User blog comment:B214/Question and Answers 4/@comment-24502975-20141102214513/@comment-24502975-20141103002724

Okay, thanks for clearing up the commoners part. But about Rias, no one altered her magic circle, she was kissing Ise at the time and accidentally teleported to the Gremory Palace instead of the clubroom because her emotions were high. So that's why I think the 72 Pillars' teleportation magic-circles are made of purely demonic power.