Jade: Daughter of Alan Scott, the first Green Lantern of Earth, Jennie Lyn Hayden posesses a birthmark that exudes the powers of the Starheart, the mystical emerald energy  that resides within the ring of Sentinel.  With the death of Kyle Rayner, she has joined the JLA as Earth's latest Green Lantern.

Sentinel: in 1939, Alan Scott was an average train engineer  testing a new bridge when the it exploded.  everyone died but Alan.  The green lamp from the train protected Alan and the flame spoke to him.  telling him to fashion a ring from the green lamp.  Drobing himself in red and green he became the Green Lantern.  After recent events, that caused him to regain his lost powers, and decelerated his aging, he's once again picked up the tights calling himself Sentinel.

Warrior: The original replacement for Hal Jordan, Guy Gardner suffered a serious accident while trying to rescue a bus full of children from a collapsing bridge.  Bypassed by John Stewart, Gardner eventually came into his own years later, proving himself time and again in the Justice League as Earth's Green Lantern.  Now, after the deaths of Kyle Rayner and Hal Jordan, warrior wields the yellow ring of Sinestro, though his heart remains true to the  Green Lantern Corps.