Three days after the luminous entity departed, S.H.I.E.L.D. withdrew its observation post.
In the early morning, Artoria watched from the terrace as those black SUVs drove away along the coastal highway, leaving behind only empty temporary buildings and dismantled equipment bases. Coulson sent a brief message: "Monitoring mission concluded. The luminous entity is confirmed to have left this dimension; the threat is cleared. Keep in touch."
She replied "Received," then turned back to the basement. On the workbench, the assembly of the left hand's fingers had reached the final stage—the last knuckle of the pinky finger.
Over the past three days, she had completed the entire transmission system. Twenty-four primary joints and seventy-two secondary joints had all been installed and calibrated. Now, the skeleton was no longer a static structure—once powered, it could perform basic human movement sequences: standing, walking, bending, and stretching. Although there was no control program yet, the hardware was ready.
Today, she would begin the nervous system.
She took out special flexible wiring from the material box. This was a special model Tony had procured through Stark Industries' aerospace department—a silver nanowire core wrapped in a biocompatible insulating layer, only 0.1 millimeters in diameter, yet capable of carrying ten amperes of current. One five-hundred-meter roll was just enough.
The nervous system wasn't simple wiring; it was a biomimetic neural network. According to the 2B design, three layers of networks needed to be laid within the skeleton: the movement control layer, the sensor feedback layer, and the high-level decision layer. Each layer had a complex topology with redundant paths between nodes to ensure the system could still function even if partially damaged.
She started from the spine. Opening the wiring grooves on the side of the vertebrae, she threaded the first wire through, following the preset channel toward the pelvis. The wiring had to be just the right tension—too tight and it would pull during movement, too loose and they would tangle. It took her two hours just to complete the backbone circuits for the spinal section.
At noon, Tony visited. He brought a briefcase containing custom high-speed data processing chips.
"Made to your specifications," he said, placing the chip box on the workbench. "Thirty-two-core parallel processing, supports neuro-like pulse encoding, with latency under 0.1 milliseconds. Power consumption is a bit high, but that energy core of yours should be able to handle it."
Artoria opened the box. The chips were only the size of a thumb, their surfaces covered in intricate circuit patterns that shimmered with a dark gold luster under the light. This was the brain of the nervous system, where all sensor data would converge for processing to generate movement commands.
"Tested it?" she asked.
"Basic tests passed. But that pulse encoding you wanted..." Tony pulled up the test data. "My lab people say this encoding scheme is very peculiar. It's not a standard spiking neural network; it's more like... a simplified simulation of some kind of biological nerve. Where did you learn this?"
"Designed it myself," Artoria said, taking the chip and inspecting it under a microscope. The pin alignment was perfect, and the packaging was flawless.
"Fine, I won't ask about the source." Tony leaned against the wall, looking at the nearly finished mechanical body on the workbench. "What's the progress?"
"Transmission system complete, nervous system at 30%. I expect four more days."
"And after that? The shell? Sensor integration?"
"After that is system integration and initial startup," Artoria said as she installed the chip into the reserved slot inside the pelvis, locking it in place. "Then... the testing."
Tony was silent for a moment before suddenly saying, "Before the luminous entity left, it sent me a message too."
Artoria looked up.
"It wasn't a pattern; it was a data packet." Tony took a micro-storage device from his pocket. "Received using a deep-sea sonar array, with a very unique encryption method. It took me three days to crack—inside was a... technical blueprint."
"What technology?"
"A High-Dimensional Energy Stabilization Field Generator." Tony's expression was complex. "The principle is similar to your energy core, but on a larger scale. It can generate a stable energy field a hundred meters in diameter to isolate conventional detection. The blueprint is complete, with mathematical proofs and manufacturing processes included."
"For you?"
"For us," Tony corrected. "The manual starts with: 'To the two observers. When you are ready, use this to hide yourselves.'"
Artoria took the storage device and plugged it into the computer. The blueprint unfolded on the screen—complex geometric structures, precise data, and a complete process flow. This wasn't a gift; it was a tool. The luminous entity was saying: when you attract attention, use this to protect yourselves.
"What is it worried about?" she asked softly.
"It's not worry; it's foresight," Tony said. "Your energy core, combined with this mechanical body—once activated, the energy signature will be very obvious. Though S.H.I.E.L.D. has backed off for now, other factions... HYDRA, AIM, various national intelligence agencies, they'll notice sooner or later. This device can help you hide."
"Are you going to build it?"
"Already building it," Tony smiled. "My lab started prepping materials three days ago. Expect it to be done within a week and installed here. As a... neighborly gift."
Artoria looked at him for a long time, then nodded. "Thank you."
"You're welcome." Tony walked toward the stairs. "By the way, Stark Industries has a charity gala tonight, so I have to make an appearance. I'll come back tomorrow to help you with the wiring—with delicate work like the nervous system, an extra pair of hands helps."
"No need, I can do it myself."
"I know you can. But I'm just idling anyway." Tony waved his hand and left.
In the afternoon, Artoria continued the wiring. The network extending from the pelvis to the limbs was more complex, as every line had to account for stretching, twisting, and friction during movement. She had to frequently transform into her Bronya form, using that precise operational intuition to complete the most delicate parts.
At six in the evening, she completed the neural network for the lower limbs. A simple test: sending simulated pulse signals to the legs resulted in precise responses from the servo motors and smooth data feedback from the force sensors. No latency, no interference.
"Passed," she recorded.
At dinner, she sat on the terrace, looking at the calm sea. After the luminous entity left, this stretch of sea had returned to an ordinary night—no blue light, only moonlight and stars. But that feeling of being watched hadn't completely vanished; it had turned into a fainter, more distant connection, like some far-off promise.
She thought of the pattern the luminous entity had left behind, that triangle and the three rotating lines. Tony's interpretation might be right: past, present, and future. The luminous entity had observed her arrival (past), appeared while she was building (present), and promised to return (future).
This wasn't an end; it was a comma.
Late at night, she continued working. The neural network for the upper limbs was even more refined—controlling the hands required extreme precision, with every joint needing independent control while also operating in coordination. She worked until two in the morning, completing the network for the right hand.
Just as she was testing the neural feedback of the right hand, something strange happened.
She sent a "bend" command to the right index finger, and it bent. But at the same time, the ring finger also twitched slightly—though the movement was tiny, the sensors detected it.
"Crosstalk," she frowned.
Signal interference had occurred between different lines in the neural network. This was a common problem in precision wiring, but her design should have had sufficient isolation. She disconnected the power and re-checked the wiring, finding a flaw—two wires were too close together as they passed through the wrist joint, and the insulation had slightly worn down from repeated bending.
"Needs to be redone."
She carefully disassembled the wrist casing, removed those two wires, replaced them with new ones, and re-wired them. This time, she added an extra layer of isolation to ensure nothing would go wrong.
Retesting, the crosstalk disappeared.
But during this test, she discovered an even more subtle phenomenon.
When she sent a "clench fist" command to the right hand, the five fingers didn't move in perfect synchronization. The index and middle fingers moved first, the ring and pinky fingers followed slightly slower, and the thumb closed last—this sequence wasn't set by the program; it was some kind of "coordination pattern" generated by the neural network itself.
She repeated the test ten times. Each time the sequence was slightly different, but the overall trend was consistent: there was a minute, non-preset coordination relationship in the finger movements.
This wasn't an error; it was a... characteristic.
The neural network was self-organizing. Those complex connections, redundant paths, and the nature of the pulse encoding allowed the network to produce a preliminary "synergistic effect" during operation. Just as in a biological nervous system, simple neuronal connections could give rise to complex behaviors.
She recorded this phenomenon, marking it as "to be researched." This could be a good thing—more natural movement coordination. It could also be a hidden risk—unpredictable behavior.
At four in the morning, she completed the neural network for the left hand. The final test passed; there was no crosstalk, and the coordination phenomenon was still present but stable.
She leaned back in her chair, exhausted. The basement was brightly lit, and on the workbench, the complete mechanical body lay quietly. A silver-white skeleton, precision joints, a complex neural network, and the sleeping energy core and processor in the pelvis.
Only one last step remained: system integration and initial startup.
But tonight was enough. She needed rest.
She went upstairs, washed up briefly, and collapsed onto the bed. Before closing her eyes, she took one last look out the window—the sea under the moonlight was calm and deep, waiting.
In her dream, she saw the pattern left by the luminous entity rotating. The triangle was stable, the three lines rotated, and then... a point appeared in the center of the triangle.
A silver-white point, like her mechanical body.
The pattern was saying: a new life within stability.
In the morning, she woke up in the early light. Walking down to the basement, the mechanical body shimmered with a cold silver luster in the dawn. The neural network was complete, the wires faintly visible inside the skeleton like blood vessels, like nerves.
She opened her laptop and wrote:
"Nervous system complete. Preliminary self-coordination phenomenon discovered during testing, to be observed. The luminous entity left blueprints for a hiding device; Tony is currently manufacturing it. Progress: Nervous system 100%, overall completion 85%."
"Today's goal: Begin shell and sensor integration. Expect to complete all hardware within three days and enter initial preparations."
After writing, she walked to the workbench. She took out the prefabricated carbon fiber shell components from the material box—these had arrived last week, aerospace-grade material, light and tough. The shell was divided into forty-seven parts, which had to be precisely installed to fit the skeleton perfectly.
She picked up the first piece—the front thoracic plate. A thin carbon fiber plate, its inner surface pre-installed with a temperature sensor array and a tactile sensing grid. She needed to mount it to the skeleton and connect the sensor cables.
The work began. The morning light slanted through the high window, casting delicate light patterns on the carbon fiber surface.
Step by step.
The mechanical body was gaining skin, gaining senses, gaining the ability to contact the World.
And deep within, inside the neural network, faint pulses were flowing spontaneously, like the first throbs of life.
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