User blog comment:Bige1218/Fairy Tail Strongest Characters (2016)/@comment-136.63.38.203-20160627200919/@comment-24592308-20160627215804

Because Lucy has various Star Dresses aside from summoning the Celestial Spirit King, makes her powerful; Gray, has defeated several powerful opponents such as Tempester and Mard Geer Tartaros, and is said to be as strong as Base X792 Natsu.