While most believed Error as an unforgivable destroyer, due to the many atrocities that he had committed throughout his life, Error is a far more complicated being than he lets on, and was not always evil in the distant past.

Back in the past, on the planet of Remnant...he was Sans, the original Sans, a normal human with bone magic, the gravity manipulation, the Gaster Blasters, the ability to teleport, the power to recall the resets, in the form of dreams and memories. And yet, even through all of that, Sans still jokes and acts lazy. He lived inside of Mount Ebott, with his brother, Papyrus, who he has a good relationship with even though Sans can be incredibly annoying and irritating for him, until a kid came along, and at first...they were friendly. But than...during a reset, they became controlled by an unknown force, and than, Sans had been force to fight off against the person that had once been his friend. He was the toughest opponent yet, and even than, Sans was still defeated. A bunch of times...until he came with a solution. Sans injected himself with Determination, and while he did almost died, due to how much is inside of his systems, he manage to live through it all. Sans, in spite of the stress survived long enough and was able to defeat the kid effortlessly, at first, which allowed him to hijack the Kid's ability to use the Save Screen. Sans tried to reset back to the point of when he had met the kid...but instead, it simply reset him back to Judgement Hall. The kid did not give up, as they possessed more Determination than Sans, even with the injection, and eventually, Sans was defeated, and nearly died, forcing him to teleport to the Save Screen, for god knows how long, and at that time...he took the name of Geno.

As Geno, he is more powerful than who he once was, but has a very fatal injury on his body, which is only prevented by the powers of the Save Screen, and if he were to ever get out of the Save Screen, his death would resume, and he would truly end. So he is forced to stay in the Save Screen...with the kid, who turns out to have their body stolen by another one, who had been dead for so, so many years. And while he had a companion with him, it did not make things feel any better, and instead, he feels helpless, being trapped in this dimension.

Geno had to sadly watch many times, as he had to witness his species getting killed again and again by the human. He clenched his fist, as he is sick and tired of being unable to do anything about it. Than...he had an idea. If he can send most of his soul back into the Underground, yet keep a small bit of his soul to himself, than perhaps there is a way that he can do this. And it worked...a new Sans appeared. But it did not work the first time. In fact, it took a very long time, as Geno had to constantly erase his memories, when things go very, very wrong. But than...in the last one, he finally was able to successfully pull it off, and finally stopped the kid once and for all, though Sans had to do something insane in order to pull this sort of victory off.

So...with the help of the new copy of Sans that he had made in this new reset, he was able to succeed, and with Sans and Papyrus' help, Geno finally was able to escape the Save Screen, and finally gain a normal life with them. Unfortunately...this was all wasted, and Geno did something very unexpected that costed him the very thing that he had craved for so long. He experimented on his own Determination, being warned by Sans not to do that, and during all of that, he got sent sent to a white space called the Anti-Void, sealing his fate. And it is there...that his transformation to who he would soon be later...began that day. Geno tried to call out for anyone inside of the dimension that he is in, but no one is there. And than...he began to hear voices, which drove him mad. His physical appearance began to change, and eventually...he transformed into what he would soon become later. His colors beginning to change and switch positions, his right eye, which he cannot see through, became healed, but in exchange, both of his eyes have to become nearsighted, leading for Sans to use glasses.

This than lead to the creation of Error Sans, and needless to say, he had become scared and confused at what had happened to him, and during one of his panicking moments, he had accidentally made a portal, which sends him to a version of Remnant, where he consider it as his home. But luckily...he won't be alone, as there is also someone that came with him.

He also has an Error Papyrus, and he is very friendly, even if he is a little bit...unhinged. Error Sans was a bit nervous at this version of his brother, but after some reassurance...he believed his brother, and the both of them began to live with each other, and both Error and Papyrus began a home of their own. Error's powers have enhanced beyond what they could normally, but are still not that strong compared to the others, and he knows that there is an additional power, besides being able to go to the Anti-Void and back, but he has no idea what this other power of Error is. But during an attack, Error manage to catch the attention of Union, and he was accepted to Union Academy...a place that the regretted going to, due to the amount of suffering that he had to endure inside it, and even worse, is that Papyrus had to go with him, and Papyrus had to suffer at trying to defend his younger brother all the time, due to how scared Error would be at fighting. But inspire of all the struggles, Error was at least be able to make some new friends, and so did Papyrus, who is somewhat obsessed with making new friends. But than...an incident would soon to having Error become something else. Something that is no longer considered innocent by anyone throughout the Multiverse itself.

This is the story, of how Error Sans, came to be to this very day.

5 months in the past...

"GAHHHHHH!!!!"

Error cried out in pain immensely, as his back then hit a wall from behind him. He had only been in Union for a whole 2 month, and he is already getting hurt by people for no reason at all. He than held his arm, as he looks up to see who it is that has been hurting him badly.

He looked, and saw that it was Bakugou and Yang, who smiled down at Error, along with Weiss, who is in the background and Issei, who is there standing above him, as they have the feeling of superiority inside of them, while they made Error felt inferior.

Weiss was originally the second girlfriend of Error. But the thing is, Weiss cheated on Error for Issei, and Issei is one of the people that had tormented Error for a very long time. Weiss is in the background, believing that Error does not see her, and believes that he still thinks of Weiss as Error's girlfriend, but Error knows the truth already, due to him hearing them do their business when he was passing through their dorm at night.

'That pathetic weakling should not have been with me in the first place, now would he?'

Weiss said, as she smiled sinisterly and cruelly, as she sees the sight of a tormented Error on the ground. It is such a joy to watch him struggle out of the position that he is in. And it brings her much more happiness to see that a weakling like him is getting agonized..

"Come on, is that the bad that you got loser?!"

Yang spoke out, as she smiled cruelly at Error, with Issei reeling his fist back, as he shouted out.

"Hah! I know you were weak! But I never thought this weak!!!"

Bakugou than spoke out.

"You don't even deserve to be a hero! You deserve to go to hell!"

Issei than launched his fist forward in an attempt to strike at Error, but Papyrus was able to appear, and protected Error from getting hit by Issei, before Yang looked angry and shouted out at Error's younger brother.

"Hey, get out of the way, you freak!!!"

But Papyrus does not listen, and instead of getting out of the way, he quickly grabbed Yang and Issei by the faces, and through them backwards as much as he can with all of his strength, leading to them crashing into a wall. Error looked up, as he looks very unhappy with what he had to go through, as Papyrus picked up Error, and his hands glowed, as he is able to use some green magic to quickly heal Error.

"Are you okay, brother?"

Papyrus said to his brother, as Error nodded at his younger bro.

"Yeah, I'm fine. Thank you, bro."

Error and Papyrus smiled at each other, as Papyrus settled down Error to the ground, and spoke out to Papyrus.

"You know, Sans, you can't let them do this to you. You need to find a way to fight back."

Error looks up at his younger brother, as he than spoke out to him.

"I know that, Papyrus, I know. But the thing is, I have no idea how I can, and even if I want to, the teachers would probably get me in trouble, instead of the bullies, who would do all of this to me."

Papyrus than spoke out.

"Than...be lucky that you have gotten some friends here to help you with this mess you are in, Sans."

Sans looks up at Papyrus and nodded.

"Right."

Papyrus smiled at Error, as he spoke out.

"Now, let's go to history class, we need to go there on time."

Error nodded, as they both made a portal to History Class and went through. And thankfully, they are on time, as professor Oobleck is here, and no one has entered it yet, and when Oobleck noticed Papyrus and Error, he spoke out.

"Ahh...Error and Papyrus, my too earlier-and-on-time students. It is nice to see you are here again."

Error and Papyrus nodded, as Error spoke back.

"The feeling is mutual, professor."

Oobleck smiled at Error, as Error smiled back, and than, doors opened, and the first person to come, well...

"(Gasp) Error, there you are!"

Error turned to see someone that he is really happy to see, and one of the very few people that can make him happy.

"Heya, Ruby."

Error said, as he smiled at her. Ruby smiled back, as she picked up Error and hugged him as tightly as she could, due to Error being at the height of 4'7. Error, while normally he'd be rather Haphephobic, he does not mind Ruby touching and hugging him, since she is the only few friends that he had that's very kind to him. Ruby puts Error down, as Error and Ruby go to their seats, and soon, everyone else. Oobleck was about to teach something, but realize that he forgot the equipment that he needed, and because of this, needs to excuse himself to go and find his stuff. But as Error kept on sitting and waiting for Oobleck to return.

"Why?"

Error turned around, and glared at the person that had spoken to him from behind his back.

This is Koneko Toujou. She was originally Error's first girlfriend, until she decided to go with Issei and break up with Error, because he is considered to be, too weak by her standards. And because of this, Error actually has a strong bad bone on Koneko for outright betraying his trust. And when that happened, he does whatever he could to try and avoid and not speak to Koneko Toujou, as much as he can try.

Error looks, as Koneko spoke out the question again with no emotion or expression.

"Why are you still here? Shouldn't you have left already, after what you had to go through?"

Error, however, snorted, as he spoke out.

"Why do you suddenly 'care' enough to know the reason why I am still staying, when you never gave a damn?"

Koneko simply responded back, as Koneko spoke out this response.

"Just answer the question."

Koneko stared intently at Error, who glared at Koneko, before he spoke out.

"You want an answer...well here it is."

He snapped his fingers, and than, suddenly...

BANG!!!

A large red bone erupted beneath her desk, catching Koneko off guard, as she looks at Error with a shocked expression, who simply responds back, bored.

"Screw off, and go fuck yourself for all that I care."

Error than turns his head back, as the bone began to vanish and disappear completely, as Koneko returned her original position back to her seat. And this time...an expression did appear on her face, which is an expression of...sadness. Why? Because when she was with Error, there was a strange feeling that Koneko always liked. That feeling was...warmth.

Whenever she was near Error, hugging him, kissing him, or even just walking with him, warmth would overtake her body, and it was the best feeling she had in her life. It was a feeling so great, she enjoys it. It was a feeling that she did not want to let go, no matter what it is that involved Error.

But when she decide to break up with Error and spat all of his kindness back at his face, and went with Issei...nothing. She felt nothing. No matter what she did, what she tried, nothing happened. Why is it that she cannot feel anything with Issei? Issei is supposed to be the strongest student in Union. So why is it that she cannot feel warmth again?

In all honesty...she had hoped that his behavior could be calmer, so she could talk to him and hopefully reignite their relationship again. But now, based on what he had just did, and the response that he had done to her, that hope of hers is now going away, and now, she has lost all hope that she had in trying to her her former boyfriend back.

Now all Koneko can do, is silently cry, as Error, who she had betrayed, now hates her for doing all of this to him. Clearly, Error is never going to let go of his grudge anytime soon. And Koneko knows that in her heart, it is all her fault, and she cannot take back what she had done, as Error now hates her for what she had done, and will likely never let go of this grudge that he had been brewing inside him.

Than, Oobleck came back, and spoke out to the class.

"Alright, Class, are all of you ready?"

Error, getting his notebook and pencil out from a portal to his form, nodded his head, as he gets ready for history class. Koneko does the same, as she gets out her own notebook and pencil...but she still looks at Error, who takes off his hood and pays attention to what Oobleck had to say, while Koneko can only look sad at Error, and as she looks at him, her left hand subconsciously reaches out to touch Error's hood, as she desires to be back with him again...but she looks at her hand, and stops herself, and sighs sadly, knowing that she should not pay attention to Error right now, as she class to do, and that it is very important for her. Maybe when class is over, she can have a chance to talk to him. But Error, knowing what she is planning...won't let that happen. He is not going to talk to her, and never will talk to the Nekoshou again.

After class...

Error tries to keep his head low, as he tries not to be noticeable to anyone. But the fact that there are the words, Error, all over his body, makes disappearing into the crowd difficult. But thankfully, he does not need to disappear, as a voice spoke out to the microphone system.

"Would Error please enter the Headmaster's office?"

Error, in an instant, made a portal there, and was able to go through it, as the portal closes, and he is met by the headmasters.

The Headmasters are some of the only people that treat Error fairly, and actually tried to help him with the situation that Error is in. Of course, Error also knows that they are straight-up apathetic about the situation, as they're unable to do anything about it, which is very infuriating to him.

"Hello, Mr. Error, it is nice to see you."

Ozpin said, as Error nodded and he sat down on the chair.

"Yeah, nice to see you as well. Did the council get my request?"

Error, during his time there, had made a request to the council to stop with the harsh treatment that is being given to the weak, the powerless, or to the heroes that are very low, due to the fact that, in his excuse, it would do nothing more than stall those people from going up any higher, and what they are doing is straight up bad, and is doing nothing beneficial to the academy. Ozpin nodded, though he did not look happy, as he than spoke out to Error

"They did...and unfortunately, they turned down the request."

Error sighed, as he spoke out to him.

"Mind telling me why, even though I know that the reason is going to be a petty excuse?"

Sirzechs sighed, as he pinched his nose, before he than spoke out to Error.

"The council made it the official reason being that the treatment is already necessary enough for people such as you to have, and that lessening the treatment will only make things bad for the other students that they would consider as their, favorites."

Error sighed, as he pinched his nose, and slammed his head, as he spoke out.

"Well...if it is that bad, why not just simply shit down the academy or destroy it, if it starts to make the heroes become corrupted, or even better, expel some of them? I mean, is it better than to have it leave be open for more students to become terrible heroes because they think that they are better than anyone else?"

Nezu spoke out to Error, as he spoke out.

"That's the thing. The council won't let us. If we try and shut down the academy, they will make sure that we would get fired for this action. But even worse, we would than be replaced by people that are a bit more worse than the students that you had to deal with, and that would make the environment more unfair. The best that we can do, is hope that we can get some of the students to change this ridiculous."

Error sighed, as he held his face with his hands, before he stood up, and spoke out.

"Well...I think that this is all I need to know. Thanks for giving me this talk and the info that I need."

Error began to walk away, as Ozpin spoke out.

"Good luck, Error, and hopefully, things can go the way you want it, and I pray that something will happen that will make sure the Counciler stop this madness, especially with what is happening right now."

Ozpin and the others simply looked as Error went away, as he is clearly not very happy, but Ozpin and the others can't care about this. Not now.

In combat class...

Error sighed in such an exasperated, hopeless tone, as he cannot believe that he is doing this again. At least he'll have Papyrus to help him, but even that is not encouraging, since Papyrus is a pacifist, and is not a violent person. And that is straight up bad, as Glynda is one of the few teachers, who outright does not like the fact that him and his brother are weak, and even supports this sort of thing, and often tries to get Error to fight against some of the strongest students, only for the machine to malfunction at a bad time, and choose someone else, and Glynda would grumble at the misfortune that had happened, and not being able to get Error hurt by someone. This time, though, she is successful, as she is able to get Error inside of the combat room, along with his brother, as Error and Papyrus looked at each other. Papyrus can tell that Error is scared for his life. But Papyrus pats Error on the head, as he spoke out to his brother.

"It's alright, Sans. You still have me. I'll make sure that we will get out of this one alive."

Error nodded, and turns back to the front of the door, as Glynda looks at Error in disgust and revolt for having a weak student in her classroom, before speaking out.

"For this last match, Error and Papyrus, they will be facing off against Issei, Rias, and Akeno."

Papyrus spoke out to the teacher.

"Professor Goodwitch. There is only 2 of us and 3 of them. Is it unfair to do an uneven number of people?"

Glynda looks angry, as she spoke out.

"Do not question me on this, Papyrus. For that, I send in some 2 additional teams. Bakugou and Yang!"

Papyrus was about to speak, but Error shushed him, and tells him to not make anymore sounds, as Error could hear Glynda mumble from under her breath.

"At least this will make them lose the match easier."

Error felt hurt by this, as teachers are supposed to be fair, not like this.

Rias, Akeno, Issei, Bakugou, and Yang appeared, and they all smiled menacingly at Error and Papyrus, as they spoke out.

"Now we get to put the weakling in his place!"

Rias said, as she than looks at Error, who is looking a little scared at what'll happen.

"Oh my, Error~. I always wanted to he's thou screams of agony~!"

Akeno than fired Holy Lightning at Error, who than dodged out of the way. He than fired an Error Blaster at Akeno, but Rias simply just defended it by using her defensive magic circle. Rias smirked, as she spoke out.

"Even you can't break through it. Man, you are so useless."

Yang than fired bullets from Ember Celica, as Error than began to dodge the attack as much as he can, and Papyrus used his powers to make bubble shields on himself, so that he can act as a wall.

"You will not hurt my brother!!"

Error Papyrus shouted, as he than fired red bones at the team that him and Error are fighting against. Bakugou ran up and exploded them, but than...he got hit by a wall.

Error ran forward, and launched his own bones at Issei, who was able to block his attack, and ran at him. Error teleported, and went up into the air, and fired his Error Blasters at Issei. But Issei simply boosted his power, and blasted them, overpowering the Error Blasters. Error than dodge out of the way again, as he than landed behind Papyrus, who is staring to lose his grip.

But than...unfortunately, Rias used her Power of Destruction on Papyrus, and this got rid of the shield...which gave time for Yang to charge forward and punch Paoyrus on the gut, along with Error, who is behind him and used him as a defensive wall. Error was in the air, before he landed onto a wall. Rias smirked, as she walked over to Papyrus, and Issei grabbed him by the head, and Rias spoke out.

"You have been a big throw on our side, Papyrus. You had decided us access to Error and protected him for far too long. Now...let's see what happens, when Error watches you getting mercilessly bested and beaten down by some of Union's best students.

Everyone cheered for Rias to do their thing, as Error became conscious, and saw what was about to happen, and in a moment...a form of anger erupted out of Error, as he than suddenly cried out at the one that had tormented him for this long.

"LEAVE MY BROTHER ALONE!!!"

Error shouted, before he teleported out of the ground, and tried to get Papyrus out of the hold that he is in right now, and tried to see him, but Issei punched Error into a wall, and made a large crater.

"Too bad for you, weakling!! Now you get to watch your brother die before you eyes!!!"

!!!

Something inside of Error snapped, as he than spoke out something.

"You all don't..."

Everyone looked...and saw that Error is beginning to shake. But not in fear or pain...but laughter...

"Hehehehehehehe...hahahahahahahahaha!!!!"

Error than grabbed his eyes, as he than shouted out.

"You don't even realize, you shouldn't EXIST!!!!"

Error sans then freaked out and lost his sanity, as he pulled the blue strings out from his eyes. This made everyone panic, as they were not expecting for Error to suddenly do this now. His body than began to glitch, an insane smoke formed on his face, as he than began to act on his assault against the ones that had tormented him and his brother for so long.

Issei tried to fire at the crater, hoping that this would finally knock him out, and so that they can kill his brother.

[There should be a GIF or video here. Update the app now to see it.]

And unfortunately for them, this is the last mistake that they had made, because now, Error is way beyond pissed off than before, as laughter began to be heard from the place he's blasted in.

"Ehhehehehehehehe."

Everyone turned to the direction of Error, as he began to laugh even more louder and more hysterical than ever, as he attacked with his strings and his Error Gaster Blasters.

"HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!!!!!!!!!!!!!!!!!!!!!!!"

[There should be a GIF or video here. Update the app now to see it.]

19:16-19:21

Error than began to laugh, and his laughter is unlike anyone had ever heard him do. It is extremely terrifying to even hear it, like it is a voice coming out from a broken recorder that is repeating old lines, except that the old lines are sounds of laughing.

Bakugou tried to attack Error, but he ended up getting hit by his Error Blaster, and this time...they are far more powerful than ever before. So much so that they are somewhat lethal by simply getting blasted at them.

Yang looked angry, as she shouted out.

"How dare you, Weakling!! Take this!!!"

Yang launched herself at Error. But he simply grabbed onto Yang's arm, and ripped it off.

"AAAAAAAGHHHHHH!!!!!!"

The pain...is so unbearable. She held her right arm, which became a bloody stump. Rias was shocked, as she than fired the Power of Destruction at Error along with Akeno, who had fired Holy Lightning at Error. But Error fired his Error Blaster again, and this time, the Error Blasters manage to overpower the combined attack, as Rias and Akeno were shocked at this sort of impossibility happening before them, before the both of them got hit by the blast.

Error smiled, as he then launched blue strings at Issei, who is able to get out of his shock, and jump back, and this time, he is actually panicking at what he is seeing before his eyes. Error, he has become insane right now, and there is no stopping it!

"Where did that come from??!!!"

Issei shouted, before Error appeared in front of him, an insane look now present on his face, as he than wrapped his body in the blue strings, ensnaring him. But Issei got out of the way, and tried to use his Dragon Shot, boosted to a larger strength, as Error than used his Error Blasters, and overpowered the blast of energy from Issei's Boosted Gear. Issei could not believe it, as he spoke out.

"That is impossible!! How can a weakling like you become like this??!!!"

Than...a voice behind him spoke out.

"May-Maybe because...this-is weakling...has hid-hidden power...th-that you'll nev-ever have."

Than...Issei became entangled by the Blue strings, and it is very painful for Issei. He was than turned around, as he saw Error walking up to him, a crazed look now present on his face, as he spoke out to Issei.

"Say good-gooodbye."

Than...a female voice shouted out at Error.

"Issei!! Error, let go of him now, or else Papyrus dies!!!"

Rias shouted, as she gets ready to destroy Error's brother. But Error spoke out.

"I have-ave a-a much mo-more bet-better idea-a."

Error clenched his fist, as Issei spoke out.

"What the, what are you doing, you weakling?!"

Error smiled, as he spoke out.

"I kn-know of how power-powerful that you can-can be...Issei...as well as the f-fact that you can boo-boost to the lim-limit of being ab-able to destroy-troy anything, and this includes building."

Suddenly, Issei's Balance Breaker activated, as Error spoke out.

"S-So why n—no-not have y-you destroy it, BY YOUR VERY OWN HAND???!!!!"

Than, Issei's Boosted Gear than began to boost all on its own, as Rias spoke out.

"What are you doing?!!"

Glynda, now frightened for what Error is going to do, speaks out.

"Mr. Error, please, stop this!! I'll punish them for trying to kill your brother!!! Please, put Issei down!!"

But Error simply smiled, as he spoke out.

"Y-You had man-many chance-ances to put a stop to this, Goodwitch. You had-ad a chance to final-finally end all of this and make this cruel-uelty stop! But instead-stead...you let it keep happening, and eve-even wider, you went along with them. So now I suppose...I am done being a hero. So instead of using my power-ower, to fight fight the lives of people-eople..."

Issei than reached the limit of his power, and spoke out.

"Wait, stop!! What are you going to make me do?!"

But Error did not hear Issei, as he continued...

"I-I am go-going to u-use my pow-power...TO DESTROY LIVES."

Issei than reeled his fist back, as Issei stop.

"NO, STOP!! DON'T DESTROY THE ACADEMY!!! I'LL STOP HURTING YOU AND YOUR BROTHER AGAIN, PLEASE!!!"

But Error's response...

"Too la-ate."

Than, Issei punched the ground with all of his might, as Error smiled, as the whole building began to shake. Luckily, Error's friends got out of here, and Error, with the last of his strength, blast Rias and Akeno, before grabbing his brother, and dragging them both into the Anti-Void, as Union Academy...began to collapse down...and be destroyed.

What was once Union Academy...is now just a pile of rubble.