The master of Mt. Paouz and the final enemy Son Goku Jr has to fight in Dragonball GT: Hero's Legacy.
Demon Lord Yao has been master of Mt. Paouz for some unknown of time in from GT to the actual time that "Hero's Legacy"; most likely around when the Ox King or ChiChi left the place. It is also unknown if he is an actual demon, let alone a "Demon King" as the title has been use by others before; but it can be said he is master, as the 3 "demons" that fought with Goku, Pack, and Goku's 2 bear friends were afraid of the giant purple boar.
Yao is powerful and violent, not afraid to hurt his underlings in attempts to kill Goku the 2 bears. He also looks down at everyone, using his strength and power to do what he pleases. His actions pushed the young 1/5th Sayian to become a Super Sayian, where he actually felt defeat.
With his massive size, Yao has strength beyond normal human standards. He also has the ability to change his hands and arms into anything he wants, like a cannon, roots, a mace, and a sword. He can also fire Ki-Blasts from his snout. His power level is unknown but it took SSJ Goku Jr. to take him out after he was about to kill the bear that was friends with the boy.
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