She arrived before dawn, alone, on foot, walking out of the black ice like she owned it.
Sejin saw her from the camp's eastern watch—a figure in grey, hooded, moving with a rhythm that didn't match the wind. No Source aura. No footprints in the frost. Just a woman, approaching the Fangs as if the Deep Uras beneath her feet were nothing worth noticing.
The guards raised their weapons. She walked past them.
No one stopped her.
Sejin met her at the center of the camp, between the cook fires and the supply tents. The hood fell back.
Her face was old. Not wrinkled—weathered, like stone carved by centuries of wind. Grey hair, cropped short. Eyes the color of rust. A scar ran from her left brow to her jaw, pale and thick, the kind of scar that came from something that should have killed her.
"You're Sejin Yun," she said.
"Yes."
"I'm Akari Zesis. Mira sent for me three weeks ago. I would have been here sooner, but the ice had other plans." Her voice was dry, flat, without warmth. "You're going to train with me."
Sejin's claw pulsed. "Careful," The Other said. "She's not like the others."
"I don't need a new trainer," Sejin said.
Akari's rust-colored eyes didn't blink. "You need someone who can kill you. Sora can't. Mira won't. I can. I will, if you waste my time."
She turned and walked toward the frozen river.
"Follow me, boy. Or don't. I'll be gone by noon."
---
Sejin followed.
The frozen river was empty—the training session with Sora had ended hours ago. The black ice gleamed under the bruise-colored sky. Akari stood at the center, her hands clasped behind her back, her grey robes unmoving despite the wind.
"You've been fighting with a handicap," she said. "Your left arm is a crystal claw. You treat it like a burden. It's not. It's a gift you haven't learned to open."
"I've been told."
"Then why haven't you opened it?"
Sejin's jaw tightened. "Because I don't know how."
Akari turned to face him. Her rust-colored eyes were calm, patient, utterly without pity.
"Then I'll show you. Attack me."
Sejin hesitated.
"Don't," The Other said. "She's baiting you."
"She's testing me."
"Same thing."
Sejin raised his right hand. A shadow blade formed—thin, flickering, but steady. His left arm hung at his side, the crystal claw scraping the ice.
He attacked.
---
The first exchange lasted two seconds.
Sejin lunged. Akari didn't move. His shadow blade passed through the space where her chest had been—except she was no longer there. She was beside him, her hand resting lightly on his shoulder.
"You're slow," she said.
He spun, blade arcing toward her neck. She ducked—no, she leaned, just enough for the blade to miss by a hair. Her foot hooked his ankle. He fell.
The ice met his back. His claw cracked the surface. Purple sparks flew.
Akari stood over him, her expression unchanged.
"Again."
---
The second exchange lasted four seconds.
Sejin rose, this time using his claw to push off the ice. He attacked low, sweeping the blade toward her knees. She stepped over it—not jumped, just stepped, as if his blade were a crack in the sidewalk she didn't want to trip on.
Her palm struck his chest.
Not hard. Not fast. Just... precise. The impact sent him skidding backward across the ice, his boots leaving gouges, his breath leaving his lungs.
He stopped ten feet away, gasping.
Akari hadn't moved from her spot.
"You're relying on the blade," she said. "The blade is an extension of your will. Your will is fractured. Therefore, your blade is useless."
Sejin pushed himself up. His ribs ached. His right hand shook.
"What do you want me to use?"
"Your claw."
"I don't know how."
"Then learn."
She attacked.
---
No warning. No shift in posture. One moment she was standing still. The next, she was in front of him, her hand closing around his crystal claw.
Sejin tried to pull back. He couldn't.
Akari's grip was iron. Her rust-colored eyes were inches from his.
"The claw is not a weapon," she said. "It's a sense. Like sight. Like hearing. You don't swing your eyes at an enemy. You open them. You see."
She squeezed.
The claw pulsed. Purple light flared. Sejin felt something crack inside him—not bone, not Source, but something deeper. A wall. A seal. A door.
And then he saw.
Not with his eyes. With the claw.
He saw Akari's Vein. Not the cracks—the shape of her. The texture of her Source. The way it moved through her body like water through riverbeds, smooth and ancient and impossibly deep.
She had no knots. No scars. No weaknesses.
She was whole.
And she was holding back.
"You see now," she said. "Good."
She released his claw. Sejin stumbled back, gasping, his vision swimming.
"What... what are you?"
Akari stepped back. Her hands returned to her sides.
"I'm someone who has been fighting Uras since before your mother was born. I'm someone who has seen three Vessels host The Other before you. All of them died. All of them broke." She tilted her head. "You're still standing. That's why I came."
---
"She's dangerous," The Other said. His voice was different—not mocking, not amused. Wary.
How dangerous?
"She could kill me. If I took control of your body right now, she would win. Not easily. But she would win."
Sejin's blood went cold.
Akari watched him, her rust-colored eyes unreadable.
"The thing inside you," she said. "It's talking to you now. Telling you I'm a threat. It's right." She stepped closer. "I've fought Void beings before. Not as strong as yours, but close. I know how they think. How they move. How they die."
She stopped in front of him.
"If your other self takes control of your body—even for a moment—I will kill you. Not him. You. Because once he surfaces, you're already gone. There's no coming back."
Sejin's throat tightened. "You'd kill me? Just like that?"
"I'd kill the thing wearing your face. There's a difference."
She turned away. Walked back to the center of the river.
"Again."
---
The third exchange lasted eleven seconds.
Sejin didn't use the shadow blade. He dropped it, let it dissolve into mist, and raised his claw. He didn't swing. He didn't lunge. He just... opened.
The claw pulsed. Purple light bled across the ice.
He saw Akari's Vein again—the smooth rivers of Source, the ancient depth. He saw her muscles tense, her weight shift, her breath slow.
She was going to move left.
He moved left first.
His claw caught her sleeve—not her arm, just the fabric. She twisted, freed herself, and her knee drove into his stomach.
He folded. Hit the ice. Gasped.
Akari looked down at him. For the first time, something like approval flickered in her rust-colored eyes.
"You predicted my movement. That's progress."
Sejin coughed. "I still lost."
"You still learned." She extended a hand. He took it. She pulled him to his feet. "We'll train for three more days. Then I leave. What you learn in that time is up to you."
"Why only three days?"
"Because in four days, the Silvercrest fleet arrives with orders to capture you. And I won't be here to protect you from them."
---
She left him on the ice.
Sejin stood alone, breathing hard, his claw pulsing with purple light. The camp was waking behind him—soldiers emerging from tents, fires being relit, the murmur of morning routines.
"She's not lying," The Other said. "About the fleet. About capturing you."
"I know."
"And about killing you. If I take control, she'll do it. She has the skill. The will. The experience."
Sejin looked at his claw. The purple light was steady now, calm.
"Then we won't let you take control."
"You say that like it's a choice."
"It is. Every day. Every fight. Every moment I don't let you out." Sejin started walking toward the camp. "I've made that choice seven years in a row. I can make it three more days."
"And after three days?"
"After three days, I'll make it again."
---
The camp was different when he returned.
Not physically—the tents were the same, the fires the same, the soldiers the same. But the atmosphere had shifted. People looked at him differently. Not with fear. With something heavier.
Expectation.
Sora met him at the supply tent. She had a fresh bandage on her arm—the one he had touched with his claw.
"Mira wants to see you," she said.
"About the fleet?"
"About Akari. About what happens after she leaves." Sora's voice was low, careful. "Mira's family isn't going to stop. They want you. And Mira can't protect you forever."
Sejin nodded. "I know."
"Then why are you still here?"
He looked at his claw. The purple light pulsed.
"Because I don't have anywhere else to go."
---
Mira's tent was smaller than he remembered.
She was sitting on a crate, a map spread across her knees, her platinum hair falling over her scarred face. She didn't look up when Sejin entered.
"Akari told me about the fleet," he said.
"Good. Then I don't have to repeat it."
"Why is your family so determined to capture me?"
Mira looked up. Her cold blue eyes were tired.
"Because you're not just a Vessel. You're a weapon. And weapons belong to someone."
"I belong to myself."
"That's not how they see it."
Sejin sat down across from her. The tent was cold. The lantern flickered.
"What are you going to do when they arrive?"
Mira was silent for a long moment.
Then: "I don't know."