The implant wound on Renne's spine throbbed for three days.
She spent those days in her white-walled room, lying on her stomach, staring at the rings of Saturn. Food came through a slot in the door—nutrient paste in silver packets, bland and warm. She ate because her body needed fuel. Not because she wanted to.
On the fourth day, her bracelet beeped. Not the oxygen alarm. A schedule.
*0600: Physical Assessment. Hangar Bay 3.*
Renne sat up. Her back screamed, but she pushed through it. She pulled on the gray uniform that had been left outside her door. It was stiff, unfamiliar. The fabric felt expensive compared to the recycled rags she'd worn on Mars.
She walked through corridors that all looked the same: white walls, soft lights, the distant hum of the station's life support. Her boots squeaked on the polished floor. Cadets passed her, most in black uniforms, some in gray. They glanced at her, then looked away. One muttered "Indent" under his breath.
She found Hangar Bay 3. It was a large chamber with a high ceiling, the floor marked with yellow lines for running drills. About twenty cadets were already there, stretching, talking in small groups.
The red-haired girl from orientation was standing near the entrance. When she saw Renne, her face lit up.
"Hey! You're the Indent girl. The one with the dead mecha."
Renne didn't respond. She walked past her toward an empty corner.
The red-haired girl followed. "I'm Eris." She extended a hand. Her uniform was gray like Renne's, but cleaner. "You're Renne, right? From Mars?"
Renne looked at the hand, then at Eris's face. The girl was younger than her, maybe sixteen, with a round face and eyes that seemed genuinely curious. No mockery. No calculation.
Renne didn't take the hand. "What do you want?"
Eris dropped her hand, but her smile didn't fade. "Nothing. Just thought you might want someone to talk to. You're always alone." She tilted her head. "Eating alone sucks, feels like being punished."
Renne turned away. "I'm used to it."
"That's sad."
Renne's jaw tightened. She was about to respond when a voice cut through the hangar.
"Line up."
Instructor Vex walked onto the floor, his cybernetic eye glowing. The cadets scrambled into two lines. Renne moved to the back. Eris stood beside her.
Vex's gaze swept over them. "Today, we find out which of you are worth the implants in your spines. The physical assessment will test your baseline. Speed. Strength. Pain tolerance." His smile was thin. "Most of you will pass. Some of you won't."
He pointed to a track that circled the hangar. "Five laps. The last three finishers are disqualified from mecha assignment."
Cadets began running. Renne started at a steady pace, but her body was not ready. The implant site burned with each stride. Her lungs, still adjusting to the station's rich air, burned in a different way.
She fell to the back of the pack.
By the third lap, her vision was blurring. Cadets passed her, some sneering, some ignoring her. She pushed harder. Her legs screamed. Her back felt like someone was driving a spike between her vertebrae.
On the fourth lap, she stumbled. Her knee hit the metal floor hard. Pain shot up her thigh.
"Renne!" Eris's voice. The red-haired girl slowed down, looked back. "Come on, you're almost there."
Renne pushed herself up. Her knee was bleeding through the fabric of her uniform. She limped forward. Eris matched her pace, staying beside her.
"Don't help me," Renne rasped.
"I'm not helping. I'm just running slow." Eris's breathing was steady, controlled. She wasn't even winded. "But if you don't finish, you're out. And I think you want to stay."
Renne bit down on her lip. She forced her legs to move faster. Pain became a white noise in her skull. She crossed the finish line second to last. The cadet behind her collapsed, gasping, and was carried away by medical drones.
Vex stood at the finish, his tablet displaying times. His red eye fixed on Renne.
"Barely adequate," he said. "But adequate."
Renne leaned against the wall, her chest heaving. Blood dripped from her knee onto the clean floor.
The next test was combat drills. Cadets paired up, practicing strikes and blocks. Renne was paired with a tall, broad-shouldered cadet in black—a noble, judging by his confident stance and the silver ring on his finger.
He smiled at her. "Try not to break, Indent."
He swung first. Renne blocked, but his force knocked her arm aside. His next strike hit her ribs. She staggered. Another hit to her shoulder, and she was on the ground.
"Pathetic," he said, standing over her.
Renne pushed herself up. Her ribs screamed. She raised her fists.
He hit her again. And again. Each time she fell, she got back up. By the end of the session, her face was bruised, her lip split, and her uniform was torn at the shoulder.
The noble walked away, shaking his head. "Not worth the effort."
Eris appeared beside her, holding a cloth. "Here. For your lip."
Renne took the cloth. She pressed it to her mouth, tasting blood. "Why are you still here?"
"Because I want to be." Eris sat down beside her on the floor. "You're actually nice, you know. You just act tough like a Mars rock. But rocks can crack too, right?" She smiled. "I'll wait for you to crack, so your niceness comes out."
Renne stared at her. She didn't know what to say. No one on Mars had ever said anything like that to her. On Mars, kindness was a luxury no one could afford.
"You're weird," Renne said finally.
Eris laughed. "Yeah. I know."
---
The next morning, Renne woke to a message on her bracelet.
*Report to Instructor Vex. Training Bay 7. 0700.*
She arrived early. Training Bay 7 was a small room with padded walls and a single chair in the center. Vex was already there, leaning against the wall, his arms crossed.
"Close the door."
Renne did. She stood in the center of the room, waiting.
Vex circled her slowly, his footsteps soft on the padded floor. "Your physical scores were the lowest of any inductee in three years. Your combat skills are non-existent. Your mecha is a rust bucket no one else wanted." He stopped in front of her. "And yet, you survived the implant. You finished the run. You got up every time that noble knocked you down."
He tilted his head, the red light of his cybernetic eye casting a red line across her face.
"Why?"
Renne met his gaze. "Because I don't have a choice."
"Wrong." Vex's voice sharpened. "Everyone has a choice. You chose to get up. You chose to keep running. Why?"
She thought about it. About Mars. About the child who suffocated. About her father's chip. About the warmth she felt when she touched Argent.
"Because I'm still alive," she said. "And while I'm alive, I'm not done."
Vex's lips curled into something that might have been approval. Or amusement. It was hard to tell.
"Good." He walked to the wall and pressed a button. A holographic screen appeared, displaying a schematic of a human body with glowing lines along the nervous system.
"The Nanomachine Core in your spine is more than an implant. It's a bridge. It connects your nervous system to your mecha. Your thoughts, your movements, your instincts—they become the mecha's movements." He pointed to the schematic. "But the bridge goes both ways. What the mecha feels, you feel. Damage. Heat. Pain."
He turned to face her. "That's where most cadets break. They can't handle the feedback. Their minds shut down. Their bodies reject the core." He paused. "You're going to learn to control it. Or you're going to die trying."
He pulled a small device from his pocket—a metal cylinder with a single button on top.
"This is a pain inducer. It stimulates the nanomachines in your spine without a mecha connection. It will feel like your body is tearing itself apart." He held it out. "Your first lesson. Endure."
Renne looked at the device. Then at Vex.
"What's the catch?"
"No catch. Endure for sixty seconds, and I'll teach you something worth knowing. Fail, and you go back to the basic training track. You'll be assigned a mecha in six months, if any are left." He placed the device in her hand. "Your choice."
Renne closed her fingers around the cylinder. She looked at the button.
'Sixty seconds. I survived Mars. I survived the implant. I can survive this.'
She pressed the button.
[Pain]
It hit her like a physical force. Her spine arched. Her muscles seized. It wasn't like the implant—that had been a sharp, focused agony. This was everywhere. Her nerves screamed. Her vision went white. She felt her own heartbeat as a violent thud against her ribs, each pulse sending new waves of fire through her limbs.
She fell to her knees. Her fingers gripped the cylinder so hard her knuckles went white. She couldn't breathe. She couldn't think. There was only pain, endless and absolute.
'Ten seconds,' she told herself. 'It's only been ten seconds.'
Her body convulsed. She tasted blood from her split lip, or maybe from biting her tongue. Her ears rang. She felt herself starting to slip, to fall into the dark where the pain couldn't reach.
'No.'
She thought of the child on Mars, the red light on her bracelet going dark. She thought of her father, standing in front of the Imperial soldiers, his hands raised, his face calm. She thought of the chip, warm against her chest, pulsing like a heartbeat.
'I'm not done.'
She forced her eyes open. Vex was crouched in front of her, watching, his expression unreadable. The red light from his eye painted her vision in crimson.
"Forty seconds," he said.
Renne's arm trembled. She kept her finger on the button. Sweat dripped into her eyes. Her muscles locked, unlocked, locked again.
'Forty seconds. Halfway.'
She focused on Vex's face. On the scars. On the cold metal of his cybernetic eye. She used him as an anchor, a fixed point in the storm of pain.
"Fifty seconds."
Her hand was shaking. Her whole body was shaking. She could feel her heartbeat slowing, her blood pressure dropping. She was going to pass out. She was going to—
"Sixty seconds."
Vex's hand closed over hers and pressed the button again, deactivating the device. The pain vanished.
Renne collapsed onto the padded floor. Her chest heaved. Her limbs felt like they were made of lead. She lay there, staring at the ceiling, her breath coming in ragged gasps.
Vex stood over her. For a long moment, he didn't speak.
Then he said, "Not bad."
He walked to the wall and retrieved a small case. He opened it and took out a silver injector.
"This is a neural stabilizer. It'll help your body adapt to the nanomachines." He pressed it against her neck. A soft hiss, then cool relief spreading through her spine. "You'll need it. Because tomorrow, we start real training."
He left the room. The door slid shut behind him.
Renne lay on the floor for a long time, her body slowly unclenching, her breathing evening out. She looked at her hand, still wrapped around the pain inducer. Her fingers were stiff, the skin raw where she'd gripped it.
'I endured.'
She didn't feel proud. She felt hollow, scraped clean. But underneath the hollow, something was hardening. Something that had been soft and scared on Mars. Something that was learning to become sharp.
She sat up slowly. Her back ached, but it was a dull ache now, manageable. She stood, her legs unsteady, and walked to the door.
The corridor outside was empty. She started walking back to her room, but her feet took a different path. Through the white corridors, past the training bays, toward the hangar.
She didn't think about it. She just walked.
The hangar was dark, the mechas standing silent in their alcoves. Renne walked past the gleaming new models, past the polished armor and fresh paint, toward the far end.
Argent was where she'd left it. Rusted, dented, slumped. In the dim light, it looked even more broken than before.
Renne walked up to it. She placed her palm on its leg armor.
The metal warmed immediately. Faster than last time. And beneath the warmth, she felt something else. A vibration, low and steady, like a purr.
She closed her eyes. The pain in her back faded. The ache in her ribs eased. For a moment, she felt… held. Like the mecha was wrapping around her, not physically, but in some way she didn't have words for.
'What are you?' she thought.
The vibration deepened. A soft hum, almost like a voice, echoed in her bones. She couldn't understand it, but the meaning was clear.
*'Here.'*
Renne opened her eyes. She looked at Argent's scratched canopy, at the dark optical lens.
"I'm not going to break," she whispered. "I'm going to survive. And you're going to help me."
The lens flickered. Pale blue light, just for a second. Then it went dark.
But the warmth stayed on her palm, long after she pulled her hand away.
---
In the observation deck above the hangar, Vex stood in the shadows. His arms were crossed, his red eye fixed on the scene below.
He watched the Indent girl walk away from the rusted mecha. He watched the flicker of blue light from Argent's lens. He watched the way the girl's posture changed as she left—straighter, steadier, less like a survivor and more like something that was learning to fight.
He pulled up a file on his tablet. Renne. Mars. Indent. Father executed for possession of illegal data. Mother deceased. No known relatives.
He scrolled to a different file. A data log from the day of the invasion. A chip emitting a signal that disrupted a knight's mecha sensors. A genetic match flagged by the Imperium's central system.
Vex closed the file.
"Interesting," he murmured.
He turned and walked into the darkness, his footsteps echoing in the empty observation deck.
Below, Argent stood silent in its alcove. But deep in its core, the dormant consciousness that had been sleeping for six years was now fully awake. And it was waiting.