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Within DxD, as Set sitri

A man died, as he tried to save his twin brother, and a little girl who he doesn’t know, from that flaming hell place. But when he opened his eyes, at first the man thought he is in the void, only to later on to discover, the darkness wasn’t the void, but in fact in the stomach of his new mother, along with someone else. If that wasn’t shocking enough, to be reborn as an unborn baby. Once he left his new mother’s stomach, not only he discovered he also a twin in this new life as well. But he is also a Devil!? What kind of crime he did in his first life, to not be sent to hell! But to be part of it!? And to make matters more confusing… why his is Demonic Power reserves monstrously high, even greater than any recorded High-Class Devil? Not only that, but his physical body also evolving stronger. And his ability as a Sitri, the ability to weld Water, he doesn’t need to train it, he just knows instinctive level, how to weld it… and how to even switch between Water and Ice? Why the *beep* is going on!? - This is a fanfic of a man who never got the chance to read or watch anime, has no clue he is reborn as the twin younger brother of Sona Sitri, and younger brother of Serafall Levithan, in the world of Highschool DxD. And what more, the man who now known as Set Sitri, the youngest child of the House of Sitri, has no clue all of this happening due to his twin brother of his past life. He has no clue his twin brother has died, and met ROB, who used two of his three wishes on his own brother. This is story about an overpowered Devil, who trying to fit in this strange world. - - - - - - I don’t own DxD, nor do I owned the events besides the original events I had written, that are outside the canon events. I only own my MC, and those original events, and Original Characters that are in the fanfic. Only ‘one’ OC will be in the harem of MC. (You will understand why I did this, when you find her) Warning: This Fanfic contain sexual content, known as lemons, I believed or smut chapters. Look for (+18) in the chapter title, will tell you they are +18 chapters. Meaning don’t read them if you under 18, and especially don’t read them around your parents.

AnimeDamon · 漫画同人
分數不夠
7 Chs

Ch.2: Monster

As a Great Satan, Serafall has many duties, besides her so-called hobby, or her Tv show which she just started, Miracle☆Levia-tan.

It been ten years since Serafall found about the existence of Magical Girls, at first it was just pure curiosity.

But she never thought it will help her to forget her times when she was nothing but a Monster.

Over 500 years ago, after the Original Satans died, the houses that related to the Original Satans, along with others from the 72 Pillars wanted to restart the Great War.

But not all of the Devils wanted this, as they only saw the end of their race if they tried to attack the Fallen Angels and Angels.

While it was true, they are still recovering from the Great War, but so was they.

And because of that, the Anti-Satan Faction was form, and war that soon to be known as the Devil Civil War begun.

Serafall still remembers the day when the City of Lucifaad was full of massacred and mayhem. By chance, she along with some of her friends, Ajuka Astaroth, Falbium Glasya-Labolas, and also Sirzechs Gremory was meeting in that very city.

Since their clans are close to each other. And also classmates at the same academia. She and along with others besides those three, came to Lucifaad right before someone from the Beelzebub Clan came, and ordered the massacre.

She still remembers that day, like the naïve Devil she was. She was truly happy to meet with her friends from the academy in Lucifaad.

Not to mention, since most of her friends are heirs to their houses, like she was, it was very important to her, and her close friends to build and strengthen their ties.

However, as a day that should be as joyous as it should be. Soon become a living hell, when all the senseless slaughter happened in Lucifaad.

To make the matter more dreadful, the Old Satan Faction has ordered all of the High-Class Devils in Lucifaad at that time, to stay out of their senseless killing of lesser ranking Devils in Lucifaad City.

If they happened to disobey, without a doubt, the Old Satan Faction would have killed them without proper reason.

That massacre in the City of Lucifaad soon become the very spark of the Devil Civil War.

Along Sirzechs and her friends in the lead, they all battled against the Old Satan Faction, as the Anti-Satan Faction.

At the beginning of the war, Serafall felt she were doing the most noble thing as a member of the Anti-Satan Faction, someone to bring the end of the wrong ways of the Old Satan Faction.

But war is war.

And war is never a kind place to either side, especially to those who fought on the frontlines like herself.

How many times, as she watched her ability as a Sitri, her Water downed the ground with crimson blood?

How many lives her Water took, to the point she felt a killing machine, that slowly feels a part of her became missing?

And to make things more complicated in her life on the frontlines.

Her Water, the pride of Sitri, became Ice, in her world that became dull due to all the senseless killing she has done.

And once she able to weld Ice, like she could with Water, the speed of her reaping the lives of their enemy increased by many times, earning her the title of a hero in this civil war.

However, as many called her a hero. All she saw in the mirror, was a monster in her flesh and skin.

A monster that reaped so many lives, the monster no longer the naïve Serafall Sitri she was before.

At the end of the war, when Serafall offered to became one of the Four Great Satans, she didn't refuse to become one of the four leaders of their race.

However, even if she has become a Great Satan, one of the main leaders of their race. The monster in the mirror, who share the same appearance as herself, covered in blood, and still smirking at her, never left.

So in the end, Serafall buried herself in her work as a Great Satan, all so she could forced herself to forget about that monster in the mirror.

While many didn't notice this hollowness within Serafall, someone did. And that person was no other than her own mother, who see through her mask known as Serafall Leviathan, one of the Four Great Satans.

She saw the burden her daughter carried, while many called her a hero, her daughter, even for a Devil, she is a kind soul even among the Devilkind.

And her life on the frontline in the Civil War made her became lost in herself, hollowed her heart, and to become a different person she was before the Devil Civil War.

That is why, due the burden Serafall carried, her mother, Zlata Sitri, advised Serafall to find a hobby to take her mind off her past, besides escaping into her work as a Satan.

Her mother advise was either talk it out, or do something she will enjoy, to refill the hollow in her heart. And that what she did, she tried chess, that her father liked.

But she never been much of a fan with chess. She tried all sorts of Devil liked hobbies, but nothing clicked, until that day, the day when her interest was spark behind the words of an anime character from Magical Girl Milky Spiral Seven.

It was words she never forgets, and their actions, that seems to spark hope in the hearts of young children triggered something in her.

And she found it, her true purpose in life, not to be a Satan, even if its important work she cannot overlook. Not to be a Monster. But to be hope for children of her race. To spark hope, like Mil-tan from Magical Girl Milky Spiral Seven.

Which is why she wears the same pink cosplay dress that Mil-Tan wears, and even studied the show for ten years. Others might think it is her hobby, but to her, to Serafall Leviathan, no, Levia-tan.

It was her true life calling, to become an icon for the young Devils, to become someone that will bring hope, and aspire the best of all Devils no matter of their social class, who they are, as long they are a child, they have all rights to dream, that is the message that Mil-Tan taught Serafall, and this is the message she wanted all young Devils to have.

And like that, on the day she found out, she will be an elder sister. Serafall saw this as a sign to begin her plan to aspire hope in all.

It was time to become Levia-Tan of Miracle☆Levia-tan. To become the Devil's world version of Mil-Tan, and to become not the monster, she no longer sees in the mirror. But a Magical Girl, that will aspire and scary away the Monster in the mirror, if that time were to come.

But a shame, as her duty as Levia-Tan and a Great Satan, caused her to miss out of the births of the twins, Se-Tan and So-Tan. (AN: Yes… Sona it was decided before birth)

And a month later, she finally got the time to see her little brother and sister, that given her the sign to begin her plans. And also unfortunately begin her obsession with them.

Along with a perfect plan, Serafall headed right to her the room where the babies are, after a maid told her. She didn't greet her father, Lord Sitri, or her mother, Lady Sitri. Instead, she teleported right in middle of the room that her younger brother and sister are in.

"Ta-Ta! Your favourited magical girl is here! Levia-tan☆!"

Serafall shouted along with a perfect pose, and nodded inside her head, that she nailed it. Not noticing she just earned a very confused and blank look on one of the twins when she did so.

Instead, she turned her attention towards the closet one among the twins, that she believed the one known as So-Tan.

Serafall smiled when she noticed So-Tan chewing on that soft blue sea dragon teddy bear that she got for them.

Of course, that not the only thing Serafall has sent to her parents for her little brother and sister. In fact, in a certain room in the Sitri Castle is full of toys and clothing that Serafall has spent a lot of money on.

Serafall even wanted to gift them more, like a castle or two in their names… however, when she asked her parents about that matter, they told her off she is overdoing it, and stop sending more presents for the twins…

She only send them total of 4,101 toys, 532 sets of clothing, that too little in her books. But in the end, not even this Great Satan could go against her mother, Lady Sitri, when she mad with her.

Feeling a little guilt she cannot send more, Serafall went towards the one, she believed called So-Tan, and show a widen happy grin, as she saw So-Tan going towards her on all fours, and even trying to grab her. Even if in reality, in the eyes of the young month old Sona, she saw her elder sister nothing but a toy.

"Oh mine~ You happy to see big-!?"

However, the next moments caused Serafall to froze, as her mind as a soldier, and a Satan kicked in, as she felt Demonic Power that could rival a Low-Class Devil came from somewhere.

Even if she knew, before a Satan-Class being like herself, a Low-Class Devil is nothing but a bug, she could easily destroy with a flick of her finger.

But that didn't stop her coming so mad, that someone dared to break in her little brother and sister room, when she came here. And unlashed their Demonic Power, no matter how low it is, but the hostility could be felt within that Demonic Power!

All Serafall wanted to ripped the heads who came in this room, with that hostile aura, however, only a moment later, before Serafall could unlashed her killing intent, her mind froze, when she saw the one with the Low-Class Demonic Power, that seems to be still increasing in power and volume.

Is no other than Se-Tan!? Her younger newborn brother!?

Serafall mind went blank, as she looked at her Se-Tan.

Was she dreaming?

Is this real?

How can a one month old Devil has Demonic Power reserves, that suddenly now has reached the Greater Low-Class level!? And it still rising!?

Serafall soon snapped out of it, as she rushed like the wind right next to Set Sitri, and a cast a spell to seal his Demonic Power right away.

If she didn't seal his Demonic Power, Serafall afraid this amount of Demonic Power, that shouldn't belong to a month old Devil, might kill him!

And from the result of the spell. Or maybe from the pressure of having Greater Low-Class level Demonic Power at his age. Caused Se-Tan to fall sleep, while So-Tan looked confused, but still went on her mission to grab her sister's wand.

"Why… why does he have that much Demonic Power? N-No wait… d-did he saw me as someone hostile!? No, no, this isn't the time for this… this is very serious, too serious…"

Serafall went sadly at first, seeing one of her dear siblings already hate her. But soon her faced turned serious, before she picked up both Sona and Set in her arms, and head to her parents.

She also examines Set's body, and her eyes widen sensing the Demonic Power is naturally hiding itself. How can Demonic Power naturally hide itself?

She never heard anything like this before, only way to sense the Demonic Power in Se-Tan's body, is through physical interaction, otherwise, not only herself, a Satan, could feel anything in him.

And furthermore… is her mind playing tricks on her? She could feel his bloodline ability is slowly awakening itself, which shouldn't happen until he is 6 years old.

It is known fact, that High-Class Pure-Blood Devils naturally have High-Class level of Demonic Power the moment they reach 18 years old.

The Original Satan, Lucifer along with Lilith his wife, created the Devils to become like this, not the Low-Class ones, but the Pure-Blood ones.iPu

It is known fact, the moment a Devil of High-Class birth becomes 6 years old, their Demonic Reserves becomes to the level that can rival any Low-Class Devil. And if they have a bloodline ability or not, they will also awaken it at the age of six no matter what.

When High-Class Devils become 12 years old, their Demonic Power reserves become that can rival Middle-Class Devils, and finally at 18 years old, their Demonic Power reserves naturally become High-Class level.

This is the reason, no matter how many Devils tried increased their Demonic Power before the age of 18, it wouldn't increase.

And once you become 18 years old, you can train to increased your Demonic Power Reserves, that is how she, and others like Sirzechs increased their Demonic Power to Ultimate-Class level or beyond.

And only those from the Original Satan bloodline clans, that are now in hiding can have Devils naturally formed their Demonic Power to peak of High-Class or into the early stages of Ultimate-Class.

Of course, that was in the past.

In the end of the day, a one month old baby shouldn't have Low-Class level of Demonic Power inside them. This is unheard off, and if it like that now, how high it will be, the moment he will become 6? 12? Or when he fully matured as a Devil at 18?

So it no wonder why Serafall became serious. And also worried, if her little brother will be harmed by having this level of Demonic Power inside him.

It is unheard of, and as a Satan, and his sister, she has to deal with this matter seriously, the last thing she wanted is her little brother to blow up at any given moment!

"Oh Serafall, you back…? Why do you have?"

"Hmm, my oldest, you… why are Set and Sona with you?"

The moment Serafall teleported to where she expects her parents to be. In the main drawing room. She looked at the two people before her.

One is a beautiful woman with black hair, and blue eyes, like her own. While the other one is a handsome man with the same kind of black hair, and violet purple eyes.

The two of them looked to be either in their late 20s or mid-20s. But their real age is actually over or around 1,000 years old.

Due their lifespan as Devils, that naturally of 10,000 years. There hasn't been a Devil that grown old enough to look like a old man or woman yet.

The man with the dark purple eyes, looked at the twins, his son and daughter, and then turned his gaze towards his oldest child, who worn a serious expression on her face.

When the handsome man, who looked very much like some kind of British gentleman movie star, saw the expression of his oldest, the man who known as the head of House Sitri, Lord Sitri, as well Aidon Sitri, cannot help to be alarmed, that something is not right.

"Something the matter… is something wrong with Sona and Set?" Went the black haired beauty, Lady Sitri, who also known as Zlata Sitri, she is the mother of Serafall, Sona, and Set.

She looked at her oldest child and knew her serious look is no good. She even used her senses as a Devil, too looked at her babies, but she felt nothing of alarm… besides, why cannot she sense any Demonic Power from her son?

Normally you wouldn't check the Demonic Power in a child as old as one month old. That Zlata and many of the servants wouldn't noticed the lack of Demonic Power in Set, her youngest child.

Not to mention, even Sona has very little amounts of Demonic Power developing inside her body.

However, as this was shocking, this wasn't enough to become serious. It not unheard off, for Devils of High-Class birth or any birth to begin Demonic Power at a more later stage.

And he didn't matter if her son is a late bloomer, because in the end, once he turned 18, he just need to increased his Demonic Power reserves through training, to recover the loss of Demonic Power

However, her oldest next words, caused her to think otherwise.

"It is about Set… tell me, can you sense any Demonic Power?" Serafall went with a serious look.

"What you mean… no, I don't, but he's a month or so behind, it no big deal, your grandparents told me, I was three months behind, compared to others. But it worked out fine for me." Aidon went.

"Your father's right, it not that uncommon… but that looks on your face, telling me otherwise." Zlata went, as she got up from her seat, and she placed the book she was reading to the side. And walked to her children.

"Mother, sensed his Demonic Power while holding him." Serafall went, as she offers the twins to their mother.

At first, Zlata looked confused, but still took her son and daughter. And did what her oldest asked.

And like that, her blue eyes widen in disbelief, as sensed Demonic Power, that naturally hiding itself, for some reason.

Zlata has a blank look on her face, as she felt Demonic Power that rivals a Greater Low-Class Devil, and soon her blank face became pale, as she looked at her oldest.

"What… is this, Serafall… why is his Demonic Power is like this? And why is it already nearly at the peak of Low-Class?"

As soon Zlata asked this, Aidon Sitri narrowed his eyes, and vanished and reappeared behind his wife and his oldest child, as well checked his only son's Demonic Power up close, as his expression turned serious, unlike his wife's shocked and pale expression.

"This… is unheard of. Wouldn't it be dangerous to have this much Demonic Power in his body?" Aidon asked his oldest, as he unsure himself. The amount of Demonic Power is small amount, in the eyes of the High-Class Devils. But to find it in a High-Class Devil child, that only a month old?

That is monstrous, unreal, and very unsettling.

After all, in all history of the Devilkind, there never been a child with this much Demonic Power at this age.

There was a time, when the Old Satan Faction experimented on young newborn Devils in the Great War.

Hoping a way to increased the amount of Demonic Power in their bodies, but the result?

Death, as it proven that having even a half of a Low-Class Devil amount of Demonic Power, is very dangerous for those at less 3 months old. And yet, his child before him, is not even 3 months old, but already has so much Demonic Power inside his body.

"I don't know… as you know, this never happened before. While is true, once in a while a High-Class Devil child, could become a Middle-Class the moment they turned six years old. But that chance is like one in a billion… but Se-Tan here… the amount he has, should killed him. And yet, I think because his Demonic Power forming in a way to make it hard to sense, might be the reason why his body hasn't broken or became destroyed. But honestly, that just a guess." Serafall went with a long sighed.

"I think we need to take him to Ajuka; he might have better insight. However, we need to make sure, not even the elders knew that Se-Tan has this amount of Demonic Power. It will cause unnecessary trouble for us, and especially to Se-Tan." Serafall went.

"You right, Ajuka might knew a thing or two about this." Zlata went, due to having a Great Satan as their daughter, there been times the other three Satans of the Four Great Satans would visit the Sitri Castle.

They come to greet Serafall who often visits her home. Or have one of their meetings here sometimes, if necessary.

Due to this, Lord Sitri and Lady Sitri, knew the Four Great Satans more personally, just like the Gremory do as well, due to Sirzechs, their eldest son also a Great Satan as well.

"Okay, it not like the elders or the others will notice, unless they up close. Enclose this matter, like Serafall said, we don't want unnecessary trouble to our youngest. Especially when we have no clue, what we dealing with." Aidon went with a sigh.

And like that, the three of them teleported to labs of Ajuka Beelzebub.

Sorry for any grammar mistakes.

And remember to add this to your library if you like this.

That all, and thanks for reading this fanfic.

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