User blog comment:FrankieX98/The future members of the Issei's harem and peerage./@comment-2601:584:C400:82A0:C861:CFB9:7C8:845C-20181206200804/@comment-37165251-20181207212926

Vali and Lavinia would be nice...if Tobio is not against^^

For Issey I am not shure. He has an reincarnated Angel (Irina), one Youkai (Kunou), two Youkai-Devil Hybrids (Shirone and Kuroka), a Devil/half-goddess (Rossweisse), a Royal blooded Devil (Ingvild Leviathan), twoPureblood Devil (Rias and Ravel), a Vampire (if Elmenhilde is in the Harem), a reincarnated half-Fallen Angel (Akeno), two reincarnated Devils (Xenovia, Asia) and maybe a Human if LeFay comes in....

Nearly too much for one^^

I think a pureblooded Fallen would fit...