SKELESIS AU

The Skelesis (Stylized as SKELESIS) AU is a spinoff AU where Shae raises Papyrus instead of Sans. The AU takes a lot of inspiration from the 2012 incarnation of the Teenage Mutant Ninja Turtles.

Story
Gaster brings a 1-Year-Old Papyrus to work. The two go to the CORE for maintenance, but as in SHAETALE, Gaster is shoved into the CORE by Jerry. However, right before falling to his demise, uses his teleporting abilities to save Papyrus. Papyrus is teleported to the surface, a world populated by humans, while the monsters lived underground. A young girl, Shae, finds him in the forest, and brings him home. She takes care of him in secret.

When she turned 18, she and a young Papyrus moved out to live in an urban home. About 10 years later, their home gets vandalized and threatened, two of their new friends, Wyatt and Emily, invite them to come live with them in a rural mansion the former had bought.

Weeks later, Shae meets Gaster, Ariel, and Sans being harassed by a human. She helps them shoo off the human and defuse the situation. Thankful, the trio introduce themselves and quickly befriend Shae. Shae, noticing that Ariel resembles Papyrus, invites them to visit, as she suspects the duo may be his biological parents.

Trivia

 * Papyrus is much younger than all his other counterparts, being 16.
 * He is technically in his canon age range, though he was 16-17 in 2015, when UNDERTALE released. (Assuming the game takes place in 2015)
 * Shae was never abused in this AU.
 * Despite Karen not being abusive in this AU, she and Daniel still divorce, as the latter comes out gay.
 * The two are still on really good terms and Karen doesn't mind Daniel's newfound sexuality.
 * Papyrus sees Shae as his mother rather than his older sister.
 * Humans are much more intolerant towards monsters in this AU, thus forcing monsters to avoid humans in order to avoid conflict or even being killed.