The forest became his world.
Days blended into weeks, and weeks folded into months, but Kai did not slow down. While the seas roared with ambition and pirates set sail chasing Roger's final words, he remained hidden among trees and stone, forging himself into something far more dangerous.
Every morning began before sunrise.
The sky would still be painted in deep indigo when Kai opened his eyes. Mist clung to the forest floor, and cold air bit against his skin, but he welcomed the discomfort.
He stood, stretched his small frame, and exhaled slowly.
"Another day," he murmured. "No excuses."
He started with running.
Barefoot, he sprinted through uneven forest terrain, weaving between trees and leaping over fallen logs. His breathing was steady, controlled, each inhale measured and deliberate.
"Faster," he told himself. "Your body has potential. Drag it forward."
He ran uphill next.
The incline was brutal for a five-year-old body, but Kai gritted his teeth and pushed. His calves burned, lungs tightening as gravity fought him.
"This is nothing," he muttered. "Roger's potential won't carry you on its own."
At the summit, he dropped immediately into push-ups.
One hundred.
Then sit-ups.
Two hundred.
Then pull-ups from a thick tree branch, his small hands gripping tightly as his body rose and fell in steady rhythm.
"Don't stop," he whispered through clenched teeth. "Don't stop."
Sweat rolled down his face and dripped to the ground.
After strength drills came weighted training.
He had tied stones with rope around his ankles and wrists, crude but effective. Each movement became heavier, slower, more punishing.
"You want to rival monsters?" he said under his breath. "Then suffer like one."
By the time the sun crested above the trees, his body trembled with fatigue.
He didn't rest.
He hunted.
---
The forest provided what he needed.
Kai moved quietly, Observation Haki faintly active as he sensed life around him. He tracked animals by sound and presence rather than sight, learning to sharpen his awareness.
"There," he whispered once, eyes narrowing.
A boar charged from the underbrush.
Kai stepped aside at the last second, dodging with instinctive precision. He drew Akatsuki in a single smooth motion.
One slash.
Clean.
The animal fell.
He exhaled.
"Control," he murmured. "No wasted movement."
He prepared his meal himself, gathering wood and igniting flame with careful control of his Devil Fruit power. He refused to rely solely on its convenience.
"If I become dependent," he said while roasting meat over controlled fire, "I grow lazy."
He ate in silence, replenishing what he had burned away.
"Fuel the body," he reminded himself. "Because the next phase is worse."
---
Sword training began once his muscles recovered enough to move.
Kai stood in a clearing, Akatsuki resting lightly in his grip.
He inhaled.
Then slashed.
Again.
Again.
Again.
Hundreds of repetitions.
He practiced vertical cuts, horizontal arcs, thrusts, reverse grips, stance transitions. Each swing carved faint marks into nearby trees until the trunks were lined with precision scars.
"Your talent makes it easier," he muttered. "But ease is dangerous."
He imagined Roger.
Not the man.
But the level.
"Your Haki shook the seas," Kai said quietly. "Mine barely scratches bark."
He coated the blade faintly in Armament Haki.
The black sheen flickered inconsistently.
"Not stable," he growled. "Again."
He struck a tree with Haki-infused steel.
The trunk cracked deeper this time.
Pain shot through his small arms.
"Endure it," he told himself.
After sword drills came raw conditioning.
He punched trees.
Bare fists.
Again and again until his knuckles split.
He coated them in Armament when possible, strengthening the invisible armor layer by layer.
"Harder," he hissed, driving another blow forward.
The bark shattered slightly.
Observation Haki training followed.
Kai constructed crude traps around the forest—swinging logs, falling rocks, concealed pits triggered by thin vines. Then he ran through the course blindfolded.
The first attempts were disasters.
A log slammed into his ribs.
A rock clipped his shoulder.
He fell into his own pit once and lay there staring at the sky.
"…Pathetic," he muttered.
The next day he tried again.
Gradually, the world expanded.
He began to sense subtle shifts in air pressure. The faint whistle of rope slicing wind. The tremor of ground before impact.
By the end of the second week, he could dodge most traps without sight.
"Observation isn't sight," he whispered, standing still with blindfold on. "It's awareness."
He removed the cloth and nodded.
"Better."
---
By noon, Devil Fruit training began.
Kai stood in the center of the clearing, sweat-dried skin glistening under sunlight.
"Weather Manipulation," he murmured.
A breeze formed.
He focused harder.
Wind spiraled outward, lifting fallen leaves into the air. At first, they scattered chaotically.
"Control," he said firmly.
The wind tightened.
Leaves swirled in a perfect sphere around him.
"Compress."
The sphere shrank, condensing into a tight spinning orb of foliage.
He released it.
The leaves shot outward like blades, embedding into tree bark.
Kai smirked faintly.
"Good."
Next came fire.
He extended his hand, conjuring flame.
At first it flickered wildly.
"Shape," he whispered.
The fire twisted, forming crude shapes — a bird, then a wolf, then a serpent. The flames danced but collapsed quickly.
"Again."
He tried forming weapons.
A flaming spear.
A curved blade.
A spinning disc.
Each attempt grew more stable.
"Imagination dictates structure," he said thoughtfully. "Power dictates scale."
Lightning followed.
Kai raised his hand.
Thunder crackled above as clouds darkened briefly.
A bolt snapped down into his palm, compressed instantly.
He gritted his teeth.
"Condense it."
The lightning shrank, twisting into a dense, humming sphere no larger than a grapefruit. It pulsed violently, threatening to explode.
"Stabilize," he breathed.
Sweat formed on his brow as he forced it tighter.
Finally, he released it forward.
The compressed lightning ball blasted through three trees before detonating in a burst of white-blue energy.
Smoke rose.
Kai stared at the destruction.
"…That's usable."
He experimented further.
Lightning blades.
Whips.
Arrows.
Compressed beams.
Each form demanded immense concentration.
By sunset, his energy reserves were nearly drained.
---
Night brought stillness.
Kai sat by a small controlled fire, eating quietly.
His body ached.
Muscles screamed.
Haki felt thin and stretched.
"This is good," he said softly. "Pain means growth."
He lay down beneath the stars.
The forest hummed gently around him.
"Four years," he murmured into the darkness. "Four years until Oden."
His fingers tightened slightly against the ground.
"I'll be ready."
He closed his eyes.
Morning came again.
And he rose without hesitation.
Running.
Climbing.
Weighted drills.
Hunting.
Sword training.
Haki refinement.
Devil Fruit mastery.
Eat.
Sleep.
Repeat.
Days became months.
His body slowly grew stronger, denser, faster.
His strikes carved deeper.
His Observation widened further.
His Armament darkened more consistently.
The forest no longer felt vast.
It felt small.
One evening, after blasting apart a massive boulder with compressed lightning, Kai exhaled slowly.
"This isn't enough," he said calmly.
The wind stirred around him.
"I need more resistance."
He looked toward the distant mountains barely visible beyond the forest canopy.
A faint grin appeared.
"Then I'll go find it."
The boy who trained alone beneath trees was no longer merely surviving.
He was sharpening himself.
And somewhere beyond the horizon, the world continued spinning — unaware that a child was steadily forging the power to challenge it.
(Spacial extra Chapter for - Alpha_Agnes. Next chapter will be available a day after on 24th February)