User blog comment:Omega natsu2/Chapter 364: Tartarus Arc, Part 1: Immorality and Sinners, Predictions./@comment-1693281-20131206165948/@comment-7418318-20131206183910

Actually just the word "venting" was enough to get the meaning. But considering that Kagura believed what she heard from Ultear (otherwise she wouldn't have put Archenemy away again) I don't think Kagura would want to do that.

No idea about Milliana though. She might just have been too baffled to do anything.