Flegetonte

The Second Apostle, the Burning Eye. A powerful Astral sorcerer.

Long ago, he was once close friends with fellow Astrals Albireo and @Azhara. However, the death of the noble Azhara in the great pit beneath Adastria caused a rift in their friendship...
He was one of the only Astrals who did not escape to a different dimension. Instead, he stayed behind to face the Demon King alone. He valiantly fought the Army of Terror, even slaying an Apostle permanently, but was inevitably overwhelmed.
He joined the Demon King’s forces as a replacement Apostle after hearing the truth: the Demon King was traveling across worlds, gathering forces to break free of the cycle of rebirth and destruction caused by the Dimensional Devourer. He was also promised he could see Azhara again beyond the cycle of infinite worlds.
He has a grudge against his fellow Astrals who abandoned the world and left him for dead. He especially hates his former friend Albireo, for their fundamental disagreement over the memory of their mutual friend Adhara.
Having escaped the Demon King War, he is now the head of the Silent Eyes, a cult that “invites” the worthy to be blessed in the name of the Demon King and bring him back to reconquer the continent.
He will be leading the attack on the capital, descending to the bottom of the Great Temple of Light to seal the Earth Guardian. He will escape from there, though.
He will finally be defeated at the Demon King’s castle.