Pi is Harvey's best friend who is very smart and quite unusual in his own special way. His eyes are never seen because his pork pie hat obscures them and has been described by Sabrina as "totally out of it and really smart at the same time". According to the episode "Upside Down Town", it is implied that Pi is a Chinese accent. He first appears in Danny Phantom's Adventures of Sabrina: The Animated Series, where he would join The Amity Park Adventure Team after Sabrina calls Danny Phantom and his friends to join them after the end of Danny Phantom Goes to FernGully: The Last Rainforest. Pi is voiced by Chantal Strand.