User blog comment:MarineroLelouch/Power Ranking and Classes./@comment-3290324-20140211014255/@comment-188.81.155.51-20140211234514

It was stated that Mirajane was known by Fiore as Demon and because she was powerful she and her brother had special missions to slay monsters. She had some lost like Azura but she wasnt focus on battle because Lisanna was dangerous and she would be killed again.