Well I think Erza all ready knows that jellal loves her.But,gray and natsu,to me, think of Erza like big sister.Remember when during the tower of heaven natsu a dit he looked up to her. So in a way natsu kind of a dit it. With gray I am not sure,but he feel some type of way. Gray had a weird reaction when Erza was bitten par Crobra's snake.
