User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-32428013-20190812212948

DxD is related exactly to Ophis. I think AxA will be related to both GR and Ophis. AxA, BxB, CxC, DxD, ExE. It is just a learning alphabet with Issei :D. AxA will be perhaps the basis of Issei's power as a GR's and Ophis' child. In the matter of ExE I think it will be related exactly to Great Red. ???? can be the new God of Hell or someone from ExE world.