Huitlapacti

Huitlapacti is cousin by marriage to the king of the Nahuatla Tribe, Moctapotl. His wife is Tlapatla.

Prior to Savage Empire, the insane Dr. Spector had made him invulnerable, and it became easy for him to put the shaman Oaxtepec into prison and force his cousin to flee, usurping power in the tribe. He turned into a bloodthirsty dictator, hated and feared by the people.

When the Avatar tried to talk with him (after permission from Dr. Spector), it became clear very quick that Huitlapacti was not only cruel and bloodthirsty, but also rather stupid. This combination made the Avatar decided to better leave, before one wrong word would mean a nasty end.

After the invulnerability-field was shut down with the destruction of Kotl, the furious people of the tribe lynched him, enabling Moctapotl to return to power.

Trivia

 * He is really dangerous. Asking him about his job, he decides to call the guards to kill the Avatar on the spot.