User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-41.13.36.206-20190820191417/@comment-2601:87:8300:20D0:24E2:6D91:D892:FE18-20190820194919

Maybe Issei will reincarnate  his familiar and it turns into a woman  like Judecca in Trinity seven. That way he can use her like how Sairaorg uses Regulus in the RG.