Soren

Soren was an earthbender who mastered the elusive skill of crystalbending, first a Marshal of the Earth Kingdom before rightfully gaining possession of King Ravic's throne upon his death at the Battle of Ba Sing Se. Despite knowing that constructing his nation from the ground up (literally, as the only mainland Earth Kingdom settlement still remaining in their control was the Crystal Abyss) would be an extremely difficult task, Soren immediately began to raise his army in retaliation and defense of the last major city held by the Earth Kingdom.