Heavenly Father God Nousgalia

He is the Heavenly Father, the god that creates order, and the father of all gods.

[Spoiler] Two thousand years ago, Nosgalia informed the Great Spirit Reno that she was chosen to birth the Child of God, but she rejected his plan and attacked him. Though he was able to restrain Reno momentarily with her own magic, she was saved by the Demon King Anos and his right-hand man, Shin Reglia. [/Spoiler]

(Source: Maou Gakuin Wiki)