User blog comment:IamJakuhoRaikoben/Chapter 355: Song of the Fairies, Review./@comment-6299840-20131011225313/@comment-5580383-20131012204536

Uh, it's actually implied several times that she's also a pervert. It's the combination of her shamelessness and closeted perverted side which makes her different from most girls.

Good point though, Erza never had a father or mother to bring up her as opposed to Lucy and others who at least had some family member or  father like figure to bring them up.

Erza never killed anyone canonically( Azuma doesn't count considering he turned into a tree ) and the guards she beat up were actually killed by Jellal.