Grackle the Chia Bomber is the leader of the Chia Bombers. They were part of the third wave of opponents in the Tyrannian Invasion plot. After the plot they moved on to pillaging small Tyrannian towns.
Grackle is the only one of many Chia Bombers that were fought throughout the Tyrannian Invasion plot, and in Chia Bomber 2 with a name.