User blog comment:Xhatefate/DxD Updates~/@comment-30924344-20170301025441/@comment-30924344-20170301101119

So as it stands for how many covers a female or male character featured has been on one, this is the tally:

Rias=6 covers Asia=4 covers Xenovia=3 covers Irina=2 covers Rossweisse=2 covers Ophis=2 covers Issei=2 covers Ravel=2 covers Kunou=1 cover Koneko=1 cover Grayfia=1 cover Gasper=1 cover Sona=1 cover Serafall=1 cover Vali=1 cover Tannin=1 cover Rassei=1 cover