User blog comment:B214/Question and Answers 4/@comment-24502975-20141102214513/@comment-24421137-20141102225126

Ok ok I got what you are saying. I can't really say for all the time, but in the instance that we are using it was definitely magic in the circle, during teleportation. I believe magic is used for teleportation only and demonic energy is used for attacks and defense and even barriers, as shown with the barrier Akeno had made during Xenovia and Irina's match with Issei and Kiba, for demons by the way not for magicians.