The Maou Army's Strongest Magician Was a Human

Ike is known as "the strongest magician in the demon king's army" and is a single-handedly conquering fortresses. The way he mowed down the enemies with his immense magic is truly a ""monster"" that makes him feared by both allies and foes alike. However, he had a secret that he could not tell other demons. "--I'm actually human." Aiming for a coexistence between demons and humans while the leader of demon's army is hiding the fact that he is actually a human!? (Source: Happinet)