Four Evil Kings

Four Evil Royals (四邪王族, Yonjaōzoku) are the four demons in Dilhaide who were proud of the power behind Anos in the Mythical Age. Each of them reigned as "Blaze Death King, "Dark King", Curse King", and "Scarlet Monument King".

History
The Curse King, the Blaze Death King, the Scarlet Monument King, and the Hades King had powers following the Demon King of Tyranny in the demon world 2,000 years ago. In awe and respect for their abilities, the demons called them the Four Evil Royals.