Pis is David's friend and classmate, always naked and almost always urinating. He seems effortlessly good at whatever he sets his mind to, although he doesn't lord it over David. Before he met David, Pis used to be in a delinquent gang and was known as the "Yellow Devil". He is similar in appearance to the Belgian Manneken Pis sculpture. Pis's real name is Julian and his family is apparently related to the Belgian royal family.