User blog comment:Crimson and Darkness/DxD Updates 2~/@comment-27083298-20190823164737/@comment-155.93.250.141-20191026054537

Well if you remember when Lady Phenex teased Ravel about being engaged, she was in denial and I think we all by now the one defining personality trait both Issei and Ravel possess is extreme stubborness, but in all fairness so do some of the others, the point is it was teased back in Volume 24, but put aside to make some space for some of those who came before Ravel, e.g. Shirone, Kuroka, Rossweisse, etc. Then came Ingvild, Yasaka and Kunou. When you think about Ravel only returned and joined the main cast around Volume 10, which is later than all the above, so really its not much of a surprise that it's taken this long