Kozu

General Kozu is the general of The Overlord's Stone Army. He made his debut appearance fighting the Serpentine in The Day Ninjago Stood Still although he had no lines. He makes his most notable and major appearance in The Island of Darkness.

Background
General Kozu was first seen translating the Stone Warrior language for Lord Garmadon. He was later advised to pursue the ninja, after Lord Garmadon had spotted Zane with the falcon. He does manages to snare the ninja in a stalemate, but at the end, the ninja follow Zane's escape plan and successfully manage to escape. At some point, Cuso gathers the Stone Warriors with their vehicles and chase after the ninja, but fortunately, the power drill that Dr. Julien actualized is capable of digging under the vehicles, thus allowing them to escape again.

Kozu and the Stone Army proceed to halt the ninja from climbing the mountain. However, Kai discovers that the power drill had a special notability, where Nya had secretly stored a large red robot inside power drill. Using this to their advantage, Kai succeeds in fending off the Stone Warriors long enough for the ninja to reach the Temple of Light.

After reaching the Temple, General Kuzu soon realizes that the ninja have earned their pure elemental powers, and retreats desperately with his army from the dragon that Lloyd had created with his new powers.

Trivia

 * Kozu bears a strong resemblance to the Giant Stone Warrior.