User blog comment:B214/Question & Answers 5/@comment-82.199.205.164-20160228084829/@comment-24098614-20160228115137

She had a strong suspicion that he had a Sacred Gear inside of him I don't know why either but it brought the question did Rias reincarnate Issei because of his Sacred Gear for his worth or something else because Devils usually rarely reincarnate Humans unless they have something useful to offer them even if their innocent lives are on the line and I don't know if this question has been answered yet.