They are a 15-year-old, human Non-Binary teenager, who wears a colorful scarf, and wears a purple sweater, with darker-purple stripes across it. They wear shorts, with long underwear, and reddish-brown boots, to match with their brown hair. They also have yellowish skin. Their siblings are Asriel and Chara. Their nicknames are Frisk "Biscuit" Dreemurr, "Brisket", or just "Biscuits". They are at LV 11. Their height is 5'1 or 5'2.