Jonathan Stone, also known by the codename "Herc," is a U.S. Air Force pilot who later became the officer in charge of Edwards Air Force Base. In this position he acted as a mentor to Hal Jordan, who would go on to become the super-hero Green Lantern. He was close friends with Hal's father Martin Jordan in a group called the "Four Musketeers" along with Carl Ferris and Ken Arden. Jonathan Stone was created by Geoff Johns and Carlos Pacheco, first appearing in Green Lantern (Volume 4) #2. (2005)