User blog comment:Crimson and Darkness/Shin DxD 4 discussion/@comment-73.10.61.229-20200221000942/@comment-73.10.61.229-20200221021022

I have no proof but I just realized a simple explanation the Multiverse. The Sefaira in DxD is human while the Sefaira in ExE is a spirit or god. That's why they have the same last names.