Coach Feratu is an unseen character that was mentioned in the episode Big Trouble In Little Sanchez. He was a Vampire who was employed as a gym teacher at Harry Herpson High School. The name Coach Feratu was an alias he used while being around humans. His real vampire name is Balik Alistane. Coach Feratu's last name is taken from the word Nosferatu, which basically means vampire, and was first popularized in works such as Bram Stoker's 1897 novel "Dracula" and the 1922 film "Nosferatu: A Symphony of Horror".