At two o'clock in the morning, Artoria stood before the workbench in the basement, holding the newly completed right hip bone component.
The titanium alloy surface shimmered with a cold, silver light, its curves as smooth as biological bone, with the joint socket's spherical precision reaching 0.005 millimeters. But the problem wasn't the processing—the problem was the energy source.
She pre-assembled the hip bone component with the completed spine and ribcage. The embryonic form of a complete skeleton stood on the rack, elegant yet hollow, like a shell awaiting a soul. According to the design, the interior of the pelvis was to house the main energy core, the central processing unit, and the primary transmission mechanisms. But currently, those cavities were empty.
There were three options for the energy solution.
First, high-density lithium battery packs. This was the safest option, with mature products on the market and an energy density sufficient to run the robot for eight hours. However, the charging time was long, they had a limited cycle life, and they took up a lot of space.
Second, fuel cells. These had a higher energy density but required a hydrogen fuel supply, were complex to maintain, and were unsuitable for long-term autonomous operation.
Third, her own design.
She pulled up the energy chapter from the 2B technical data. In the Nier World, androids used a "Black Box"—a miniaturized fusion reaction device. The principle involved the quantum tunneling effect and plasma confinement, a technological level far beyond this era.
But there was a description in the materials that caught her attention: "The core of the Black Box is an energy conversion mechanism based on dimensional resonance, rather than traditional nuclear fusion." Below it was an attached complex mathematical model involving energy coupling between high-dimensional and three-dimensional space.
She couldn't understand all of it. But her intuition told her that this had some connection to the high-dimensional geometry displayed by the deep-sea luminous entity.
At three in the morning, she gave up thinking and went upstairs to rest. Standing by the bedroom window, she looked out at the pitch-black sea. There was no light tonight, but she could sense a kind of gaze—gentle, curious, as if waiting.
At six in the morning, she was woken by her phone vibrating. It was Tony.
"Are you awake? I thought of a plan last night." His voice carried the exhaustion of staying up all night, but he was excited. "Have you seen Stark Industries' clean energy projects? The third-generation arc reactor we developed—although the volume is still large, the principle can be miniaturized. If you need it, I can provide technical support—"
"No need," Artoria interrupted. "I'll solve it myself."
"Are you sure? The difficulty of that thing is no less than creating a miniature Sun."
"I'm sure."
There was two seconds of silence on the other end. "Alright. But if you get stuck, find me anytime. I still have some prototype designs in my lab; they might be inspiring."
"Thank you."
Hanging up the phone, Artoria walked to the basement. The morning light slanted through the high window, illuminating the skeleton next to the workbench. She lightly stroked the titanium alloy surface, feeling the coldness and precision of the metal.
"It will be solved," she said softly, unsure if she was speaking to the skeleton or herself.
The morning's work was to complete the left hip bone and sacrum. Halfway through processing, Coulson called.
"Miss Artoria, the data analysis from last night is out. Our math team has confirmed that the geometric language displayed by the luminous entity contains a complete foundational mathematical system, from Euclidean geometry to non-Euclidean geometry, and from classical mechanics to the embryonic form of relativity. They are trying to establish a complete basis for communication."
"And the conclusion?"
"They believe the luminous entity is benevolent—at least for now. But its knowledge level far exceeds ours, which in itself constitutes a kind of... asymmetrical risk." Coulson paused. "The Director hopes you will continue to maintain observation but do not initiate contact. We are organizing an interdisciplinary team to try and establish a formal communication protocol."
"What do you need me to do?"
"Just observe for now. Also..." Coulson's tone shifted subtly, "Stark Industries submitted a proposal to the Department of Defense this morning regarding a 'Scientific Contact Plan for the Deep-Sea Unknown Intelligent Entity.' Tony Stark is the primary initiator."
"He would do that."
"Yes. But we need to ensure the contact process is controlled. If you communicate with Mr. Stark, if you could appropriately guide him..."
"I don't play the lobbyist," Artoria said directly.
"Understood. We just hope that when necessary, you can remind him to remain cautious." Coulson paused. "Also, is there any progress on your energy solution? If you need special materials or equipment, we have channels."
"Not for now."
After the call ended, Artoria continued her processing. At two in the afternoon, the pelvic structure was entirely finished. She began the final assembly—connecting the spine, ribcage, and pelvis into a complete skeleton.
This was a delicate process. Every connection point had to be adjusted for a perfect fit, bolt torque had to be precisely controlled, and joint clearances had to be measured with a laser interferometer. It took her three hours to complete the assembly of the basic skeleton.
Now, a complete titanium alloy skeleton stood on the workbench. It was about 1.7 meters tall, perfectly proportioned with elegant lines. Although it didn't have motors, sensors, or a shell yet, a faint human form was already visible.
She stepped back two paces, watching quietly. The morning light illuminated the skeleton from the side, casting a long, thin shadow on the wall behind it. In this moment, the lines on the design blueprints had become reality.
Her phone vibrated. It was a photo from Tony—he had filled a whiteboard in his lab with energy design sketches, with a note: "A few miniaturization schemes, for reference only. The third one might be feasible."
Artoria clicked on the third scheme. Tony's thinking was very clever: using a plasma cavity wrapped in multi-layered graphene, constrained by high-frequency electromagnetic fields, to achieve a miniature fusion reaction. Although it was still in the theoretical stage, the direction was correct.
She replied: "The idea is useful, thank you."
Then she turned off her phone and sat back at the workbench. She took a notebook from the drawer, flipped to a new page, and wrote the title:
"Dimensional Resonance Energy Core - Conceptual Design"
Based on the vague descriptions in the 2B technical data, the high-dimensional geometry displayed by the luminous entity, and Tony's plasma confinement idea, she began to sketch her own plan.
It wasn't traditional nuclear fusion, it wasn't chemical energy, and it wasn't batteries.
It was utilizing the energy potential difference between high-dimensional space and three-dimensional space, through a specific resonance structure, to "leak" high-dimensional energy into the 3D World. Like waterfall water flowing from a high place to a low place, it was natural, continuous, and almost infinite.
The sketch gradually took shape: a multi-layered nested geometric body, its surface covered in complex patterns, with a vacuum cavity inside. The patterns weren't decoration; they were "conduits" to guide the energy flow, "anchors" to let high-dimensional energy exist stably in the 3D World.
She worked until evening, completing the preliminary conceptual diagram. The principle was feasible, but the specific implementation would require a vast amount of calculation and experimentation.
At dinner, she heated up another bento Tony had sent yesterday. Sitting on the terrace, she watched the sunset sink into the sea. That skeleton was still in the basement, standing quietly in the darkness, waiting for her to bestow life upon it.
Night fell. She returned to the study and began building a 3D model on the computer. The parameter calculations for the nested geometric body were complex; she needed to handle the projection transformation from non-Euclidean space to three-dimensional space.
At nine o'clock at night, her wristband vibrated.
She walked to the window. Beneath the sea, the luminous entity appeared once more. But this time it didn't display complex patterns; it just floated quietly, its light pulsing softly.
Then, it began to approach.
Slowly and steadily, it rose from the deep sea, reached the shallow waters, and finally stopped thirty meters from the cliff beneath the surface. The light illuminated the surrounding seawater, and schools of fish could be seen circling curiously.
Artoria pushed open the terrace door and walked to the railing. The luminous entity seemed to perceive her presence, and its light intensified slightly.
There was no sense of threat. Artoria's Instinct was as calm as Water.
She raised her hand, hesitated for a moment, and then made a simple gesture—drawing a circle with her right hand and tapping the center with her left.
That was the last pattern the luminous entity had displayed last night: a circle and a dot.
The light beneath the sea suddenly became bright. The luminous entity began to change, unfolding from a halo into a plane, and then projecting an image onto that plane.
It was a response.
The image was the gesture Artoria had just made—the circle and the dot. But a new pattern had been added beside it: a cube with a dot inside.
Then the cube deformed, turning into a more complex polyhedron, with the dot remaining inside.
Finally, the pattern stabilized into a regular icosahedron with the dot at the center.
Artoria held her breath. A regular icosahedron—the Platonic solid closest to a sphere. The dot in the center implied central symmetry in three-dimensional space.
The luminous entity was saying: "I understand three-dimensional space."
She raised her hand again, this time drawing a more complex pattern: an ellipse with a dot at one focus—Kepler's Law.
The luminous entity's response was even faster. It displayed a complete elliptical orbit model and then added a second ellipse, both sharing one focus, forming a binary star system.
It was demonstrating more advanced celestial mechanics.
Artoria felt her heartbeat accelerate. This wasn't one-way teaching; this was a dialogue. The luminous entity was responding to her "words" and expanding upon them.
She went back to the study, grabbed a pen and paper, and quickly drew the geometric structure of the dimensional resonance core she had designed—that complex multi-layered nested polyhedron.
Then she walked back to the terrace and, using the light from her phone's flashlight, slowly traced that structure in the air. It was crude and simplified, but the core features were all there: nesting, self-similarity, high-dimensional projection.
The luminous entity went still.
The light began to change drastically, its brightness increasing to a blinding level, then suddenly contracting into a tiny point. The point moved rapidly beneath the sea, tracing a complex trajectory—it was calculating, analyzing.
Three minutes later, the trajectory stopped. The luminous entity expanded again, projecting a new image.
It was the nested structure Artoria had drawn, but more complete and precise. And beside it was a set of mathematical expressions—a simplified form of the equations describing energy flow in high-dimensional space.
It was saying: "I understand what you want to do. This is feasible."
Artoria stood by the railing, the sea breeze blowing through her long hair. In the darkness, she locked eyes with the intelligence in the deep sea.
"Can you help me?" she asked softly, knowing the other might not understand the language.
The luminous entity flickered once. Then, it projected one last pattern: a simple arrow, pointing from itself to her, and then from her toward the direction of the skeleton.
Then the light slowly dimmed, sank into the deep sea, and disappeared.
Artoria stood in place for a long time. The night wind made her a bit cold, but her heart was warm.
The luminous entity understood. Not just her design, but her purpose. It was saying: "You are creating a companion, I understand."
She went back inside and closed the door. In the basement, the skeleton stood quietly. In the study, the 3D model rotated on the computer screen.
She sat down and wrote in her notebook:
"Dialogue established. It understands three-dimensional space, celestial mechanics, and high-dimensional geometry. It understands my design intent. Next step: refine the energy core design and begin manufacturing a prototype."
"It is not a threat. It is an observer, a scholar, a potential... mentor."
Finishing, she closed the notebook. It was late at night, but she had no desire to sleep.
Walking to the basement, she stood before the skeleton. The morning light slanted from the high window, casting fine patterns of light on the titanium alloy surface.
"Soon," she whispered, her fingers lightly touching the cold metal. "Soon you will have a heart, eyes, and life."
The skeleton remained silent, but in the morning light, its shadow on the wall swayed gently, as if nodding.
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