User blog comment:IamJakuhoRaikoben/Chapter 346: The Law of Retrogression, Review./@comment-5840892-20130802184631/@comment-7418318-20130802200321

My sympathy for her started when she was shown all beaten up by Ivan.

That got me thinking that she might only have been cruel to Lucy because it's the only way she has to vent her frustration about being mistreated.... which seems to be the case since her personality changed pretty drastically now that she's free of Raven Tail.