Indeed, although Kaito trusted Cao Cao, the DNA passed down by ancestors couldn't be discarded either.
Inevitably, Kaito ended up holding Illya in his arms, and Illya was also happy to be held like this by Kaito, her little legs swinging back and forth on his lap.
"Hehe, Kaito, see, my daughter is really cute, right?"
"Mm, indeed."
Kaito nodded without denying it.
"Then how about you become her father? She's always wanted a father too."
"Oh? Have Uncle Kaito become my father? If that's the case, Illya agrees! Uncle Kaito is so handsome, so gentle, and gave me such delicious cotton candy."
The moment Irisviel proposed it, Illya immediately agreed.
Well, maybe Illya really did want a father.
After all, Kiritsugu wasn't really her father, just an assassin hired by the Einzbern Family.
Illya's birth didn't require any outsider at all; the genes of the Winter Saint passed down through the family were sufficient to create her.
Irisviel was born this way, and naturally Illya was as well, only she was born from Irisviel's womb.
"I have no objections, if you're both willing."
"That's wonderful, Illya! From now on, Kaito is your father, and Mama can have a husband too!"
Hahaha.
After Kaito acted according to the contents described in the true teachings of Cao Cao's biography, Irisviel happily pounced over, sat beside him, and grabbed his arm.
In fact, during their time living on the island, Irisviel had already developed quite a liking for Kaito.
Especially when he carried her in a princess hold up to the mountain peak, that's when the thought began to form.
She wanted to be a mother, so Illya was born.
But at the same time, she also wanted to experience love, to have someone to rely on, so she set her sights on Kaito.
Irisviel's personality was actually quite open. She didn't have other thoughts about Shodai and the others; as long as she could taste the feeling of love, she would be satisfied.
And this way, Illya could have a father's love too. It's killing two birds with one stone!
"Father! Illya has a father now!"
Illya became lively in Kaito's arms. But next, they had to face the current head of the Einzbern Family, Acht, full name Jubstacheit von Einzbern.
He was like Matou Zouken, an old monster who had lived for nearly two centuries by continuously extending his life.
Perhaps living too long had twisted his ideals, leading to the current situation with Irisviel and Illya.
However, he was at least much better than Zouken, not nearly as hateful.
Just letting him retire later should be fine.
After all...
Could he not understand Irisviel's little scheme?
As long as she won the Holy Grail War, she would immediately become the undisputed Clan Head, and Acht, having fulfilled the Einzbern's long-cherished wish, could directly retire on the spot.
Precisely because she was confident about the Holy Grail War, she didn't want to be Clan Head, nor did she want to be tied down by many affairs. She just wanted to have fun!
And if Kaito became her husband, wouldn't that mean he'd automatically take over from Acht as the Einzbern's Clan Head in the future?!
"Welcome, guest who has traveled from afar."
Acht arrived, already fully aware of what had happened in the living room.
But he said nothing. Since returning from the parent-child activities, Irisviel had already spoken to him about Kaito.
She even had photos.
Although he was curious why Irisviel's phone was so advanced, completely unlike anything from this era…
Upon learning of Kaito's strength, he thought it over and decided this might be a very good choice.
Especially when Irisviel said that with him, victory in the Holy Grail War was guaranteed, he agreed without hesitation.
All he wanted now was for the Einzbern to achieve the Third Magic. He sought nothing else!
Even if the Einzbern Family didn't achieve it directly, as long as Kaito became part of the Einzbern, it would still count as the Einzbern achieving the Third Magic.
"Greetings, Clan Head Jubstacheit."
"Hehe, you can just call me Clan Head Acht."
Acht resembled a church leader in some ways, with his long hair and beard both straight and white, paired with his wide robe adorned with golden patterns. No matter how you looked at it, he had that kind of aura.
After Acht sat down, he didn't drink anything, just stared directly at Kaito, even secretly using magecraft to observe Kaito's body.
Don't misunderstand, it was just to gauge Kaito's strength.
Soon, Acht's squinting eyes flew wide open. He was shocked by the dense concentration of Magic Circuits all over Kaito's body.
'Even Illya didn't have as many as him!!'
'And in terms of energy, he far surpassed Illya several times over!'
'With such immense magical energy, he could summon at least three Servants in one go, without even relying on the support of Fuyuki's leylines!'
"It seems I've grown old..."
Acht sighed, filled with admiration for Kaito's strength.
That's how magi are.
When someone is far stronger than them, they feel immense admiration.
Witnessing Kaito's terrifying Magic Circuits, he also believed Irisviel's words.
"Alright, Irisviel, I agree to that matter. Although I won't witness it personally, I believe you will fulfill the Einzbern Family's long-cherished wish!"
Before Kaito could say much, Acht was already resigned to his fate.
Because he also knew his heart had begun to twist, to become pathological. Moreover, every additional period he lived consumed vast resources. So, for the sake of the Einzbern Family, he needed to die.
This era no longer belonged to him, but to Irisviel!
As for Irisviel's physical problems, hehe, let Kaito worry about that himself!
After all, there was still Illya, wasn't there?
That's how twisted Acht was.
After saying his piece, he also gathered everyone in the Einzbern Family with Clan Head decree.
That afternoon, Acht acted swiftly and decisively, stepping down and handing the position of Clan Head to Irisviel, then chose a coffin and retired.
'That decisive? It seemed Irisviel had done quite a bit of groundwork.'
Kaito watched the whole scene unfold and could only smile helplessly.
He had been thinking he'd need to help out somehow,
But the moment he arrived, after his strength was assessed, it was all resolved?
'Damn, isn't this the feeling of "I haven't even started showing off, and you're already backing down"???'
"Ahem! Everyone, look at me! As the current Einzbern Family's Clan Head, I want to announce something important!"
"I have now become husband and wife with Kaito, so I hereby hand over the position of Clan Head to him. From now on, you will all consider him your Clan Head, understood!"
The Einzbern Family's members were dumbfounded, looking at each other, but upon seeing Kaito, everyone nodded.
Because the Clan Head's authority was absolute. Whatever Irisviel said, goes.
Just like that, Kaito became the Clan Head.
"... I thought it wouldn't be this fast, but I've been here less than half a day, and I've already become your Clan Head."
"Hehe, darling, I'm entrusting Einzbern to you now~"