Menas Noah

About

Former last boss and former 13th emperor of the Noah Empire. He plans to conquer the world using his power to create monsters. He is a young man with silver hair and purple eyes. With his ability to create monsters, he created an army of monsters and terrorized the world. The strongest final boss in RPG history figures out a way to get super rich in his own world! Demon Lord Menas, the ruler of the Noa Empire, finds the Resistance's forces on his doorstep.

(Source: THE WORLD OF ISEKAI Wiki)