[JoJo's Bizarre Adventure + Demon Slayer] Huh? You're Really Not Training Hamon?

She was nothing but a speck of dust.

From the moment she was born, Guang Yu knew this clearly.

She was merely the product of a genetic experiment Dio had created on a whim by fusing Jonathan's cells with his own, a toy to amuse himself when bored.

That was the entirety of her reason for existing.

Two souls were crammed into one body, biting and clawing at each other in that cold castle as they fought for control.

Fei was a vampire, naturally stronger than her. Guang Yu could only scrape by during the day, when Fei couldn't appear.

When Dio finally lost patience with this “failed experiment,” her destined death came for her...

Then the unexpected happened: Guang Yu escaped into another world.

There, she was saved by Lady Amane and carefully guided by Kagaya Ubuyashiki. Little by little, she learned how to be human and began to find herself again.

She wanted to repay their kindness and become useful, but she discovered that fate was still pushing her away.

She couldn't learn a Breathing Style, so she couldn't join the Demon Slayer Corps.

But she refused to give up. Even if she couldn't join the Corps, she still wanted to prove that she could be useful.

Instead, one day she encountered an enemy she couldn't defeat.

Ignoring the second personality's fury in her mind, she waited for death to come, swallowed by despair and helplessness.

Yet another miracle occurred: a voice long dead, preserved only in the memories of her cells, spoke in her ear.

Guang Yu opened her eyes in shock and saw the phantom of Jonathan Joestar.

That day, she learned the Ripple technique.

That day, she combined the Ripple with the sword forms of the Breathing Style and created her own [Ripple Breathing Style].

And from that day on, she could finally use her own strength to suppress the darkness within her.

Fei, meanwhile, used her vampire constitution and extraordinary intelligence to deduce the secrets of Blood Demon Art from every drop of demon blood she consumed.

She could almost perfectly reproduce the abilities of every demon she had devoured.

The number of Blood Demon Arts Fei now commanded was likely beyond even the progenitor of demons to imagine.

And yet, even so...

She was still that speck of dust.

No matter how hard she tried, she could never reach the center of the world.

She had slain countless demons, yet had never even encountered a Lower Rank demon.

One after another, her companions were injured, retired, or killed.

And she remained like an outsider looking on, only ever receiving the news of an ending that could no longer be changed.

The Master died in a suicide attack with his wife and daughters. Muzan was slain. It was all over.

She hadn't managed to be of even the slightest use to the Demon Slayer Corps.

Once again, fate silently sent her back to her original world. Guang Yu didn't even have time to say goodbye to the companions who remained.

Standing on an unfamiliar street, she finally understood...

Perhaps this was when she could finally be of use.

Kill Dio.

And put an end to this futile life of hers.

The main setting is JoJo Part 3! This is a crossover with Demon Slayer! If I can keep writing, there'll be Parts 4 and 5 too. Part 6 depends on how things go. (;´д`)

The heroine has no Stand! (Not sure if she'll get one later, but she definitely won't during the Part 3 period.) She does have the Ripple! She's ridiculously powerful! She's just never met a truly evenly matched opponent, and spends all her time running around the world killing cannon fodder, so she doesn't have a clear idea of how strong she is. But she really is ridiculously powerful!

No romance! No romance! JoJo Part 3 is all about fighting! I'm here for the fights!

I'm going to make it my mission to force every major and supporting character in the JoJo series to learn the Ripple! (Just kidding.)

My writing isn't great, and one hit will shatter me. If you don't like it, you can leave without telling me. If you insult me, I'll definitely insult you back.

Theme: This speck of dust, pushed along by fate, finally decides to walk against the wind