ヘルダルフ

Heldalf is the Lord of Calamity in Tales of Zestiria who serves as the primary antagonist and final boss of the game. Formerly a human named Georg Heldalf, he is now the most powerful hellion and only seeks to create more malevolence and hellions by initiating a war between Hyland and Rolance.

(Source: Aselia the Tales of Wikia)