Okay, so my creator just had this AU in their head and they want to share this with you so here meet:
SANSCELIA (If Sans Has a mother)
(Sanscelia's magic ability was telekinesis. And She was able to break the reset button when confronting a human with a determined soul and a desire to pursue the genocide playthrough. With her strong determination backing her up, she was able to reset everything without the human getting involved. Thus, the humans who were killed during this route remained dead and would not be revived. Sanscelia's abilities made her the second powerful being after Chara to have this power in the Underground)
Before the battle between monsters and humans, Sanscelia was a human before, and she's the part of the wizard, she was being called by everyone that she is soft hearted and gentle wizard...
But everything went worse than she expected. A thief who stole the magic spell book, wanting to have magic of their own, Sanscelia was trying to take the thief down using her magic, but it didn't work. In fact, Sanscelia doesn't have enough powers to stop that thief.
And unexpectedly, rumors spread fast, saying that Sanscelia was the one who stole the magic spell book. In fact, the thief had given false information to Sanscelia, taking the blame off of themselves and onto her.
Frustrating the wizards, they punished Sanscelia by making her pay for something she didn't do and for stealing the Magic spell book, even though it was neither her fault nor the one who stole it. She wanted to explain everything but they refused to listen, calling her a liar instead
From now on, the wizards placed a curse upon Sanscelia, turning her into a monster, causing her to lose her skin and hair...She was now turning into a skeleton.
As a result of her punishment, Sanscelia was terrified of what had happened to her. She didn't know what to do to reverse the spell...
She wanted to explain to everyone that she wasn't the one who stole the Magic spell book, but what everyone saw was what she had turned into, they started laughing and saying "that's what happens if you commit a crime." The embarrassment and hurt Sanscelia felt were too much for her to handle, and she couldn't help but cry.
She hid herself in the woods, hoping that no one would find her. She kept crying and crying, having lost all hope of resolving the mess created by the false information that the thief had spread to everyone, including the wizards.
Apparently, someone heard the cries and followed where they came from. Sanscelia wasn't expecting this: a tall skeleton man handed her a tissue to wipe away her tears. And She thanked him
He introduced himself as Wingdings Gaster, the Royal Scientist of monsters. Sanscelia also introduced herself to him, and she explained that she was an "Ex Wizard" of humans, and that they had punished her for stealing a Magic spell book even though she hadn't committed the crime
Gaster couldn't help but feel empathy for Sanscelia's backstory. He felt sorry for her after what happened and the curse the wizards had placed on her
Knowing that Sanscelia was forbidden to stay at her house or the village, Gaster suggested that she could stay at his place where it would be warm and comfortable for her
As the Royal Scientist of Monsters, Gaster wanted to test Sanscelia's condition after she had turned into a skeleton. However, he didn't expect this: although she had become a skeleton, but her human organs were still inside her body
Sanscelia felt puzzled by this discovery. A human organ still inside her body? She was surprised by this unexpected discovery
One day, the war broke out between humans and monsters. Gaster protected Sanscelia from the fighting, as she was too weak to fight alongside the humans, having been a human herself not long ago
After a long battle, the humans were victorious, and they sealed the monsters underground with a magic spell. Sanscelia was also sealed there, along with the other monsters, when the spell was cast
Since Sanscelia was now known as part of the monsters, having been sealed with them underground, she couldn't help but feel upset. As she had been a wizard before, she could no longer feel the magic she once wielded, cursed as she was.
From now on, Sanscelia was now a monster, a skeleton lady with human organs inside her, allowing her to live longer than humans
As many years passed, Sanscelia became a popular figure among the monsters, being now considered the underworld's first superstar. She was known for her singing, dancing, and pun-making skills
This popularity arose happened after the separation between Toriel and Asgore, the queen and king of the monsters, as well as the loss of their children
As well as her popularity, Wingding Gaster and Sanscelia fell in love and decided to wedded
Even though Sanscelia had become a skeleton, she still had human organs inside her body that allowed her to bear children and become pregnant
Nine months passed, and her son was finally born. She named him Sans after her own name
Her son was also a skeleton, lacking human organs inside his body
However, when Sanscelia gave birth, her son was unresponsive
Sanscelia was in a state of panic due to her son being unresponsive, as was Gaster
Gaster ran tests and examined their son to find out the reason for his unresponsive state, yet he was shocked to discover that the boy had no soul
Gaster tried to find a way to create a new soul for their son, but he found out that there is no way to create a new soul
At this point, Sanscelia decided to sacrifice herself by giving her soul to her unresponsive son for the sake of creating a new soul. Despite Gaster's best efforts, he was unable to create a new soul, as he understood there was no use. Hence, Sanscelia, despite her hesitation, was determined to sacrifice herself, and decided to give her soul to her unresponsive son
Now that Sanscelia was willingly giving her soul to her son, Gaster managed to capture her soul to transfer it to their child. However, despite everything working as intended, Gaster still couldn't keep himself from feeling profound sadness upon witnessing the death of his one and only love
Everyone in the underground heard the tragic news that Sanscelia had passed. They all felt a great sense of sadness and grief over her sudden loss, including the Ex Queen of the underground. They all understood that she had sacrificed herself to grant life to her child.
And as time went on, the story of Sanscelia's life and eventual death was forgotten by almost everyone in the underground...
(If you have questions when you confuse about this story, just ask and I will answer it directly)