Board Thread:Speculation House/@comment-14138255-20160807005311/@comment-410526-20160905000439

Yeah, Blake going to Vacuo would be a great opportunity to show off the 4 kingdoms, but that's just speculation so far since the other 3 are definitely known to be somewhere. It makes sense for Blake to be there.

Tukson wanted to go to Vacuo to away from the WF, so it seems like it's outside of the WF's sphere of influence. It'd be a good hiding place for Blake if all she plans on doing is hiding (which she might be if only at the start of the Volume).