User blog comment:B214/Question and Answers 4/@comment-24502975-20141102214513/@comment-120.161.1.248-20141103002434

@gary The low class are not from 72 pillars, they are just commoners. The symbol in teleportation circle are probably exclusive for the 72 pillars. Rias made a mistake because she was not focus while using teleportation skill so someone was able to alter the formula in her teleportation circle. That's why i believe there is a formula involved when using teleportation skill but it also consumes some of the demonic power.