The Demon Slayer was one of the Black Mage's 7 loyal commanders who was swayed by his notion of utopia and dreams of peace and development established by absolute power. After losing his family when the Black mage betrayed him, the Demon Slayer rose against the Black Mage with vengeance in his heart. He was not strong enough to defeat the Black Mage, and was knocked unconscious in the battle. He was later rescued by the Resistance and became a Resistance Warrior to fight against the common foe, the Black Mage.