User blog comment:Jopjopjop/SlashDog/@comment-16281343-20150310100954/@comment-73.178.133.185-20150310204555

Okay, some corrections and new information: I'm not certain about this, but if I'm not wrong they broke off from Grauzauberer or its parent organization several years ago
 * Tobio's grandmother, Ageha, is one of Himejma Suou's older sisters. Unless I misunderstood, she was exiled from the Himejima clan decades ago and was last known as Ikuse Ageha (幾瀬朱芭).
 * Akeno's mother, Shuri, was the elder sister of Suzaku's mother, and their grandmother was another older sister of Suou.
 * Thus, Suou is Tobio's, Akeno's, and Suzaku's granduncle/great uncle. Hence, Ōoji-sama (大伯父さま)*.
 * It's "Wizards of Oz", plural. This is a group of magicians who created their own magical realm, "Oz", in the Dimensional Gap using unique barrier techniques (結界術 kekkai-jutsu).