Emperor Gelmedo

Gelmedo is Magimatic user and emperor of Gelmedo Empire.

Background
Gelmedo was a human until he killed god.

Light Novel
Volume 12: made her first official appearance.

Abilities
He killed god and took his divine powers, he was more powerful than all the demon lords in the series. All of the Magimatic Soul were originally part of the god's power, strong enough to overcome all demon lords, the emperor could not wield that power indefinitely.