the semester review," she said. "The deep Core scan that the review board uses is more thorough than the intake scanner. It runs a full-spectrum Resonance analysis: not just grade and reserves, but channel architecture, frequency range, and Core composition. If your Core is scanned at that resolution, the synthetic material will be identifiable."

  "How long until the review?"

  "Eight weeks." She tapped the file. "I've added a flag to your medical record. Officially, you're now classified as a complex late-manifestation case under ongoing specialist evaluation. The flag triggers a protocol: any Core scan or Resonance analysis conducted on you requires the supervising medic — which is me — to be present and to review the results before they're filed."

  "You're inserting yourself between me and the scan."

  "I'm ensuring that the scan is conducted properly for a patient with a documented atypical condition." The phrasing was precise. Clinical. The language of someone who'd built a bureaucratic structure and was presenting it with professional confidence. "The flag is legitimate. Late-manifestation Hollows with anomalous channel configurations do require specialist oversight during deep scans. The protocol exists. I'm just applying it to you."

  "And if the scan shows something a specialist can't explain?"

  "Then the specialist (me) reviews the data before it's filed and determines whether the anomaly requires further investigation or whether it's consistent with the documented atypical condition." She looked at me. The green eyes were steady and the steadiness was deliberate, the composure of a woman who'd decided to do something risky and was presenting the risk as routine. "The data passes through me before it reaches anyone else. That's the protection."

  I looked at her. At the tablet between us with my file on it. At the flag she'd created — a piece of bureaucratic architecture that gave her authority over every medical assessment conducted on my body for the remainder of my enrollment. She'd built a wall between me and discovery and she'd built it using the Academy's own protocols.

  "You could lose your clinical license," I said.

  "I could lose my clinical license if I falsify records. I'm not falsifying anything. I'm applying a legitimate medical protocol to a patient whose condition warrants it." A pause. The composure shifted by one degree. "The condition does warrant it, Renn. Your Core is synthetic. Your channels are growing new pathways every week. Your Flux density is increasing at a rate that no biological cultivator matches. You need specialist oversight. I'm providing it. The fact that the oversight also protects you from detection is a secondary benefit."

  "Is it secondary?"

  The third smile. The one that involved her eyes more than her mouth, the green brightening. "It's concurrent."

  She walked me through the rest. The Academy's reporting structure: what triggered a Guild notification (criminal activity, public safety concerns, Core instability), what stayed internal (academic performance, medical records, disciplinary notes), where the lines blurred (Breck's advanced Resonance evaluation, Drell's combat assessment flag). She'd mapped the reporting pathways with the same thoroughness she'd applied to my channel architecture. Every route that information about me could travel from the Academy to the outside world, and at each junction, the controls that could slow or stop the flow.

  "Breck's evaluation will produce data that shows anomalous frequency range," Petra said. "Under my protocol, that data comes to me first. I review it, contextualize it within the late-manifestation documentation, and file it as consistent with your condition. Breck sees the summary. The Guild sees nothing."

  "And Drell's combat flag?"

  "Combat assessment doesn't route through medical. It goes to the academic review board. I can't intercept that directly." She frowned. The frown was the one she used when a healing wasn't going the way she wanted: focused irritation directed at a system that wasn't cooperating. "Suki's partnership helps there. The paired assessment scoring subsumes individual anomalies into the partnership profile. If the review board looks at your combat data, they see a B-grade partnership, not a C-grade anomaly."

  She knew about Suki's design. She'd independently identified the same protection mechanism that Suki had built from the ranking algorithm's side. Two women, working different angles of the same problem, arriving at complementary solutions without coordinating.