User blog comment:B214/High School DxD DX.4 discussion/@comment-30924344-20170721201027/@comment-2601:8C:601:5692:3D30:770C:CE5:1085-20170725144152

@animesuki_users, I never said that authors can't make mistakes. I'm a Star Wars fan and there's a certain novel trilogy where the author retcons certain material in the first volume only to reference the original material rather than his retcon in the second volume. I was just stating that it could have just as easily been a miss on the TLs side (or a fail in our collective memory) that we needed to double check before we continue to bash Ishibumi over it. For that, thank you Gary29 for going to the trouble of comfirming that it's all Ishibumi.

Also, my theory that the Saji siblings are under the guardianship of their grandmother is still valid, and IMO fits the information the best, since Ishibumi went as far as to mention their grandfather's death the previous year. It's rather common for orphans to be cared for by grandparents if they are alive and able enough unless there's an adult sibling (especially in Japanese media). Plus it's a simple retcon in order to add grand to mother.