User blog comment:FairyRaven/Fairy Tail Chapter 360:The White Inheritance, Review and Commentary/@comment-1359322-20131115104132/@comment-7418318-20131115105015

Considering that they are surrounded by water, I'd be surprised if Aquarius wouldn't be used in the next chapter.

And it's also a convenient way out. Aquarius could sweep the Demon far away and by the time he makes his way back to the place of battle, the FT members already slipped away with their charges... at least for the time being.

It'd also be a good set-up for Tartarus attacking FT's guild hall directly in the future, if they suspect that the former council members told FT the information they seek, or they suspect FT to shelter the former council members... or are simply pissed off for FTs interference on those two occasions.