User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-73.46.6.122-20150727175623/@comment-1359322-20150728031810

"The only high level devils who can do that to me are Buchou and Akeno-san. Both of them take turns at taking out my dragon powers."

- Volume 3

So Rias and Akeno take turns but Rias wasn't shown.

Second, the attraction power of the Extinguish Star is the effect of taking in Ise's Dragon power.