User blog comment:FairyRaven/Fairy Tail Chapter 399: Wings of Despair, Review and Commentary/@comment-24277053-20140908195929/@comment-7418318-20140908200500

It was never shown. She might have been at a friend's place when the guild was hit. Hopefully that place was in the part of Magnolia that Plutogrim didn't mow down...

Or she might have been in the guild, in which case she's most likely with Porlyuscia and the wounded.