Board Thread:Questions and Answers/@comment-68.58.149.38-20151028025807/@comment-25942629-20151226141800

The problem is that he is turning into an angel, not a demon. Since he is contracted wtih Asuramaru, he may be an angel using the power of a demon. Mirai is using an angel's power, but Kureto used a demon to try and possess her in order to control her.