General Sirox is the ambitious and cunning leader of a Saber Tooth army division. While he battles Laval and the heroes, he schemes to overthrow Sir Fangar and take over the tribe for himself. He is trying to form a secret alliance with the Ice Bears, many of whom resent Fangar for leaving them in the ice for so long. His plan is to wait for victory over the heroes and then imprison Fangar. Even his few friends know not to turn their back on Sirox.
According to his bio in LEGO.com, he wants to overthrow Sir Fangar and become the leader of the Hunters.