The tunnel was colder than Nero expected.
Not the sharp, biting kind that clawed at skin but a deep, persistent cold that seeped inward and stayed, settling into muscle and bone like an old memory that refused to loosen its grip. Every breath felt heavier than the last and fogged faintly in the dim blue light lining the passage.
Their footsteps echoed softly and were muted by the narrow walls pressing in from both sides. Nero's shoulder brushed metal every few steps. Helia walked ahead of him with her posture rigid and weapon held low but ready, eyes constantly shifting through the shadows as if she expected the darkness itself to move.
For once, Nero wasn't watching the walls.
He was watching her.
She had changed.
Not drastically, not in a way anyone unfamiliar with her would notice, but he'd been beside her long enough now to recognize the difference. Her movements were sharper and more restrained. The usual precision remained, but it was layered with tension as if she were holding herself back from reacting too quickly or too strongly.
The message echoed again in his head.
Bond instability detected.
"Helia?" he whispered.
She didn't turn. "Not here."
The words were clipped and controlled. A boundary.
Nero nodded while lowering his voice instinctively. The Archive listened. It always did. Every sound, every shift in tone, every pause between words felt like a risk now.
They moved deeper until the tunnel widened into a small, circular service chamber. The space was bare with no active terminals and no moving machinery, just a single flickering blue panel embedded in the ceiling and struggling to stay alive.
Helia swept the room with practiced efficiency. When nothing lunged at them from the dark, she motioned Nero inside.
The door sealed behind them with a soft hiss.
Silence followed, thick and oppressive.
Helia ran her fingers along a dormant console with eyes narrowing. "Maintenance section K-12," she murmured. "Mostly dead systems. Surveillance should be minimal."
Nero nodded, though his thoughts were elsewhere.
"You don't trust the Archive," he said quietly.
Helia looked at him as if he'd asked whether gravity was optional. "You're asking that now?"
"Yes." He shrugged faintly. "It watches us. Tracks everything. Every reaction. Every feeling. Why stay here at all?"
She leaned against the console while exhaling slowly. Something weary surfaced in her eyes, something old.
"For some of us," she said, "this place is all we've ever known. You can't escape a world if you can't imagine what exists outside it."
Nero absorbed that.
"It doesn't have to stay that way," he said.
For a brief second, her eyes lifted, surprised and almost hopeful.
Then the wall went back up.
"Don't say things like that," she muttered. "It makes this harder."
"Harder to what?"
She stopped herself before finishing. Her jaw tightened. "Harder to remember what this place does to people like you."
Like me.
Before he could ask what she meant, a low buzzing crackled from the ceiling. Nero tensed instantly.
Helia spun with her weapon raised.
The blue panel flickered violently with light surging and dimming as if something were forcing itself through unstable circuitry.
Nero felt it, a faint pulse beneath his skin.
"Veyra?" he whispered.
Helia shook her head. "No. External signal."
The light flared.
A figure formed within it, tall and blurred and outlined in fractured teal.
Not human. Not machine.
"...Prototype... Twelve..."
Nero's breath caught.
Helia's fingers tightened around her weapon, but she didn't fire.
The figure leaned closer with its shape glitching with every movement.
"...You must listen..."
"Who are you?" Nero asked.
A pause.
"...An echo," the voice rasped. "...What remains of a prototype... undone."
Helia stiffened. "Another one?"
"...What remains," it repeated.
Nero stepped forward despite Helia's grip on his sleeve. "Why are you here?"
"...Because the Archive has marked you... as it marked us..."
The temperature seemed to drop further.
"...Instability is the first step toward erasure."
Nero felt sick.
"...Do not let them decide who you are... They will rewrite you..."
"Rewrite me into what?" Nero asked.
The echo dimmed.
"...Into nothing you would recognize..."
Then it shattered with teal fragments dispersing like dying embers.
Silence reclaimed the room.
Helia lowered her weapon slowly with her hand trembling despite her control.
"Why warn me?" Nero whispered.
"Because you're close," Helia said quietly. "Closer than the Archive wants."
He swallowed. "And the bond?"
Her voice was barely audible. "That wasn't a warning. It was a countdown."
A groan rippled through the ceiling above them.
They weren't safe.
But they moved anyway.
Together.
And the Archive noticed.