ST Stands for sanity, Sans had to kill Papyrus in order to survive, but he hasn't killed anyone else. he didn't learn about timelines and all the other stuff, he's basically a clueless Sans in a world where nothing makes sense. He still wants to kill the H U M A N.
Aude-Javel For DUSTTRUST Based on Ari's sprites. @RevolvingSoul for Sans sprite im still working on it