Gentale

created by Vexperial

Gentale is an Undertale AU made by youtuber GenTem. As GenTem’s following expanded, so too did Gentale, with a plethora of “sub-AUs” being created by the members of their community, all following the same basic premise.

After being driven Underground, Sans and Papyrus lived on the streets for several years, scrounging for scrap and spare change just to survive. It wasn’t until Sans met Asgore, who was friends with his mother, Captain Arial, and his father, Doctor W.D. Gaster, that things began to look up.

In addition to being taken in by his father and finally having a home and a steady supply of food to live on, Sans and Papyrus also spent a lot of time with the royal family, becoming close friends with both Asriel and Chara and being considered surrogate children by the King and Queen.

Things would not stay this way forever, and much like the events of many other versions of them, Chara and Asriel enacted a plan to free the monsters, which failed. From that point onward, events began to spiral down a dark path. Asgore declared war on humanity and began to kill the children who would fall into the Underground, believing it to be the only option and slowly self-destructing as he fell further and further into despair. Toriel left Asgore and sealed herself away in the Ruins, abandoning the kingdom for years to come.

When Sans saw how Asgore was falling apart, he agreed to allow his father to perform a procedure on him to enhance his abilities to turn him into what could be considered a living anti-human weapon, as he took on the burden of killing both the Patience and the Justice souls to spare his surrogate father the pain of doing so himself. As the years passed, Sans spiralled further and further into his own depression, which was only exacerbated when Gaster attempted to kill him, forcing Sans to push him into the Core in self-defense.

It was a fateful day when Sans decided to pay a visit to the grave of Asriel and Chara, as it had been several years since the last time that he had visited, as full of shame and grief as he was. Nobody could have expected what had happened during that visit, but when Sans left, he was accompanied by the Phantom of Chara, who through unknown means had awakened and found their spirit bound to Sans.

Sans’s personality and abilities have drastically changed due to Chara’s presence, and more things will continue to change as time passes and the story continues onwards.

## Backstory

### Pre-Underground

In the past, humanity and monsterkind lived in peace together on the surface. Just like any civilization with cultural differences they had their conflicts, but there were never any major issues that couldn’t be resolved quickly. However, as time passed and the population of monsters began to grow, with their territories growing with them, some members of humanity began to grow concerned with their presence.

While the monsters’ ability to absorb human souls to gain more power was relatively well-known, it was generally not thought of much, as monsters were a friendly minority who had done little to arouse such suspicion. Yet the voices of those who were wary of monsters steadily grew louder and louder, and more voices joined their cause with each passing day.

In what seemed like the blink of an eye, war erupted. Monsters found themselves being assaulted on all sides, the sheer overwhelming numbers of the human armies managing to push back the smaller number of skilled fighters that fought against them. Among these monsters was Captain Arial, the single mother of Sans and Papyrus who had placed herself on the frontlines, determined to protect her children from the human onslaught.

As time passed and humanity began to score victory after victory, the monsters were forced to fall back and were pushed further and further into the heart of their territory until they found themselves fleeing to take refuge beneath the massive mountain that dominated the landscape of their lands. While the majority of monsterkind managed to escape, many members of the Royal Guard remained behind to fight off the humans in order to buy their people more time. Among the many monsters who perished while holding the line was Arial, leaving Sans and Papyrus alone, as they had never met their father. While many monsters were lost with their dust being said to be in such huge quantities that it blocked out the sky, there was still hope. The royal family, as well as the other surviving monsters, managed to make it beneath the mountain, where they would be able to be safe. However, in a cruel twist of fate, the few humans capable of using magic turned their refuge into their prison, locking them away forever.

### Underground, Pre-Plan

With Arial’s death, Sans found himself and Papyrus homeless and alone, forced to live on the streets and scrounge for food and money to get by. Sans found himself as the primary caretaker of both himself and Papyrus and spent almost all of his free time tracking down any leads for the location and identity of his father, but to no avail. It wasn’t until a year into his homelessness that he met King Asgore after being caught red-handed stealing from a shop that things began to look up.

Asgore had realized the moment that he met Sans who he was, and felt determined to help him in any way that he could when he realized that the skeleton and his brother were homeless. He had thought that Sans had perished alongside Arial, and the knowledge that the two children had been living on the streets this whole time fueled the self-hatred in Asgore, so he took the two children to the Royal Scientist, W.D. Gaster, who he had known to be their father.

While Gaster agreed to take them in, he never truly had the same parental nature that Arial had, so while he certainly took care of his children, he was unable to provide them with the emotional connection that they needed. Thankfully this problem was partially mitigated thanks to the Dreemurr family. Asgore regularly brought the skeleton brothers into his home and took care of them, and for all intents and purposes, they grew up alongside Asgore and Toriel’s children, Asriel and Chara.

The four of them were as close as friends could be, practically inseparable. Sans himself had a locket that matched Asriel and Chara’s own lockets, and over the course of their time together Sans and Chara had even begun to develop crushes on each other. One day when the four of them were spending time together, Sans had been telling Asriel and Papyrus stories about the Surface, particularly what he remembered of the stars as he had always loved them, and neither Asriel nor Papyrus were old enough to remember any of the surface.

Seeing how much Sans missed the stars, Chara had begun to hatch a plan. A plan to give their soul to Asriel, who would cross the barrier and gather the souls needed to free monsterkind. However, this plan was doomed to fail, and in its aftermath left a grieving Underground that had lost its hope.

### Aftermath of The Plan

After the deaths of both Chara and Asriel, the Underground was devastated, none more so than the remaining members of the royal family and Sans. The former two had just lost their children, while Sans himself had lost his best friends. Despite the fact that their deaths were practically public knowledge, Gaster and Sans had decided to keep the truth of what had happened from Papyrus. They never told him the truth of what happened to Asriel and Chara, and combined with the fact that they had never returned to the Dreemurr household, Papyrus’s memories of the royal family had begun to fade away.

Before the deaths of Chara and Asriel, Sans and Papyrus had spent a lot of time with the Dreemurrs, frequently spending the night and growing to consider the royal family to be their family. With the death of his children however, the skeleton brothers had returned to living with Gaster full-time, and with the sudden lack of support from the two young monsters who Asgore and Toriel had considered to be surrogate children, Asgore’s mental health had begun to deteriorate. In a moment of desperation fueled by his own mental state and the lost hope that he had observed from the Underground as a whole, Asgore declared war against humanity, sentencing any human to fall into the Underground to death.

### The First Four Fallen Children

The first child to fall into the Underground after its anti-human policies had been established was the soul of Perseverance who had made their way through the Underground. They had been mostly pacifistic on their trek across the Underground, but while passing through Snowdin they began to be overwhelmed by one of the Dog Guards, the brother of Dogaressa, and in a moment of terrified self defense, they struck down the monster in a single blow.

Traumatized, Perseverance continued their journey through the Underground as a total pacifist, refusing to harm a single living soul as they made their way to Asgore. When they finally arrived in New Home, standing before Asgore, they were brutally struck down with a single blow of his trident, and the first soul was claimed for monsterkind.

It was after witnessing this heartless display of cold brutality that Toriel finally drew a line, gathering her things leaving Asgore and the rest of the Underground, making her home in the ruins and intent on saving any more humans that fall.

The next human to fall possessed a bright green soul of Kindness. She made her way through the Underground as a firm pacifist, unable to even consider the idea of hurting another person. She made friends wherever she went, but this was not enough to save her as she too eventually stood before Asgore. And so, just like Perseverance before her, she too was slain by Asgore, claiming the second human soul.

Following Kindness was Integrity, who stuck to their principles and trekked through the Underground, convincing monsters to spare them and fleeing when needed, as they refused to harm another person. While they did not make as many friends as Kindness did with her genuine warmth and empathy, they did leave a lasting impression on all of the monsters that they interacted with. All of these connections were for naught however, and the trident claimed a third soul.

The last soul to fall for quite some time was Bravery, who unlike the other souls to fall so far, accidentally killed a monster before even leaving the Ruins. It was in a moment of panicked self-defense that he lashed out at an attacking Froggit, only to be shocked when the monster crumbled to dust with a single well-placed punch. It was a short time after this that Toriel came across the child, taking him back to her home and explaining how fragile monsters were, after which he swore not to let his instincts hurt any more monsters.

Just like all of the children before him, Bravery too, left the Ruins and began making his way towards Asgore. The boy was steadfast and brash, rushing headfirst into challenges without thinking things through and endearing many inhabitants of the Underground to him in the process. After so many peaceful humans, some monsters were beginning to grow disillusioned with the idea of killing any more of them, but Asgore stood firm. He had already sworn to do this, and no matter how much he wanted to stop he had already come too far to let the deaths go to waste. A fourth soul, claimed by the trident.

It was shortly after the death of his friends that Sans began to visit the grave of Asriel and Chara in the ruins regularly, paying his respects once a week. Initially he would talk to the grave whenever he visited, talking about how his day went, how Papyrus was doing, what kinds of inventions Gaster was making, and what was going on in the Underground. Even after Toriel moved into the Ruins and sealed it off he continued his visits, simply teleporting to the grave in order to pay his respects on a weekly basis.

However, as time passed, he became less and less talkative until eventually he would just sit in solemn silence, unable to muster up the energy to even speak as he mourned his friends. What could he have done better? How could he have saved them? Why did they have to die? These questions haunted Sans’s mind for years on end, and little by little, his HOPE began to deplete.

### Patience and the Procedure

It was after the death of the Bravery soul that Gaster seemed to realize how much of a toll the entire situation was taking on Asgore and his soul. With each death that occurred, Asgore spiralled deeper and deeper into his depression, to the point where his soul was slowly destroying itself. While Gaster had wanted to destroy humanity, he was not evil, and watching the impact that the death of each subsequent child had on his dear friend made Gaster start looking into alternative solutions. After all, while he didn’t want to kill any more children he still wanted freedom for all of Monsterkind.

At this point in time, the most recent human to fall was a young girl whose name matched her soul type, which was Patience. Sans had been the first monster to meet Patience after she left the Ruins, intent on making her way home back to her family. Initially, Sans had thought that she would be just like the humans that he had seen on the surface, simply a murderer who would kill monsters on sight, but over time he grew to understand that not all humans were this way. It was through Patience’s kind, gentle attitude that she managed to get past Sans’s walls, and they became close friends.

The solution that Gaster settled upon was to enlist the assistance of his son, Sans. It was nearly a week into the friendship between Sans and Patience that Gaster approached Sans about the procedure. He was in shock, unable to believe that he was being asked this, but when it was clearly laid out that Asgore was quite literally killing himself over the situation, he felt that he had no other choice than to agree. Sans himself was very close with Asgore, even viewing him as just as much, if not even more of a father to him than Gaster was, so all it took to secure Sans’s agreement to help was an explanation of the kind of toll that the killing was taking on Asgore.

Gaster had devised a procedure some time ago that he put himself through in order to enhance his abilities, so it was a simple matter to adjust the procedure to be performed on Sans instead. The procedure was torturous, and the only reason Sans was able to survive it was because his stats were much higher at that age. The main component of the procedure involved slowly carving holes directly through each of Sans’s palms, but by the end of it the all-around improvement that Sans showed was irrefutable.

His already amazing agility and thought processes had reached much greater levels than before, as had his already impressive magical might. With the completion of this procedure, Gaster had managed to create the anti-human weapon that he desired to keep Asgore from needing to kill anymore. With the procedure complete, Sans set out to complete his given duty, and killed Patience before she could react, claiming the fifth soul for monsterkind.

Even if Sans and Patience weren’t such close friends this would have affected Sans deeply, but with their close relationship in mind Sans was traumatized on a level that nothing else had even come close to. He became cold and closed off to everybody, pushing away friends and family alike as he spiralled down into a deeply depressed mental state. He stopped visiting Asriel and Chara’s gravesite, believing himself to be a horrible person who they would have been ashamed to know. Regardless of the necessity of what he had done, Sans simply could not bring himself to look past it.

### Justice

The next human to fall was named Justin, and he had a soul of Justice. He was the older brother of Patience and was in his late teens, and he had made his way up to Mt. Ebott in order to find his younger sister several months after her disappearance. He was deeply troubled by her disappearance and with the lack of progress that the authorities had in finding her, he stole his father’s gun for protection and went to find her himself.

After falling, Justin made his way through the Ruins as a force of nature. He killed every monster that attacked him out of a combination of fear, self-defense, and worry over the fate of his sister. It wasn’t until he met Toriel at the end of the Ruins that he realized how horrific his actions were, but he decided to push his feelings over the matter until after he found his sister. He did not stay with Toriel long, barely even staying long enough to rest for a single night before heading through the door to get to the rest of the Underground. When Sans saw Justin leaving the Ruins, the only thing that kept him from killing the boy on sight was his trauma over killing Patience, as he noticed immediately how similar their appearances were to each other.

As Justin made his way through the Underground, he began to piece together what had happened to his sister. While individually they did not help much, with every mention of Patience that he heard from the monsters of Snowdin, he began to realize that all signs were pointing towards the fact that his sister had died. And Sans had something to do with it.

Justin found himself filled with rage, and he made his way towards where he knew Sans would be, ignoring everything else in his way with a single-minded urge to avenge his sister. When he finally found Sans he was speaking with Undyne, and without a moment’s hesitation he pulled out his gun and began to fire in their direction. Sans managed to avoid being hit but Undyne wasn’t so lucky, taking a shot directly to her eye before Sans had a chance to get her to safety.

Once he was able to make sure that Undyne was safe, Sans confronted Justin, using a combination of his agility and his own combat experience, which compared to Justin’s lack of experience with the weapon was a huge difference. After a quick fight, Sans managed to kill Justin with a bone-spike to the heart, killing him instantly and claiming the sixth soul for monsterkind. When he took the soul to Asgore, the king was horrified by what his surrogate son found himself pushed into doing. While Asgore had not dealt with his own actions well, he found himself more depressed than ever at the realization that what he believed to be his own lack of willpower had seemed to force the skeleton who he viewed as his own son into doing.

With this realization, Asgore took the full blame for the death of the souls, and found himself once more filled with the determination to not just free his people, but now also to save Sans from himself.

### Gaster’s Fall

After the death of Justin, quite a bit of time passed without a single human falling. Whereas before a human would fall every 6 months to 2 years on average, nearly 7 years had passed without another human. It was in this period of time that Gaster began to grow paranoid. Monsterkind was so close to freedom, they only needed one more soul before they would finally be free to break the barrier and return to the surface. And yet, with each passing month Gaster’s anxieties grew more and more intense. ‘What if the hole to the Underground was sealed? What if no humans fell ever again? What if we remain sealed here forever?’ As these thoughts raced through his mind over and over again, Gaster slowly began to succumb to his madness.

One day, Gaster’s madness finally overwhelmed him and he came to a decision. Gaster told his apprentice, Alphys, to let Sans know that he had some important information to share, and to meet him by the Core, a project that Gaster had completed a short time into their imprisonment. Gaster intended to tell Sans that he was losing his mind, and was planning to tell Sans his farewell message, as well as leaving him his life’s work so that Sans could keep working to make the Underground a better place for all monsterkind.

However, as he stood staring out at his creation, those plans crumbled to dust, leaving behind only the intent to kill. As Sans approached, he began to notice something strange about Gaster’s body language, but he couldn’t tell what it was. The scientist was twitching, scratching at his arms, and seemed to be very on-edge, and it filled Sans with worry. Regardless of how he felt about Gaster, it didn’t change the fact that he was his father, so Sans approached to ask what was wrong.

The answer to Sans’s question came in the form of a swift attack that was barely dodged, and he finally noticed the gleam of madness in the eyes of the Royal Scientist. Caught off guard, it was only a matter of seconds until Gaster destroyed Sans’s right eye, drastically impairing both his magic and his vision in the process. The state of a skeleton’s eyes has a direct impact on the mental and emotional well-being of the skeleton in question, and they often serve as a way to not only convey emotions, but also to stabilize them.

With one of his eyes destroyed, Sans found that both his emotions and his ability to focus were rapidly deteriorating, as as time passed he began to lose ground against Gaster. Gaster was constantly attacking, aiming to destroy Sans’s other eye as well and leave him completely disabled, so in a last-ditch effort Sans went on the offensive, managing to push Gaster away from him, and directly into the Core, reducing him to nothing.

Several hours passed as Sans sat in silence, slowly reigning his magic back under control and he gathered his thoughts, tending to his destroyed eye as he did so. What was he going to tell Papyrus, that he killed their father? With a soul-deep exhaustion, Sans forced himself to his feet and began the trek home. When he arrived home, Sans struggled to find the words to say when confronted with his brother, only for Papyrus to show no recognition at all about Gaster. Confused and alarmed, Sans left without a second word, talking to Alphys next, but she didn’t know who Gaster was either.

Sans then went to Asgore as well, who once more showed no signs of recognition. Every person who Sans talked to didn’t seem to remember anything about him, or even that he existed in the first place. All traces of evidence, be they notes, pictures, or personal belongings, seemed to vanish into thin air. While trying to figure out what was going on, Sans realized that he too was beginning to forget, so in a moment of panic he sketched a picture of Gaster, Papyrus, and himself, locking it away inside of a drawer in his personal lab, labelled “Don’t Forget.”

Over the years, Sans clung desperately to his memory of Gaster, looking at the drawing every day in order to keep it from leaving his mind.

### The Miracle

Several years pass with Sans steadily spiralling into a darker and darker mental state. Not only has he lost so many of the people who he loves, but after the destruction of his eye he has found himself having a harder and harder time coping with his negative emotions, and he is worried that eventually the emotions may become too much and he will just end up numb to it altogether.

He begins to reminisce, remembering the good time he had as a child alongside Asriel and Chara, back when things still made sense. He realizes that it has been years since he has visited their grave, and decides to once more pay a visit to pay his respects and catch them up on what has happened since the last time, hoping that actually having a way to vent his innermost thoughts would help him to get them back under control.

As he sat at the grave speaking his mind, something odd was happening. Something had changed since the last time he visited the grave and whatever it was was causing something to shift in his very soul. Sans had no clue what was happening, only that it felt as though his soul was stretching, being strained to its limits, only for a sudden feeling of relief to wash over him as he felt as though he was finally able to relax.

For the first time in what felt like years, Sans’s ever-present smile was genuine, and as he opened his eyes, he was met with a pair of red eyes staring back at him. He couldn’t believe it, Sans knew that he had to be hallucinating. Maybe that feeling in his soul was him dying, and these were his last moments of peaceful delusion before he crumbled to dust? But no, several long seconds of silence passed and Sans realized that what he was seeing was true.

His deceased friend Chara was once more before him.

As it turns out, whatever had changed about Sans since his last visit had done something to his soul, allowing Chara’s lingering determination to latch onto it, awakening them from death and making Sans the most determined person in the Underground. Not only that, but with the sudden addition of Chara to his soul, Sans’s mental state seemed to begin to stabilize, even in spite of his missing eye.

Everything had changed in what had seemed like an instant, and all at once Sans felt confident about something. In spite of all of the insecurity and uncertainty that he had been through, for once he felt certain about one thing: Everything was going to be okay.

## Characters

While many aspects of most of the characters are the same as their "Classic" counterparts, there are a few major exceptions to this, with these characters serving as the focal points for the AU.

### Sans

Sans serves as one of the primary focuses of the AU, as most, if not all of the changes that have occured are in some way related to him. Born on the surface, Sans was forced to live on the streets of the Underground with his younger brother during some of the earliest years of his life. Eventually meeting and befriending Asriel and Chara, Sans's life certainly had its ups and downs, but at the time of Frisk's fall, it seems to have balanced itself out, and he is enjoying life alongside his brother, Papyrus and his partner, Chara.

### Chara

Chara fell into the Underground at a young age and was adopted by the Royal family in the early years of their imprisonment in the Underground. Chara and her adoptive brother Asriel were close friends with the skeleton brothers, and they even had a crush on Sans. It was Sans's wistful recollection of what little he remembered about the stars that drove Chara into coming up with the plan that led to their death. With Chara's revival as a Phantom, Chara is truly enjoying life alongside Sans, despite the drastic changes that had occured after their death.

### Alphys

Alphys was once the apprentice of Gaster until his disappearance, after which the timeline corrected itself to make her the Royal Scientist. While Gaster was still around she and Sans worked together, becoming close friends and even having a short romantic relationship together. While they are no longer together, they are still good friends. Due to her position and skills as a scientist, she has become aware of Resets by observing the data from other timelines. She has a crush on Undyne.

### Frisk

Frisk is the 8th human to fall into the Underground. Much of their story isn't known, and they really don't like talking about it either.

### Papyrus

Papyrus is the younger brother of Sans, and while they lived on the streets Sans raised him. He was a part of the friend group that Sans had with Asriel and Chara, though over time all memory of them has slipped from his mind. He is a member of the Royal Guard, and he has a very close relationship with his brother.

### Asgore

Asgore is the king of the Underground, and is one of Sans's parental figures due to practically raising him. Over the years as the human children fell into the Underground and he was forced to kill them, his soul began to self-destruct from his intense grief and self-hatred.

### Toriel

Toriel is Asgore's ex-wife, and is the former Queen of the Monsters. She lives in the Ruins and shares knock-knock jokes through the sealed door with Sans, who she is aware of the identity of and views as one of her children.

### Undyne

Undyne is the Captain of the Royal Guard. She views Asgore as a father and Sans as a brother, thanks in large part to Sans saving her life after she lost her eye to Justin, the Justice soul. She has a crush on Alphys.

### W.D. Gaster

The father of Sans and Papyrus who spiralled into madness, eventually attacking Sans and destroying his eye. Sans pushed him into the Core in self-defense, shattering him across space and time.

## Trivia

* Frisk falls a few years after the event that leads to Chara’s return.
* Flowey's story is the same. He was revived after Gaster’s disappeared, since Alphys was assigned royal scientist by the timeline trying to correct itself.
	+ This means that the length of time between Gaster disappearing and Sans reviving Chara was actually a loop. Flowey would kill everyone, reset, he would make the timelines as he wanted just to reset. But none of the monsters really knew about it. Not even Sans, or Alphys noticed the issues with the timeline.
	+ One of the pacifist timelines flowey had made just happened to last long enough that Sans visited Chara, revived them, and became the most determined being on the underground. Sans slowly started remembering the timelines. Everything flowey said. He knew now that Flowey was Asriel, because of all the taunting he did in previous timelines. Chara also shared Sans memories, so they knew what happened too, in due time.
* Monster Kid dislikes puns, much like Frisk.
* Monster Kid now trips over way less, with the help of Undyne.
* Flowey doesn’t care about Frisk at all. Even after being “saved” by them.
* MK dislikes golden flowers.
* MK doesn’t know about Asriel or Chara at all.
* Hate can use magic with any human host.
* Snowdrake will never be a good comedian.