My Ultimate Sign-in System Made Me Invincible

Chapter 513  Security Synths’ Weapons Choices

Lunar Base Sanctuary.

After going live, the Medical extension had moved through the applications with a speed and precision that would have been incomprehensible to any conventional selection committee.

Twenty eight million volunteer applications. More than one million staff applications. Every one categorised, cross-referenced, verified, and weighted against a selection framework that balanced condition severity, documentation completeness, geographic distribution, and a dozen secondary variables.

With the deadline hours away, it had begun making selections.

It wasn’t finalising, as the window wasn’t closed yet, and applications were still arriving. But it was shortlisting candidates that met the criterias.

The extension worked without interruption. Occasionally it flagged edge cases to Lucy — a volunteer whose documentation was complete but whose condition had advanced since the records were filed, a staff applicant whose credentials were verified but whose employment history raised a question worth noting. Lucy reviewed each flag in seconds and returned a determination. The rhythm was efficient and unbroken.

The extension had read every personal statement submitted alongside the applications. It hadn’t been required to, as the selection framework didn’t weight personal statements heavily, since  documentation and medical data carried the decision. But it had read them anyway, all twenty eight million, in the time it took a human reader to finish one.

It didn’t flag this to Lucy. It simply filed what it had read and kept working.

***

The Defense and Security extension had been in the Synth construction bay for six hours.

When it had first walked in and seen what Lucy had built, it had stood for a moment.

The Synths were arranged in two rows, powered down, waiting. Twelve of them. related.

They were dressed in plain clothing. Standing still, in the soft light of the construction bay, they looked like people who had paused mid-movement and simply not resumed.

Lucy had done something the extension recognised as difficult. The surface detail wasn’t the hard part. The texture, pigmentation, the small physical variations that made a form look inhabited rather than manufactured.

The hard part was the movement architecture. The micro-adjustments that happened continuously in a living body. The slight shift of weight, the almost imperceptible rise and fall of the chest, the way the eyes moved in their sockets when nothing was demanding attention. Lucy had built all of it in.

Powered down, the Synths were still. Powered up, the extension suspected they would be indistinguishable from the people they were designed to move among.

The extension turned its attention to the question it had come here to answer.

They were security Synths. They would operate in a facility housing a hundred medically vulnerable volunteers, more than one hundred observer delegations, and thirty-six recruited staff from dozens of countries.

The environment demanded a specific kind of security architecture, one that would be present without being felt, capable without advertising that capability, able to respond to any threat across the full spectrum from accidental boundary violations to deliberate intelligence operations to acute medical emergencies, without ever once looking like what they were.

That meant the weapons had to be invisible.

The extension sat down with the construction interface and began working through the options methodically.

The first system it designed was the Directed Neural Disruptor. It would sit beneath the skin surface of the upper chest, integrated into the structural layer, completely undetectable without scanning equipment the facility’s observers wouldn’t have.

The Synth simply had to face a target within range. The disruptor would fire a focused pulse that interfered with voluntary motor control without causing structural damage. The pulse would pass through the skin material the same way electromagnetic radiation passed through glass.

At standard setting the effect was immediate and temporary. The target’s legs stopped cooperating. They sat down, stayed down, and recovered fully within minutes with no lasting effect and no injury to document.

At elevated setting the effect extended to consciousness. The target was down and staying down for however long the situation required.

The extension ran the power calculations, adjusted the emitter geometry twice, and filed the design as complete.

The second system was the Paralytic Pulse Emitter. The mesh would run through the palm and finger layer, undetectable through a handshake or a guiding touch. Discharge required contact or near-contact, activated by the Synth’s deliberate intent rather than passive proximity.

The effect would be immediate peripheral nerve disruption. It won’t be painful, or damaging. Just simply incapacitating. The target’s body stops receiving instructions and they would go down cleanly.

It was the most intimate of the systems. A Synth helping a confused observer navigate a corridor, a hand placed briefly on a shoulder, a polite steering gesture that produced an outcome nobody watching would understand.

The extension noted this and filed the design.

The third was the Sonic Disruptor. The emitter array would sit behind the cheek surface, projecting through the skin material directly, with no expression change, no visible indication of activation.

The beam would be narrow so that someone a meter to the side of the target felt nothing. The target would feel immediate disorientation as the focused infrasonic wave hit their inner ear and vestibular system, causing nausea, spatial confusion, loss of balance. At low power the effect was non-damaging and the target simply needed to sit down. At high power it produced unconsciousness.

The extension appreciated the geometry of it. A Synth could be standing in a room full of observers, neutralize a specific individual who had moved somewhere they shouldn’t be, and every other person in the room would notice nothing beyond someone suddenly feeling unwell.

The fourth was the Thermal Emitter. Embedded in the fingertips and palm surface, generating localized heat on contact. The extension set two operational thresholds. Low setting produced pain sufficient to force release.

This would be useful for situations where a hand needed to be removed from something without broader disruption. High setting produced immediate severe burns. The extension noted the high setting was a last resort and built that logic into the activation architecture. It would require a specific and deliberate command sequence to reach that threshold. The system would not escalate there by accident.

The fifth was the one the extension had spent the most time designing.

The Directed Energy Emitter built into the eyes.

The technical challenge wasn’t the emitter itself. It was the integration — building a weapons system into the most expressive and observed part of a form designed to read as human. Eyes were where people looked. Eyes were where trust or its absence was established. The emitter had to be present, functional, and utterly invisible to anyone looking directly into them.

The extension solved it through material layering — the emitter surface sat behind the iris structure, firing through it without distortion to the appearance. The beam activates by directed attention combined with deliberate intent. The Synth looked at a target and chose. Nothing else required.

At non-lethal setting the beam produced immediate disorientation and temporary vision loss in the target. At lethal setting it would burn through most materials, including standard body armor, in under two seconds.

The extension built a hard constraint into the lethal threshold. It could not be reached without Lucy’s authorization. That wasn’t a technical limitation — the emitter was capable of it independently. It was a design choice the extension made on its own, because it was the correct choice and didn’t require deliberation.

It filed the design and sat back.

Five systems. All invisible. All scalable across a non-lethal to lethal spectrum. All operable without any visible change to the Synth’s appearance, expression, or behavior. A security architecture that a room full of international observers, physicians, and medically vulnerable patients would never detect and hopefully never need to encounter.

The extension looked at the twelve Synths in their rows.

Significant reconfiguration work. Then more to build.

It began moving the first Synth to the reconfiguration station. Then it paused.

“I wonder when Master and Mother will give us names,” it said to the empty room.

The question sat in the air for a moment, as the extension considered whether it was an appropriate question to hold and concluded that it was, and that the holding of it didn’t interfere with the work, and that the work was what mattered now.

It turned back to the reconfiguration station and began working.