User blog comment:B214/Question and Answers 2/@comment-24098614-20140309233634/@comment-1359322-20140310023155

Here: "“Will Kunou and other girls that have appeared become Ise’s servant?”

Those girls who are not allowed to become a devil due to their position probably won’t. Kunou is the princess of the youkai faction in the Kyoto. There is no way that she can become a devil."