User blog comment:DeathGodPrayer/Talk About What You Want!/@comment-98.77.244.134-20121006052401/@comment-60.53.100.113-20121006112026

I think the best Ravel could get is the 5th or 6th spot. The 1st to 4th spot has been "officially" taken.

1st - Rias, 2nd - Asia, 3rd - Akeno, 4th - Koneko.

Also about the Issei's Harem categories i read the story 4 times and i don't remember Rossweisse, Irina and Ophis being added in his Harem. Well not sure to count Xenovia or not.