Horror: Do you wanna head dog? =) Horror!Sans can be associated with the ISTP personality type (Introverted, Sensing, Thinking, Perceiving). ISTPs are less likely to express emotions verbally but still experience feelings internally. They may come across as dishonest, although not necessarily because they are bad people Horror!Sans exhibits peculiar behavior, such as eating items without using his mouth. His chaotic alignment and unpredictable actions make him one of the more psychotic characters in the AU His attire remains similar to Undertale Sans: A blue jacket. Black shorts with white stripes. A white shirt. Instead of slippers, he wears blue tennis shoes12. However, there are distinct differences that set him apart: Skull and Eye: Horror!Sans’s skull bears a large hole on the left side, a result of Undyne throwing a spear at him. His right eye socket features a single big red eyelight, unlike Undertale Sans’s two white eyelights. The crack on the right side of his skull reveals the eerie interior within. His shirt, much like his existence, is stained with blood