User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-2208155-20180319175558

Chichigami is a female... WOW..

She instructed Issei to collect 12 Heavenly Breast. Issei currently has 7,(Rias, Akeno, Kuroka, Rosswiese, Asia, Xenovia, and Irina)  who among who have the Heavenly Breast.

We should wait for 5 more females in Issei harem, then?

So,  Baalberith thinks that Issei is his father.... One Vali 2.0(introduced as villain).. Maybe Verrine is 1 of the 12 Heavenly Breast..