Sans

"'Wanna have a MAD Time?!'" Sans is the main protagonist/secondary antagonist of Dusttale after the player kept on resetting over and over again, doing Genocide, Sans decided he would gain LV by killing monsters in the Underground to stop them.

Appearance
Murder!Sans, is very similar to his Undertale counterpart. However, his left pupil is cyan encircled by red and the right one is only red, which stands for he lost the yellow of justice but gained the red of determination. His eyes can change to white or empty.

Personality
Before the human arrived in the Underground, Sans was more of a lazy and friendly skeleton who would often make jokes. He would go to Grillby's for a good amount of time; he was very caring about his brother, Papyrus. However, after the human reset and did numerous Genocide Routes, one day due to unknown circumstances Sans suddenly remembered all the Genocide Routes. This changed Sans, and made him kill other monsters for LV; even going as far as killing his own brother. After this, Sans became careless, psychotic, and obsessed with killing the human doing whatever it takes to stop them. Despite being extremely careless, Sans does seem to regret killing Papyrus.

Sans's Themes

 * The Murder (Official theme)
 * STMPWSFY
 * Mad Time
 * Reality Check Through the Skull

Trivia

 * Sans can sometimes be mistaken to be the main antagonist of Dusttale. However, the player takes the spot as the main antagonist.
 * He’s rationally insane.
 * There is no official ending to Dusttale (at the moment).
 * He puts the hood on because he doesn’t want to show himself to others. There is also a reason to prevent dust from splashing on his face.