User blog comment:B214/Volume 21 info & spoilers/@comment-1359322-20160320143546

Vali's new form is also called the Diabolus Dragon.

Now we got the Diabolus Dragon G & Diabolus Dragon L

G for Girl God, L for Lucifer. I think i don't need to point out who's G and who's L.

Looks like a DxD (form) page may have to come soon. ( .__.)