Honkai: Star Rail — Kamen Rider!

When Titania accepted and grasped her Path, she had already glimpsed everything, already understood all.

In this universe, the essence of every lifeform was etched into her awareness. She had come to know the loneliness of all existence.

The loneliness of life. The loneliness of death. The loneliness of living. The loneliness of half-living, half-dead.

All of it—all of it—was inscribed into Titania's mind. And because she understood loneliness, she could grasp all the more clearly her noble and exalted goal.

To fill the entire universe.

To create a world with no cold, no solitude.

To be with companions—what greater beauty could there be?

But in the universe, there were existences that threatened her companions.

The first: Voracity, whose Path was devouring, who sought to swallow the entire cosmos whole.

He had wished to eat all things, everything in existence, and once fought an unprecedented god-battle against Titania's predecessor, the former Aeon of Propagation.

Though to call it a "god-battle" was hardly accurate—one side endlessly propagated, the other endlessly consumed.

Their Paths were destined to clash.

The second: the Aeon of Nihility, IX, whose essence was that nothing mattered.

Though IX posed no direct harm, his existence alone hindered Titania's future.

For if Nihility remained, then Titania could never fill the universe with companions. There would always be a cold, barren place.

That was something she could not, would not accept.

Thus, Titania needed special companions who could counter these two beings.

But before, she had no answer to how.

Other beings at the peak of their power had slain her predecessor.

So Titania no longer trusted anyone else.

Without allies, and without strength enough alone, her path had seemed like a dead end.

But before she fully ascended, she had sensed a power—

A power not only capable of severing even the divine bodies of Aeons… but one that could fill Nihility itself.

Such a power could resist Voracity. Such a power could make Nihility no longer Nihility.

Though it had been but a fleeting instant, that power was without doubt what she sought.

The indispensable force to realize her perfect vow.

Thus she raised her blade, to transform that power into her companion.

She would make Hoshigaki Sora her closest ally—even though he had shown her malice.

She wanted him to help her, to create a cosmos without cold, without enemies.

That was why her strikes always held back—why she never aimed to wound him fatally.

The battle dragged on, their outputs waning.

But for Titania, Aeon though incomplete, decline was meaningless.

Her "fatigue" was measured against the divine scale, not mortal.

If she wished, she could sustain this for a day or more.

But that wasn't her goal.

She wanted only one thing: to make him her companion.

So she applied one of the simplest techniques she had learned from the reflection of the Tree.

Sora's body hung in midair, exposed, his target lost. His silhouette was clear against the empty void.

Titania only had to beat her wings, and her form shifted seamlessly.

Her right arm stretched into a pure white blade, cleaving a curtain through the sky, swinging straight toward Sora's chest.

Any life struck by that blade would transform into her companion.

Organic, inorganic, down to the smallest cell—it would be made hers.

Time seemed to slow to a crawl. Titania ignored Sora's small gestures.

[You have no means left to resist.]

Whatever you do, Sora—your future is already decided.

Become my companion. Together, we will remake the universe.

There are no other choices.

Sora looked at the blade racing for him—and slammed a two-tone buckle, blue and yellow, into his Driver.

'[SET!]'

'[DUAL ON! GREAT. MONSTER! READY, FIGHT!]'

Stars etched themselves across his chestplate, two golden marks shining.

His sword dissolved—replaced by weapons like massive gauntlets.

Kamen Rider Tycoon – Bujin Sword: Monster!

The [Bujin Sword Buckle], fused with the [Monster Buckle], birthed his ultimate derived form.

And what special power did this form hold?

None.

Except this: Raw, unfiltered power stacking.

Every [Buckle] loaded into Bujin Sword was strength upon strength, a pure multiplication of force.

And with Monster's addition—his might skyrocketed.

Titania did not know this.

All she saw was his colors shifting, his form altering in an instant.

And then—something unimaginable happened.

['GREAT MONSTER VICTORY!]'

Sora's fists burned with yellow radiance.

His heart—the human engine—roared like fire.

The [Idealistic Power] coursed through him, fueling him, and beyond that—

He felt the trust of the Fyrefly warriors, unwavering, absolute.

The [Bujin Sword Buckle] itself gleamed emerald, answering their belief.

Threefold fusion. A power on his fists that bordered on transformation itself.

Energy swelled, greater still, until his fists glowed with crushing force.

He swung against the descending blade.

CLANG!!

A crystalline sound—and then a storm unleashed.

The collision burst into a gale that swept in all directions.

The winds howled. Dust surged.

The earth, already fractured, ripped apart, pits yawning deep as their clash cratered the ground.

Even the planet's rotation faltered, skewing its axis.

The shockwave scythed through the land like artillery.

Buildings split in half. Structures turned to powder, fragments hurled dozens of kilometers away.

The clone army of flesh and bone? Erased. Nothing left, not even blood, not even ash.

The Fyrefly squad, their Nihility flames nearly snuffed out, were hurled into the sky, swept far from the battlefield.

"This output is insane!"

Shunji tried to steady herself, but her body was numb from the force.

She stared in awe at the battle far ahead, her heart choking with fear and awe alike.

Even with their armor's data-protection, they could only watch the clash as numbers.

This single exchange carried enough force to obliterate a planet.

If not for Zieltworth being endlessly reinforced by Serus's power, the surface would have cracked to its core.

And this was only the aftershock.

The one who had taken the full brunt—Titania herself—wavered.

Even incomplete, she was still at the highest tier below the peak.

Normally, no weapon short of stellar collapse could touch her.

And yet—she staggered.

Unbalanced. Her body tilted backward, unable to withstand the fused might of his strike.

Sora steadied himself, gazing coldly.

"…The weight you carry on your shoulders is crushing."

He had inherited the sword arts of Saber, their resonance echoing like the ringing clash of steel.

Through that ring, he could feel the burden Titania bore.

Her blade was heavy. Her vow was heavy.

To make a universe without cold, without solitude.

But—

Her method was endless replication. Filling the cosmos with herself.

Yes, such a universe would lack emptiness.

"…But I don't want that world!"

A world with no Robin, no Anna, no Hotaru—

Nothing but endless Titania, identical, save for the time of birth.

That was why he stood here, blade raised against an Aeon.

Titania, though swaying, unshaken in spirit, spread her stance.

From within her, a field surged outward, blanketing the world.

And in an instant—everything froze.

Shards of buildings hanging in the air. The Fyrefly squad rushing back.

All stilled.

[Heavy Acceleration Field.]

The power she had never once used—now unleashed, to turn the tide.

Sora felt his body slow, bound in the stasis.

But instead of striking back, he drew another buckle. A red one.

'[SET!]'

'[BOOST!]'