A Gravity Bender is a Human with the ability to manipulate their center of gravity or the gravity around them. They are apparently a very rare group of humanoids with few actually known and fewer seen.
Gravity Benders possess the ability to manipulate their center of gravity and the gravity around them. This allows the Bender the ability to climb sheer rock faces and jump great distances and heights with ease. They can also cling to surfaces with ease. There is no stated link between them and Heavy Worlders.
The only known Gravity Bender seen in the show is Kulis Bara, whose skills earned him the title "Winged Warrior".