As the name implies, Sans is shown as very insane, incapable of feeling love and empathy towards others. when killing a monster he decapates and skewers them to show a sense of victory. Sans is so insane that he will attack anything, from loud noises to insects to movement and anything that can potentially hurt him. However, Sans will not do this while battling his victims, giving full concentration to them. Sans has a weak body, but endless energy. His pals Are Dust/Murder, Horror, And Killer.