User blog comment:B214/Shin DxD 1 discussion/@comment-95.210.189.106-20180701103434/@comment-2601:8C:601:5692:C954:FEAC:43CE:2E97-20180702181212

Don't know about her being connected to Mitsuya, but there some untranslated stuff after the title reveal that I think might be referring to those connected to him.