Once the crisis in Miyu's world had been resolved, Izumi gathered the girls—Illya, Miyu, and the others—and returned to another world.
Yes, Miyu came along as well.
It wasn't an accident.
Shirou had entrusted her to Izumi personally.
After learning Izumi could travel between worlds—and that parallel timelines were beginning to merge—Shirou made a decisive call:
Take Miyu with you.
In the future, when the worlds converged, they would meet again anyway.
For now, Miyu had finally made friends—real friends—and Shirou didn't want to tear her away from them.
Think of it as a little overseas trip.
And so, Izumi brought a group of lolis back to Illya's world.
When they arrived, they landed atop Ryuudou Temple on Mount Enzou.
Izumi looked around, both familiar and foreign, and couldn't help but click his tongue.
"No matter the world, this place ends up being important."
"Though… the Holy Grail here is gone."
"And this world looks like it's starting to converge too."
He smacked his lips.
At this rate, every parallel world would eventually be compressed into one.
Illya, having returned home, was ecstatic.
She grabbed Miyu's hand, practically sparkling.
"Miyu!
Come on, let's go home!"
Miyu nodded, but half-heartedly.
Parting from her brother again… she wasn't used to it.
Izumi noticed and spoke gently.
"Don't worry.
It won't be long before you see Shirou again."
Miyu nodded, though her expression remained subdued.
But Luvia had a different concern entirely.
"Excuse me, but why do you refer to Shirou Emiya as 'Shirou the Hero'?"
"Does he actually have that title?"
The others perked up.
They wanted to know too.
Especially Miyu—her brother's name was Emiya Shirou, so why did Izumi insist on calling him with some exaggerated title?
They had wanted to ask for a while, but the chance never came.
Izumi laughed.
"Handcrafted divine constructs, tanked Ea to the face, and ended the Holy Grail War in a single night."
"Miyu's brother is seriously impressive."
"That's why I call him Shirou the Hero."
Everyone stared at him, wide-eyed.
Especially Rin, who was supposed to participate in the Grail War.
"You're joking, right?" she sputtered.
"Ending the Holy Grail War in one night?!"
"That's ridiculous!"
It would require something monstrous.
Heroic Spirits were absurdly powerful.
Shirou was not a Heroic Spirit—just a mortal magus.
The idea was unthinkable.
Chloe frowned.
"Is he really that strong?"
"Is Projection Magic really that powerful?"
She knew Shirou could project weapons.
But this?
She never thought projection could be terrifying.
Izumi nodded.
"It's true."
"Right, Miyu?"
"He even made a wish for you at the end."
"Also, Chloe—did you not know? In the future, Shirou becomes a Heroic Spirit."
"The power you use comes from him."
Izumi's lips curled with amusement.
The girls were stunned silent.
Even Miyu.
She knew her brother had endured countless hardships—but becoming a Heroic Spirit?
"That can't be real," Illya muttered.
"He actually becomes a Heroic Spirit?!"
Her mind short-circuited.
And Chloe's powers belonged to him?
What did that make her?
Izumi chuckled as he started walking.
"Well, believe it or not, it happened."
"Not just Shirou—some of you might become Heroic Spirits too."
"But that was in other worlds.
Now that the timelines are merging, who knows what the future looks like."
He stepped off toward the path down the mountain.
"An Emiya household full of Heroic Spirits isn't that strange."
"In other worlds, most of you ended up that way."
The girls struggled to process that revelation.
Sakura quickly followed Izumi, tugging his sleeve, and Le Fay trotted after them.
Neither seemed interested in Heroic Spirit prophecies.
The rest hurried to catch up.
Illya, bouncing with excitement, tugged his arm.
"So in the future, I'll become a Heroic Spirit too?!"
"Wow, that sounds amazing!"
"Hehe, will I be super strong?"
Her imagination ran wild.
Would she look like her mother?
Tall, elegant, voluptuous?
Illya was dying to know.
Izumi crushed the dream without mercy.
"Sorry, Illya."
"Your Heroic Spirit form looks exactly like this."
"Yep. You don't grow."
He cast a pitying glance at her flat chest.
Illya froze.
"N-n-no way!"
"I don't believe it!"
"You're lying, Onii-chan!!"
"Of course I'll become a cool, sexy onee-san like Mama!"
Illya's voice rose in panic.
The idea of never growing up—terrifying.
Chloe and Miyu exchanged mournful looks.
Izumi's words… were credible.
Illya really did seem like she'd never grow.
Izumi smirked at her teary expression.
"Don't worry.
You'll find out soon enough."
"I'll take you to Rin's world later."
"They're still fighting the Grail War there."
"And ten years from now, your future self joins that war."
"So you'll meet her in person."
His grin turned wicked.
Illya turned pale.
"Aaaaaaaaaahhhhhh!!!
Noooooooo!!!"
Her wails echoed down the mountain as the group laughed and continued toward Illya's home.
But halfway down, Izumi suddenly stopped.
"Wait.
I feel like we forgot something."
Everyone halted.
Forgot… something?
Blank while looking all around.
Did they?
Sakura timidly raised her hand, still holding Izumi's.
"We forgot the big brother named Gilgamesh~~."
…
Silence.
Then realization hit them all at once.