Ok first off,My scanner Hates me,so please ignore the bottom >>'
I dont know whhhhy it done that,but oh wellz.

Okie!Yup!The one on the left is the real Roxy!^^
Uhm.She pictured/pictures herself as a whiny Spoiled Child.
Thats why she's changing that.The first thing that pops into my head of what they could be fighting about is this.

Mirror Roxy:Why did you hurt her!You know this is'nt what you wanted!You love mother!
Roxy:Not as much as I love Al!Leave me alone!
Mirror Roxy:But Mother and Father Love you!
Roxy:That snake couldent care less about me!And Mother get's beaten because I look more like Kabuto than Orochimaru!
Mirror Roxy:But your not!Yami has white-
Roxy:Yes I am.Yami is a monster,Not a human!
Mirror Roxy:She cares!Mother and Father and Kabuto-san!
Roxy:*Laughs*Same Old me eh?Craving people to care and look at you!No wonder your so worked up about this!
Mirror Roxy:Thats not it!!!
Roxy:Sure it isn't..Sure.*laughs*

Random but seriously.Thats What i think they WOULD be fighting about.
I bet Al woulda freaked if he walked in and Roxy was talking to a mirror. ._.