Azazel Uchiha

Azazel Uchiha was the King of Tethaiala, the father of Zero Uchiha, and the husband to Reiss Uchiha. He had an army of several dragons, young to ancient, in his service.

History
Azazel was cold and distant as a father to Zero, focusing on his work and on running the kingdom. Azazel had been working in private to hone his dragon abilities, including the Sharingan. He found the way to obtain the Mangekyou Sharingan without rejecting the dragon form; by killing one you love. In order to achieve this goal, Azazel murdered his wife, an action that seemed to trouble him until his death.

Zero Uchiha left the kingdom shortly after this, and thus Azazel began to spend all of his time researching Aincrad, Kalru, and Tiamat. He had aspirations to become a god and rule over Faerun. During this time, he amassed an army of dragons, which came to Tethaiala and ran out the vast majority of the inhabitants of the city.

Death
Azazel was finally confronted by his son, Zero, on the Sword Mountains. It was there they had their final battle. Zero utilized an Orb of Dragonkind, given to him by Kalru Uchiha, to enhance his dragon form and match Azazel's power. After a long, grueling fight, Zero was able to defeat his father once and for all.

Zero took Azazel back to Tethaiala, to the family crypts under the castle. It was there Zero laid the body of his father to rest, next to the tomb of Reiss Uchiha.

Aetherius, the Dragon Slayer
This artifact appears as a staff until it is activated, forming an ethereal axe blade at the head of the staff.