User blog comment:DeathGodPrayer/Talk About What You Want!/@comment-4547267-20131218224218/@comment-9339850-20131218224626

if you want to rank them, its basically in order of when they were introduced; Or better yet, when they became a regular character, so Rias, Asia, Akeno, Koneko, Xenovia, Irina, and Ravel so far (Rossweisse isnt formally in the harem yet)