Learning about the family

So apparently, my father Kusanagi Seijiro is from a clan of specialized demon hunters who somehow managed to make a deal with a group of people called the Onmyouji to seal the essence of the reincarnating demons that they fought into their bloodline so they would no longer plague the land. And because of this bloodline, the males born into the Kusanagi clan are born with the souls of demons and the bodies of humans. The females on the other hand are the complete opposite of the males. They're born with the bodies of demons and souls of humans. Due to them having demonic bodies, they tend to have a somewhat demonic nature and try to destroy everything that they can. This lead to the tradition of the Kusanagi clan killing every female newborn before their powers awaken and they end up slaughtering everything.

When my father was young, he suffered from an injury that left him with amnesia and had to be brought to the city in order to treat him. Seeing that my father was more on the intellectual side and not the demon slaying badass spectrum, my grandfather had him move in with a nice family and returned to his clan. He also left behind several counter measures to ensure that if my father sired a daughter they would be... taken care of.

'Thank god that I didn't reincarnate as a woman.'

So with my father's lost knowledge about his background except for his father's name that the family he was staying with told him about, he went on with his life eventually becoming a well respected scientist and banging a hot British super model of a wife and producing the child genius ME.

Oh and there was something about my father having a brother who had two kids name Takeru and Kiseki. Male and female twins, one with the body of a human and soul of a demon, the other with the soul of a human and body of a demon. Funny enough it was thanks to my father's brother being too much of an incompetent idiot that lead to the downfall of our clan.

'Got some strange Uchiha vibes there.'

Anyway, it turns out that on the day of her birth, Kiseki went berserk and her demonic magic ended up killing a lot of people. After that their father tried to kill her on numerous occasions but being the incompetent fool that he was he failed to completely end her life and instead chose to lock her away in an underground box within a small shrine made of anti-magic material (Don't know what the hell that is) on a mountain deep in the forests for numerous years.

And surprise surprise, it didn't end well. Long story short, Takeru found her, taught her what it was like to interact with people on the outside world, then left to train to become a demon hunter or something which made her feel lonely which lead to her becoming mentally unstable, manifesting her powers, and devouring the entire village.

And that's how the Kusanagi clan was destroyed by one little girl.

'Honestly, for a clan of demon hunters they suck. They had a literal demon under their village for years and not once did any of them come up with a contingency plan in case said demon escaped their holdings.'

In Jun's eyes, if they didn't plan for such an eventuality then they didn't deserve his sympathy.

The only parts of the story that interested him was the fact that his uncle begged Orochi who turns out to be over 100+ years old and his ancestor, to kill Kiseki but was rejected. Oh! and that there were demons capable of reincarnating into the bodies of humans until they died along with the clan.

The story also explains why he didn't feel much when Yoruichi tried to pressure him with her reiatsu. His demon soul and demonic power are harmonized to the point that he might as well be a full demon.

Not to mention that he had the bloodline of the demon knight Sparda, the bloodline of a clan of human demon hunters, the actual soul of a demon fused with a reborn human, a enhanced human body capable of transforming into a demon, and a demonic sword capable of slicing open space stored in his right arm.

He was essentially the perfect fusion between a human and demon. The perfect half breed.

It was only after a while that Jun vaguely remembered watching an anime with these characters in them. Though it was unfortunate that he didn't read the light novel and had limited information on the series. Besides some names and weapons, he didn't remember anything about the series as it was never truly memorable to him. The only thing that stood out was how weak Takeru was before obtaining his relic eater. That meant that for the next ten years, Takeru would be useless.

---

"So what do I call you? Ancestor? Great Great Great grandfather or Alpha granddad?"

Sitting in a small room with Orochi and Takeru, Jun rested his cheek on his knuckle and stared at the old man who implanted vampire cells into his body to sustain his youth and live an unnaturally long life.

"Orochi is fine." He said clearly not amused by Jun's joke.

"Orochi it is." He smiled.

"So... how did you become a student of Kariya?" Orochi asked.

"I wanted someone to teach me swordsmanship so my family hired him." He replied.

"Oh? Even if that was the case its impossible for someone like Kariya to name you his successor without you being fairly talented with the sword."

Shrugging his shoulders Jun smiled lightly.

"What about him? Why did you take him in as your disciple?"

Up until this point Takeru had remained silent and unable to talk as he was still processing the revelation of having another family member besides his sister and ancestor alive.

"He begged me to teach him swordsmanship and in my drunken state I agreed." Orochi explained.

"I see... By the way, what is your style of swordsmanship called?" Jun asked somewhat curious of his clan's sword technique.

"The double edged style." He answered.

"Double edged style?" Jun repeated.

"The Kusanagi clan developed two different sword styles in order to combat both humans and demons. The Doubled Edged Style was created in order to fight against demons whereas the True Light Style was developed in order to fight other individuals."

"Two styles for two different opponents eh? How amusing."

When he heard Jun mock their clan's technique Orochi's brows furrowed slightly.

"You seemed unfazed by the revelation of having demons roam the earth."

Smiling at the comment, Jun replied. "Well its like you said, they died with the clan didn't they? So its not like they can come and make trouble for me."

"While that may be true... If you or Takeru here ever have a daughter... You will have to kill her or risk being hunted down by the inquisition."

"The inquisition?" Jun said confused by the name.

"A secret organisation created to combat magical disturbances in the world... though they mostly hunt witches." Orochi explained patiently.

"Witches? You mean like people with magical powers?"

Shaking his head, Orochi proceeded to explain that witches were a different species that had long warred with mankind and eventually lost. In the wake of their defeat, the witches were nearly forced to extinction with only a few able to pass on their abilities to their children. He also explained that witches can be of both genders and can be born from the ordinary humans. The Inquisition's job is to regulate these witches with anti-magic weaponry. Some members of the Inquisition are chosen by sentient weapons known as relic eaters and are able to fight much stronger witches.

"Well... putting that aside, what happened to this cousin of mine who destroyed our clan?"

"Hmm... If I remember correctly, the inquisition captured her and are currently experimenting on her immortal body." Orochi answer unfazed by his descendant's predicament.

"WHAT!!"

Throwing his chair to the floor a frazzled Takeru stood up with anger and shock written all over his face.

"What do you mean experimented on!"

"Oi!" Putting his finger to his lip, Jun indicated for the boy to quieten down.

"You!!"

"Takeru." Orochi suddenly called out.

"Leave."

"M-master I-

"Leave." He repeated.

Lowering his head, the emotional young boy bowed to his master and gave Jun a rage filled look before turning around and leaving.

Once the door closed and his body disappeared from sight, Jun and Orochi resumed their conversation.

"So... what's this about an immortal body?"

Sighing at the question, Orochi went on to give him an explanation. He didn't know why, but for some reason... this boy had an aura about him that made Orochi feel that he wasn't talking to a child, but an equal.

"*Sigh*... Remember how I told you that our clan sealed the essence of demons in our bloodline?"

"Mmm..."

"For the females, their demonic bodies are actually just the reincarnated demons that our clan slayed given human form. Once their demonic magic gets out of control their body changes more to resemble a demon. But Kiseki's demon body... was special. Her body was that of a reincarnated demon called Hyakki Yakou. A demon that was said to become stronger after each death and incarnation. By the time it was reincarnated as Kiseki's body, it had gained the ability to infinitely regenerate itself making Kiseki basically immortal."

'Basically immortal eh?'

"Can't she turn it off?" Jun asked.

"I don't know the specifics but what I do know is that Hyakki Yakou has a mind of its own. Even if Kiseki wanted to die... for its own survival... it wouldn't let her." For some reason Orochi's expression was filled with pain every time he talked about the Hyakki Yakou, but as it wasn't his place, Jun never said anything about it.