This novel tells of an anti-hero family under the Suzuki/Itoh lineage, and one of them is a demon lord and the story how they protect their world from diablo's champion, which is demons opposition race who try to sabotage the worlds and multiverse.
This story is not meant to be sensitive to the religious or spiritual side. This meant to be entertainment, which means there is now real person background in reality. If so, coincidence.
Plus, the MC is supposed to be in both gender ( which is female lead included). And another reminder, vol. 1 was made script-like writing.
I hope you understand and enjoy my creation.