Knell

He is a demon in the resistance. He is also a bit of a pervert meeting Nora after contemplating a way to peep in at the girls at a poolhouse. Igunisu Magia has no effect on him at one point he was an officer in the fire brigade of the Dark Liege Army. In the Fourth Volume he has revealed that he has the power to turn any dead demon into his familiar spirit explaining why his familiar spirits really have no will of their own. So far only two of his familiar spirits have been revealed Asto and Jeek. From battling with Nora and Kazuma the first time Knell039s weaknesses seem to be Aqua Magia and females. source: Wikipedia