Sans the Skeleton is a guy who loves to make puns and because of this Papyrus is scared of him. Early in the series, Sans took Papyrus home and dressed him up in multiple cringe outfits. He has a collection of photos of Papyrus. He also liked him before, Frisk the Human thought that in the episode he debut in, he thinks Papyrus attacked him.
Sans is bald which is complimented by a hoodie. he has plain white eyes and is made out of bones. The outfit he is most seen in is a light blue hoodie and some black pants. When at Grillby's he wears the same outfit.