Appearance: Underfell sans wears a black hoodie with a white furry hood/collar, black shorts with yellowish-orange stripes, and red and white sneakers. He has a blood red pupil,he is a skeleton, he also has a gold tooth and likes to drink mustard from the bottle,grillbys is a fastfood shop names after its owner, grillby, fell sans always goes to grillbys and likes it there, ell sans also likes puns and makes some occasionaly but they are dark most of the time, fell sans calls his brother "boss"