User blog:SageSlayer/Why does Erza treat Natsu differently than others?

I saw this topic of discussion from lurking on both reddit and mangahelpers. Compare how Erza was blushing towards Natsu when he defeated Ikusatsunagi in the Avatar arc. But why did she scold Gray for preventing Natsu to do something reckless? Why does it seem that Erza treats Natsu differently than others from Team Natsu? Looking forward to comments :D.