User blog comment:KnocknickKnock/Celestial combination attacks with Lucy"s 10 zodiac keys./@comment-3424593-20140310043620/@comment-5598380-20140310225535

Lucy run away from home to be a full-time mage. When she joined FT, she was still a rookie mage. Natsu and the others were already mages when they were still kids unlike Lucy.