User blog comment:JCgamer18/Brave Frontier Theory/@comment-36.78.2.199-20151127065531/@comment-180.217.7.58-20151129125538

Acording to Code: Tri:

The battle maidens, the SBS units, Nick, Jack, and bonnie comes from the same realm, which is puzzle trooper's realm. I am not sure what other GL exclusives come from the realm as the wiki is no longer active.

Fei, Fang and Xie Jing comes from a diffrent realm. It is stated that the Divine Blades and the Creator Blade comes from there.

Xenon, Estia, Grandit and Elena comes from a realm between Grand Gaia and Puzzle trooper's realm. It should be the reason why Dregar targeted the realm first.