She has an absolute hatred for rich snobs or people who think they're better than everyone. Plus she could sorta sense that Haruka's bitch of an ex was making Mira feel bad intentionally. 

*hugs Mira-chan* "Let 'em run their mouths all they want. In the end, arrogance shall give them nothing...."

Psh! Now you're starting to sound like your ancestor. XD

"What?" O_o

Nothing! ^_^;