User blog comment:B214/Volume 22 spoilers/@comment-88.139.172.140-20160803142239/@comment-24.113.252.213-20160804021736

That would be such an epic twist if Bina Lessthan (Issei's mysterious Masked Queen) was actually the Original Lilith.

Imagine, when Lilith reveals herself to be Issei's Queen, and if (huge "if") she decides to officially join his peerage, Vali flips out saying, "You're going after my great-grandmother now?!"

Or....maybe she is just a decendant of Lilith (she could have had another child with a different Devil). But still, imagine the reactions.