Green Man is a character appearing in media published by DC Comics, primarily as a member of the Green Lantern Corps. He first appeared in Green Lantern #164 in May 1983, and was created by writer Todd Klein and artist Dave Gibbons.
Green Man as depicted in Green Lantern Corps: Recharge #2 (December 2005). Art by Patrick Gleason.
Green Man (right), with his partner Stel, from Green Lantern Corps: Recharge #4 (February 2006). Art by Patrick Gleason and Prentis Rollins.
The Green Lantern Corps is a fictional intergalactic law enforcement agency and superhero team appearing in comics published by DC Comics. They patrol the farthest reaches of the DC Universe at the behest of the Guardians, a race of immortals residing on the planet Oa. According to DC continuity, the Green Lantern Corps have been in existence for three billion years. Currently operating amongst the 3600 "sectors" of the universe, there are 7204 members. Each Green Lantern is given a power ring, a weapon granting the use of incredible abilities that are directed by the wearer's own willpower.
The Green Lantern Corps. Art by Phil Jimenez (penciler and inks), Tom McCraw (colorist)