Good Sister

The Good Sister AU is a sister AU to the Bad Brother AU (and to a technical extention a variation of SHAETALE), where Shae falls into the underground and saves Papyrus from his abusive brother Sans.

Notable Characters
GS!Shae

GS!Papyrus

GS!Sans

GS!Gaster

GS!Ariel

Plot / History
Shae falls into the underground. Everything is normal until she gets into Snowdin. She meets a rude, pissy skeleton named Sans. She doesn't like his attitude and is suspicious of it, as if he's doing something awful.

She then meets Papyrus, a shy skeleton who's very quiet and shaky. She quickly realizes that Sans is abusive towards him. The two quickly bond over the fact they're both abuse victims. Ever since she met him, she does everything she can to get him away from Sans.

At one point, Shae suffers a burn injury to protect Papyrus from one of Sans's attacks.

One day, with Shae leading the way, Shae and Papyrus enter the SHAETALE timeline via a timeline ST!Gaster leaves open by mistake.