User blog comment:B214/Volume 22 spoilers/@comment-187.195.231.221-20160727171101/@comment-27083298-20160727172229

Ophis and Lilith are going to remain hidden and they can't enter Kuoh Academy.

And Kunou has a crush on Issei and Ophis sees him as her first true friend and holds him dearly and I'm not sure about Lilith expect the part that she has a interest in him and wants to see him.