Through the endless tide of sea monsters summoned by Caster, Tsutsumi charged straight in.
Form Ride: OOO! Gatakiriba Combo!
His body split into hundreds of clones, each striking down the monsters with ruthless precision, drowning Caster's army beneath sheer numbers.
Final Attack Ride: O-O-O-OOO!
A storm of rider kicks rained down, wiping out the horde. Caster tried to flee, but the overwhelming barrage erased him on the spot. Another card fell into Tsutsumi's hand.
Without pausing, he moved on to his next target.
The subway tunnels of Fuyuki shook as Tsutsumi roared down on his bike, chased by a man atop a massive chariot, sword raised, with an army trailing behind.
Tsutsumi twisting the throttle, then braked hard, spinning back toward the tunnel.
Attack Ride: Grenadier Bracer!
A massive gauntlet appeared on his arm. He pulled the pin.The explosion rocked the tunnels, collapsing them and blasting Rider directly.
Dismounting, he approached the rubble. Rider dragged himself out, coughing, eyes narrowing.
"...What the hell are you? There are already seven Servants!"
"Avenger." Tsutsumi's voice was as cold as the falling snow. He leveled his gun.
Attack Ride: Blast!
Gunfire roared, tearing through Rider without mercy.
From underground to the skies.
Tsutsumi swung between buildings, a corrupted fighter jet in pursuit, piloted by a madman clad in black armor. Missiles locked on.
Form Ride: Build! HawkGatling Form!
Brown metal wings unfurled from his back, propelling him upward. He twisted through the barrage, returning fire, but his bullets barely scratched the jet.
The sky thundered with explosions as the aerial duel raged. Tsutsumi suddenly darted higher, baiting his enemy upward, straight into his trap.
Final Attack Ride: B-B-B-Build!
He dive-kicked straight into the jet, smashing through the cockpit and driving his foot into Berserker's chest. Both plummeted like a comet, exploding on impact.
When the smoke cleared, Tsutsumi walked away, holding yet another card.
Now, Lancer awaited, two spears in hand, one crimson, one gold. Metallic slime coiled at his side, shielding him from every strike.
Tsutsumi launched in. His blade met slime again and again, each thrust blocked before it could reach flesh.
Form Ride: Faiz! Axel!
Start Up!
Time blurred. He vanished into motion, his speed overwhelming. But still, the slime anticipated him, shields snapping into place.
Then Tsutsumi shifted his grip. Blade ready.
Attack Ride: Ackerman Awakening!
Titanic strength surged through him. His strike smashed through the slime's barrier, piercing straight into Lancer's back.
Final Attack Ride: F-F-F-Faiz!
One clean slash split Lancer in two.
"...Who the hell are you?" the man gasped with his final breath.
"All the Evil of the Worlds," Tsutsumi replied coldly, taking the card from his corpse.
Only Saber and Archer remained.
Steel rang out as he clashed blades with Saber, the knight wielding twin swords. Tsutsumi's strike stabbed into his shoulder, but Saber didn't flinch.
With a roar, the knight unleashed a cyclone, hurling Tsutsumi backward in a storm of dust and stone.
Through the haze, golden cards shimmered in the air.
Final Attack Ride: De-De-De-Decade!
Tsutsumi's kick slammed into Saber's chest, launching him across the battlefield before detonating in a brilliant explosion.
When the smoke cleared, the Saber card rested in Tsutsumi's hand.
Only Archer was left.
Tsutsumi approached the Einzbern base, only to find his path blocked by the same woman who had tried to kill him not long ago.
"So... you're the last Servant after all. Will you be willing to hand it over instead?"
"I can't. A demon who is actively trying to destroy this world shouldn't be allowed a wish to begin with," she replied coldly.
"A demon who slipped into the Holy Grail War..." Golden portals opened behind her, the tips of swords and spears glinting as they aimed at him. "...shall not seize the miracle!"
With a wave of her hand, the treasures shot forward. Tsutsumi charged straight into the storm.
Form Ride: Build! RabbitRabbit Form!
Crimson armor assembled across his body. His rabbit legs carried him in zigzags, bouncing off the ground and redirecting momentum to avoid the barrage before he leapt directly at her.
He swung his fist, she blocked with her forearm. The impact sent her skidding back, while he rebounded, hitting the ground running, weaving through the rain of weapons.
"Your power... There are no Heroic Spirits with abilities like yours. Not even the King of Heroes has record of such weapons. Just who are you!?" she demanded, voice still cold.
"Just a passing-through Rider. Remember that."
He blurred forward, slamming into her. They tumbled, Tsutsumi pinning her down with his fist raised. A volley of swords rained again, forcing him to spring away as the ground exploded beneath the steel storm.
Chains erupted from the portals, wrapping tight around his limbs.
Attack Ride: Invisible!
His body shimmered out of sight. She spun, searching.
Final Attack Ride: A-A-A-Agito!
The announcer's voice made her react instantly; she summoned a golden shield. His kick struck, shattering the barrier but halting his finishing blow.
"You lowly demon!" she snarled, unleashing more weapons.
Form Ride: OOO! Latorartar Combo!
The Lion Head emitted a blinding light. She flinched, eyes narrowing shut. In that instant, he dashed forward on cheetah legs, claws poised. His strike tore through her defenses, sending her sprawling.
She retaliated, swords detonated where she had stood, the explosion flinging Tsutsumi back. Both fighters rose again, scarred and breathing heavily.
His Decade form flickered and collapsed, leaving him in torn, bloodied clothes. A sword jutted from his shoulder. He yanked it free with a grimace, tossing it aside.
She glared coldly. "So, you're finally running on your last legs. You're no longer wielding the power of a Heroic Spirit. Just a human now with no power. You have no chance of winning, give up and accept your fate."
Tsutsumi wiped blood from his lips, his voice steel.
"What was that about no power? You're slow on the uptake, King of Heroes. Because my power... is my own existence!"
She unleashed another volley. This time, Tsutsumi raised his hand.
An Aurora Curtain opened before him, swallowing the incoming weapons. A second Curtain unfolded behind her, spitting them out.
"Nani!?" Her eyes widened as her own arsenal exploded against her back, throwing her across the ground.
Final Kamen Ride: Build! Genius!
Before she could recover, Tsutsumi, moving at a speed far surpassing his previous speed, directly appeared before her and drove his blade into her. She coughed up blood before her form started to fade, leaving an Archer Card on her back.
He then wrenched the blade free. Reaching down, picked up the Archer Card and turned to leave.
A sudden grip clamped on his ankle. He glanced down, the golden-haired woman, broken and stripped of her borrowed armament, clung to him desperately, her wounds leaving her body exposed, yet she didn't give up.
"Your actions will doom this world... you monster..." she rasped, blood on her lips.
"I don't have time for you," Tsutsumi said flatly, shaking her off before walking away.
The barrier that once repelled him no longer stood in his way. With the Seven Class Cards in his grasp, the keys to ending the Holy Grail, Tsutsumi passed through without resistance.
The cave was dark and damp, the sound of dripping water echoing against stone. He stopped at a shallow puddle, its still surface reflecting his tired face.
"It's been a terribly long time, Julius," Tsutsumi said calmly, staring at the boy reflected opposite him, the same boy who had stolen his sister, the same one he once call a friend. His voice hardened. "Give Miyu back."
"If I did, I would be a traitor to mankind." Julius's tone was cold, unyielding. "Within her lies humanity's salvation. A way to preserve this world from the tragedies of its inevitable end. Do you think I'd discard all that… for your petty sentimentality!?"
His voice cracked with anger, eyes burning with conviction and hatred. "It's not even funny. It really isn't. Something like that is the worst kind of evil!"
Tsutsumi's gaze softened for a moment. "I see… so that's it. You were fighting alone this entire time too."
Julius clicked his tongue, furious. "Don't act like you understand me!"
"But I do."
Those words made Julius falter, if only for an instant.
"Kill one to save many. I knew someone like that," Tsutsumi said quietly, memories of his adopted father surfacing. "Yes… but even so…"
The faces of his time with Miyu filled his mind: her smile, her warmth, her joys. He clenched his fists.
"Julius… you're like another possibility of me. A version of myself that chose a different path."
He stepped forward, his voice steady but firm. "Do you know about the Sakatsuki family? They kept records from the first generation down to Miyu's. The Child of God who can grant any wish… what would the family who controls all that power wish for? Do you know?"
He paused, letting the silence stretch between them before he answered.
"They simply wished for their children to grow up healthy. They could've wished for wealth and prosperity. But all they ever asked for was what any parent would've wanted for their child. And not a single exception, over four hundred years."
His boot came down on the puddle, the ripples shattering his reflection. When the water stilled again, his reflection had turned into Decade.
"If that is considered evil..." Tsutsumi's voice was like iron, "then let me be evil."
He walked past Julius without hesitation. The boy lashed out with his magecraft, desperate to stop him.
But the Aurora Curtain unfolded with a single gesture, absorbing the attack and casting Julius away, flinging him back to the very place where he had first kidnapped Miyu.
And Tsutsumi moved forward, leaving him behind.
As Tsutsumi Ryoko walked deeper into the cavern, the path finally opened into a vast chamber. At its center stood a towering altar, a massive magic circle glowing faintly beneath it.
And there, lying motionless at the altar's heart, was Miyu.
The sight of her made his breath catch. Relief washed over him like a tide, his tense shoulders loosening for the first time in what felt like forever. A genuine smile, fragile but real, broke across his lips.
"Ryoko-niisan…?" Her soft voice trembled as her eyes fluttered open.
He swallowed hard, forcing his voice steady. "I'm sorry… for making you wait so long."
"Why did you come?" she asked, her words sharp and trembling all at once. His smile faltered, and he froze.
"If this ritual fails… the world will end," she continued, tears gathering in the corners of her eyes. "If it collapses… this world dies. And so will you… Onii-san."
Her tears slipped down her cheeks, falling against the cold altar stone. "I don't… want you to die…"
He took a slow step forward, voice gentle but firm. "And why would I just stand by and wait for you to be sacrificed."
He continued to approach her. The Aurora Curtain flickered faintly at his side, then slowly all around them, like doorways waiting to be opened.
"It goes without saying… I'm an older brother. So I have to protect my younger sister, don't I?"
Miyu widened her teary eyes, and the Aurora Curtains turned into the images of other worlds. From an open flower field, to the morning sea overlooking the sunrise, to the busy city of Tokyo, to even the outside of their own home.
"I'm sorry for keeping this ability a secret for so long... this is one of my mistakes. The power to travel to different worlds... I should have shown it to you earlier... I'm sorry." His voice broke into a smile, soft and warm.
Miyu's lips quivered, her tears falling faster. He knelt down beside her, taking her small hand into his own.
"I know I made a lot of mistakes, but loving and having you as my little sister is not one of them. You don't have to do this anymore. Let's go home, Miyu." He said with a smile as she clung on tightly to his hands.
She sobbed, holding on tightly to his palm. "Right... let's go home together, Onii-san."
The Aurora Curtains shimmered, its endless expanse pulling open to reveal not chaos, not void, but a home. Similar to theirs but still different, then they swallowed them both..
The cold cavern vanished. The oppressive air was gone. In its place was the warmth of a house, the wooden floor solid beneath their feet. Miyu, still in tears, clutching tightly to his hand, falling to his strong hand, Ryoko helped her stand up, her other hand brushing the wall as though afraid it would dissolve into mist.
It didn't. It was real.
Her lips trembled before breaking into a sob, tears of joy this time, as she clung to her brother, unwilling to let go.