User blog comment:B214/Volume 22 spoilers/@comment-30924344-20170128052407/@comment-30924344-20170128061709

@B214 Yeah thats true actually but still Bina will be focused on too.

@Alcahona Issei is fighting Dulio and I hope the girl that is chosen is Ravel. She's only been on 1 cover;  volume 14. I also want Elmenhilde to be on the cover.

@B214 Asia is the next girl he confesses to as she is the second heroine. Also about charactrrs I had mentioned on Ishibumis blog he mentioned an older sister character approaching Issei but that cant be Bina.