User blog comment:B214/Question and Answers 2/@comment-187.209.0.247-20140320210259/@comment-1359322-20140321153403

I'm kinda doubtful that Asia can even get any character development at this point, for Rias, Akeno and Koneko, we can at least expect to see power-up from them. Asia, not so much, she's useless in fight, her being a member of "Issei's currently unofficial harem" is easily overshadowed by other girls.

Though if you ask me at this point, it'll be more interesting to have something like this, Rias-Akeno Volume and Asia-Koneko Volume.