The laboratory burned behind them, a pyre of twisted metal and corrupted flesh. Seiji walked at the head of the small column, Byakko padding beside him, his muzzle still stained with Kuroishi's blood. The three freed prisoners followed in silence—two men, one woman, their bodies bearing the scars of the scientist's experiments, their golden threads flickering with exhaustion and residual terror.
They had been captives for three weeks. Kuroishi had used them as test subjects, injecting them with various compounds, measuring their responses, cataloguing their pain. They had watched fellow prisoners die on his tables, their bodies discarded like broken tools. They had survived through luck and sheer endurance. Now they were free. But freedom was not the same as safety.
The woman's name was Akane. She was a chunin, brown-haired, with sharp eyes that had seen too much. During the escape, she had moved with surprising strength, helping the others when they faltered. Seiji had noted her resilience. It was useful.
But his Tenseigan perceived something else.
Deep within her chakra network, buried beneath layers of exhaustion and trauma, a fragment pulsed. Small. Dormant. But unmistakably Otsutsuki. Kuroishi had implanted something in her—perhaps inadvertently, perhaps as part of his experiments. The fragment was not active. It simply... waited. A seed of ancient power, planted in fertile soil.
Byakko sensed it too. The tiger's golden eyes lingered on Akane as they walked, his whiskers twitching with unease. Through their bond, Seiji felt his partner's concern.
She carries the taint, Byakko's voice whispered in his mind. A fragment, like those in the chimeras. Dormant, but present.
I know.
What will you do, summoner?
Seiji didn't answer. The coiled thing in his chest was cold and calculating. The fragment was a threat. Dormant meant it could awaken. If it awakened, Akane could become like the Otsutsuki-chimeras—a vessel for ancient power, controlled by hunger she couldn't understand. She could harm others. She could become a weapon aimed at his people.
The arithmetic was clear. Eliminate the threat.
But Akane was innocent. She hadn't asked for the fragment. She was a victim, a Konoha shinobi who had endured torture and survived. Killing her would be execution, not battle. It would be murder.
The coiled thing in his chest didn't understand murder. It understood function. Protection. The elimination of threats. Whether the threat was aware of its nature didn't matter. A dormant bomb was still a bomb.
He walked in silence, the weight of the decision pressing against his ribs.
---
They camped that night in a narrow defile, sheltered from the mountain wind. Seiji set a small, smokeless fire while Byakko stood watch at the defile's entrance, his golden eyes scanning the darkness. The two male prisoners—a chunin named Kenji and a jonin named Tetsuo—collapsed near the flames, their bodies finally surrendering to exhaustion. They were asleep within minutes, their breathing deep and uneven.
Akane sat apart, her back against the stone wall, her sharp eyes fixed on the fire. She hadn't spoken since the escape, but Seiji perceived her chakra—restless, searching, as if she could feel the fragment within her but didn't understand what it was.
"You're watching me," she said, her voice rough. "More than the others."
Seiji met her eyes. "You know why."
"I felt something. When you killed those... things. The chimeras. Something inside me responded." Her hand pressed against her chest. "He put something in me, didn't he? Kuroishi. One of his experiments."
"Yes. A fragment of Otsutsuki power. Dormant, but present."
Akane's face paled. "Otsutsuki. Like the Sage of Six Paths?"
"Like the things that came before the Sage. Ancient beings who shaped this world and then abandoned it. Their power lingers in fragments scattered across the nations. Kuroishi found some. He implanted one in you."
"And now it's inside me. Growing."
"Dormant. Not growing. Waiting." Seiji's voice was flat. "It could remain dormant forever. Or it could awaken tomorrow. There's no way to know."
Akane was silent for a long moment. Then she met his eyes. "You're going to kill me."
"I'm considering it."
"Because I'm a threat."
"Yes. If the fragment awakens, you could become like the chimeras. A vessel for ancient power, driven by hunger you can't control. You could harm others. You could become a weapon."
"I'm a Konoha shinobi. I would never—"
"You wouldn't have a choice. The fragment doesn't care about your loyalty. It only cares about survival. It would consume you from within and use your body to feed."
Akane's sharp eyes glistened. "Then do it. If I'm a threat to my own village, eliminate me. I won't fight."
Seiji stared at her. The coiled thing in his chest calculated. She was willing. That made it easier. Cleaner. He could sever the fragment's connection to her chakra network—but that would almost certainly kill her. The fragment was woven too deeply, its threads intertwined with her life force. Separating them would be like separating blood from water.
He could try to leave it dormant. Monitor her. Contain her if it awakened. But that would require resources, constant vigilance, the risk that she might harm others before she could be stopped. The arithmetic was clear. Elimination was the most efficient path.
Byakko's voice whispered in his mind. She is innocent, summoner. A victim. The Tiger Clan does not punish the prey for the predator's crimes.
She is not prey. She is a potential threat.
She is both. The choice is yours. But remember: you are more than a weapon. You choose.
Seiji looked at Akane. Her sharp eyes, filled with fear but also acceptance. She had endured torture. Survived horrors. And now she was willing to die to protect her village. She was brave. She was innocent.
But bravery and innocence didn't matter to the fragment inside her.
"I can try to sever the fragment," he said. "But it's woven deeply into your chakra network. The process would almost certainly kill you."
"And if you don't? If you let me live?"
"You'll be monitored. Contained. If the fragment awakens, you'll be eliminated before you can harm anyone."
Akane nodded slowly. "That's not a life. That's a cage." She met his eyes. "Do it. Sever it. If I die, I die free. Not as a threat to my own people."
Seiji extended his hand. "This will hurt."
"I've survived worse."
He placed his palm on her chest, over her heart. His Tenseigan blazed silver-crimson, perceiving the fragment within her—a small, dormant seed of ancient power, its threads woven through her chakra network like roots through soil. He found the connections. The places where the fragment had bound itself to her life force.
"Severing Threads of Existence."
He pressed.
Akane screamed.
The fragment resisted. It had been dormant, but it recognized the threat to its existence. It tried to awaken, to defend itself, to consume her chakra to fuel its escape. Seiji's threads tightened, cutting off its access to her network, isolating it from her life force.
But the fragment was too deeply woven. Every thread he severed damaged her chakra network. Every connection he cut caused her golden thread to flicker, to dim, to fray. He was killing her. Slowly. Precisely. He was eliminating the threat, exactly as the arithmetic demanded.
Akane's screams faded to whimpers. Her sharp eyes went glassy. Her hand found his, gripping with desperate strength.
"Thank... you," she whispered. "For... freeing me."
Her golden thread flickered once more. Then it faded into nothing.
The fragment, severed from its vessel, went dormant—a tiny seed of ancient power, harmless without a host. Seiji withdrew his hand. Akane's body slumped against the stone wall, her eyes open and empty.
She was dead. The threat was eliminated.
Byakko padded to his side, his golden eyes sad. "You did what you had to, summoner."
"Yes. I eliminated the threat."
"And you grieve. I can feel it through our bond."
Seiji was silent. The coiled thing in his chest was still. It had done its function. It didn't grieve. But something else—something fragile and uncertain—recognized what he had done. He had killed an innocent woman. A Konoha shinobi. A victim who had endured torture and chosen to die rather than become a threat to her people.
He would remember her face. Her name. Akane. The brown-haired chunin with sharp eyes who had survived Kuroishi's horrors only to die by his hand.
The remembering kept him human. Or so he told himself.
---
They buried Akane at dawn.
Kenji and Tetsuo said nothing. They had seen what she carried, understood why Seiji had done what he did. They didn't blame him. They didn't thank him. They simply helped dig the grave, placed her body in the cold earth, and covered her with stone.
Seiji stood apart, Byakko at his side. The tiger's presence was steady, grounding. Through their bond, Seiji felt his partner's respect—and his sorrow.
"She was brave," Byakko said. "She faced death with honor. The Tiger Clan will remember her."
"She was innocent. I killed her anyway."
"You freed her from a fate worse than death. The fragment would have consumed her eventually. Turned her into something like those chimeras. She would have harmed others, and then been destroyed. You gave her a clean death, with her honor intact." The tiger's golden eyes met his. "That is not murder, summoner. That is mercy."
Seiji considered. Mercy. He didn't feel mercy. He felt the cold satisfaction of a threat eliminated. But Byakko's words stirred something. Akane had thanked him. In her final moment, she had been grateful. She had seen his act as freedom, not execution.
Perhaps there were different kinds of mercy. The kind that spared lives. And the kind that ended suffering.
He had given Akane the second kind.
It would have to be enough.