Hello everyone. Welcome to my first fanfiction! I have to say that this story was inspired by a number of theories and works by this awesome fandom! This comic in particular here was what inspired me to write this story in the first place: post/132252432497/instead-of-finishing-the-last-two-days-of-inktober

Feel free to critique and I hope whether you're a pacifist or a sinner that you enjoy and stay Determined!

The Last Soul to SAVE

An Undertale Fanfiction

Prologue

It had been seven years since monster kind had been freed from the underground. It wasn't a smooth transition to say the least. Those early days from coming out from under Mt. Ebott had caused quite a stir from the human race. Less a knee-jerk reaction of fear of the monsters, but rather a realization that the goverment on the surface had a lot to answer for. It had been a few centuries since the barrier to the monster world had been created and the human race could no longer wield magic and had all but forgotten about the very existence of monsters. Or at least, the goverment did a very good job of keeping the knowledge of their existence under wraps. On the very day the monsters returned, the human conspiracy theorists practically had a field day. Especially considering the fact that from the collective group of monsters that had first dared to reveal themselves, a small human child was the one that led them. The one that the monsters owed their freedom to.

Frisk was a twelve year old human girl at the time, who had fallen down the mountain's deep crevice for reasons that were a secret to everyone but herself. A person of few words, she ventured through the treacherous yet quirky underground in hopes of returning home, ultimately for reasons she herself could not quite comprehend, since she vaguely remembered about not being happy with life on the surface.

But after all the hardships she endured, through a disorienting flurry of saving and resets, two powers that she had no idea how she came to wield, she finally met the sun again with her six closest companions. The family she chose. Toriel, Sans, Papyrus, Undyne, Alphys and Asgore.

As the human ambassador for the underground, she reassured the first humans they faced that her friends came in peace, and that she wasn't their prisoner, which was first assumed the moment they laid eyes on the small girl. After the first few strained days of easing the monsters into life on the surface, she was taken more seriously as an ambassador. She probably had spoken more than she had in her whole life with all the televised speeches she made on behalf on the monster race. She became famous. A role model for humans, a hero of monster kind. Her life was changed forever.

Seven years passed and she was now a young woman. After completing her education and attending the finest college the surface had to offer, she travelled the world, strengthening the bonds between the human and monster races as her role as ambassador. After a while, she returned to the welcoming arms of her village which was run by her adoptive mother and father, Toriel and Asgore, and located on the outskirts of the Capital City and within view of Mt. Ebott. Monsters had the freedom to travel and live wherever they wanted, but a small few decided to set up a close congregation an hour's travel away from the Mountain, since there was still a few monsters that chose of their own will to stay in the underground for whatever reason, so the village was set up closely for whenever the underground dwellers desired to visit or even move out. The village was dubbed 'Monster Village' by Asgore, who was notoriously uncreative with names. Toriel and Asgore resumed to rule together, their relationship slowly but surely mending over the years. However, despite how happy everyone was, Frisk always had that looming reminder in the back of her mind, especially everytime she saw Toriel or Asgore.

The reminder of the one who she couldn't save. The deceased son of Toriel and Asgore.

Asriel.

The truth was that Frisk wasn't the one who destroyed the barrier, but rather Asriel. With the power of all the souls in the underground, he was able to set everyone free, but nobody knew this but Frisk herself. Asriel was technically soulless, neither alive or dead, so he didn't have the free will to leave the underground and was doomed to an eternal purgatory in the ruins. How could Frisk tell anyone? The dead son of the King and Queen had been transformed into a sentient, sociopathic flower for all those years and had somehow breifly come back to life with the power of all the souls of the underground? It was impossible to believe, even if the guilt tore her apart and she wanted desperately to tell someone, since she felt like she was almost living a lie. Though in a way, it would be cruel to even mention, considering the hurt it would bring to Toriel and Asgore. After all, the death of your own child is a wound that will never fully heal, and truthfully, half of it was what broke them apart from each other, the other half being Asgore's desire for vengeance.

But sometimes, when Frisk looked upon Mt. Ebott from Monster Village where she and her closest companions lived, she wondered... could she... would she?... ever be able to save Asriel? After all the resets she'd endured and all the times she had to save, she thought there had to be a way. If there was one thing she learned from her journey, it was that there was always a way. Even if she vowed never to reset again after all this time. She couldn't bear the thought of it, after growing up and experiencing the world and making it a better place. Not to mention the true love she found after all this time in one of her dearest friends, Everything she worked for was precious to her and she couldn't bear to go back to being twelve years old and doing it all again. There had to be a way to save Asriel without resetting.

The hope that she could one day save Asriel filled Frisk with Determination.