Old Maou descendants

Despite being a powerful brainwashing technique, it was not functioning properly… What a weird story. Rossweisse-san continued.

“The magic was a God-class’ one. It is ancient Olympus magic. The one who abducted her must be one of the rulers of Hell, who is Olympus’ primordial God. As for the why the magic didn’t function properly, probably, the power that Ingvild was born with…the demonic power of the descendant of the Maou Leviathan resists it. My opinion is that even God-class magic won’t be able to affect the demonic power of Maou’s descendants easily.”

True DxD Volume 1, Life 3