User blog comment:SATOSHISUMI/Grand Magic Games Arc Theories/@comment-72.181.81.32-20140107021718

The spy in Raven Tail was gajeel it was revealed when gajeel was all butt hurt, when he was complaining about not being chosen to be an S class wizard. The masters son Ivan also knew gajeels name when he saw him in the grand magic games. The person who dies is Ultear. Read the Manga all this will make sense...