Irisviel von Einzbern.
As a homunculus created by the Einzbern Family for the Fourth Holy Grail War, Irisviel's popularity is almost on par with Artoria, beloved by many.
In this Fake world, due to Ryuya's arrival, he became the catalyst for Irisviel's birth at the most opportune time.
Inside the research lab filled with various female homunculus maids, this place was different from the outside.
Because Irisviel's main body was female, male researchers could only observe textual data from a larger laboratory outside.
As for the laboratory containing Irisviel's main body, only homunculus maids and a small number of female researchers were permitted entry.
"Ryuya-sama, Irisviel-sama's data is normal. She should be ready to emerge now. What is your opinion..."
Having experienced many failures, the Einzberns, skilled in creating homunculi, began researching technology to combine the Holy Grail with a homunculus.
Creating a homunculus to become the Lesser Grail, possessing multiple times the mana and resistance of an ordinary person, to be used as a tool… this was the purpose behind the birth of the homunculus named Irisviel.
Originally, this project hadn't been underway for too long, but Ryuya's arrival accelerated Irisviel's birth.
He hadn't initially wanted to create homunculi or Lesser Grails, but Ryuya discovered that the research progress on Irisviel was already more than halfway complete, so stopping it now would be equivalent to killing this girl.
Watching the process of her gradual formation from nothing, Ryuya's feelings were somewhat complicated.
After all, even he had never experienced personally creating a homunculus. He now somewhat understood how Morgan and Artoria felt when they created Mordred.
"Mmm, I understand. Prepare yourselves, I will bring her out now."
Waving his hand, signaling the homunculus maids and female researchers to prepare, Ryuya then took a drop of his own blood and let it fall into Irisviel's incubation tank.
Swish...
The blood of the Ultimate Being, the Beast of the Apocalypse, and the King of Myriad Races was clearly not something an ordinary person could withstand. Even a single drop contained immense mana and potential.
Controlling his blood, he erased its violent aspects, turning it into a nutrient that could be adapted by all things, enhancing the host's mana and bloodline.
Only then did Ryuya fuse the blood with Irisviel.
A moment later...
Eyes open.
As those vermilion eyes opened for the first time, Irisviel, fused with Ryuya's blood, awoke.
"..."
Opening her mouth, wanting to speak, but unable to, Irisviel had clearly developed her own consciousness very early.
Able to hear the people around her, able to sense their emotions, the homunculus named Einzbern was like a newly hatched chick, possessing a creature's most basic instinct towards an unfamiliar environment: fear.
Because of the drop of Ryuya's blood, she felt a great familiarity with Ryuya. Enhanced considerably compared to her original version, Irisviel was significantly more powerful in both mana and physical strength.
Forcibly breaking free from the numerous nutrient tubes attached to her, unable to walk, she instinctively lunged towards Ryuya's embrace in an awkward posture.
"Don't be afraid, Irisviel. You're alright."
Sensing the fear of the newly born Irisviel, Ryuya gently held her body, patting her back.
Hearing Ryuya's words, although not understanding the meaning, Irisviel could feel the warmth. Her emotions gradually stabilized.
"Bring the clothes."
Beckoning to a nearby homunculus maid, he wrapped Irisviel in a blanket, then lifted her in a princess carry. Looking at the eagerly watching eyes around him, Ryuya said softly, "The Lesser Grail project is successful. You can inform the others outside."
"Long live Ryuya-sama!"
Hearing Ryuya announce the success of their long, persistent efforts, even the homunculus maids couldn't help but feel joy.
"???"
Not understanding why everyone was cheering, the current Irisviel only knew those people were very happy.
Widening her eyes with effort, snuggling in Ryuya's arms, she nuzzled against the man's chest, finding it very comfortable.
This... was the day Irisviel was born.
…
One month later.
"Master, Master, I want to go out and play."
Because she combined the Einzbern's top-tier technology with Ryuya's blood, Irisviel possessed even greater talent than in the original work.
Knowledge that would take ordinary people years or even over a decade to learn, constructing a worldview, took Irisviel only a few days to grasp.
Learning everything she encountered at an astonishingly rapid pace, Irisviel progressed quickly.
This day, she once again ran to the studio where Ryuya was, watching the man reading a book. Her steps were light, ensuring no one would notice her.
"Iri, you're being mischievous again."
Naturally sensing Irisviel's arrival, Ryuya put down the book in his hand.
Looking at Irisviel with affection, he opened his arms to welcome the girl's dash.
"Ah, Master always senses me. It's so unfair to me."
Her face, exquisite like a doll's, was the culmination of all aesthetic limits. Her body, full of divinity, exuded a fatal charm.
Her vermilion eyes gazed at Ryuya full of attachment. The aura of absolute nobility was the heritage of a thousand years of Einzbern.
But because she had only been born for a month, Irisviel also possessed the childishness of an infant.
She wanted Ryuya to take her out to play.
Compared to those boring lessons, Irisviel preferred to stay by her creator's side. Even if they did nothing, just simply smelling Ryuya's scent was enough to satisfy her.
Sticking close to Ryuya like a little kitten, in Irisviel's view, within the vast castle, only Ryuya was her family.
Or rather, the person she felt most comfortable with.
Sticking intimately to Ryuya, the innocent and kind Einzbern Princess expressed her desire to go out and play.
"Have you finished today's studies?"
"Finished, finished! The teachers even praised me."
Blinking her eyes, Irisviel's study tasks were actually very heavy. Every day she had to read various materials and listen to teachers explain various knowledge.
Things that would be incredibly complex for ordinary people were, for Irisviel, the result of her earnest study and accelerated pace.
Because if she studied properly, she could hear Ryuya's praise.
Because if she studied properly, she could go out to play with Ryuya.
This... was the most beautiful life for the homunculus named Irisviel.
And the time she yearned for the most.