TerrorRune at this point is muuuuch more different then I planned out.
At first it sold be like horrortale but noooooo I decided to fuck around and pretty much make the au an apocalypse setting. So this au is either TerrorRune or DeltaApocalypse.
So anyway here is sans and papyrus.
Some info on both of them:
Sans is full on infected but had his arms torn off and is pretty much tied up as papyrus doesn't want to kill him, Sans is nearly feral and animalistic but remembers a few things like his brother, he is capable of limited speak though and usually just blurts out puns time from time.
Papyrus though is wearing ahazmat suit and is very germaphobic and would rather eat just uncooked pasta for some odd reason, he also just drags his brother around so he doesn't get in 'trouble'.