User blog comment:Miskos3/Fairy Tail 522 & 523: Gray's Trump Card & Is Destiny Burning, Review/@comment-4933386-20170220013827/@comment-4829046-20170220062620

That WAS Obra.

Good question though. Then again, he only served as a sort of informant for Zeref and kinda added into the joke that Raven Tail was full of double-agents. :D

It brings up the question whether he was a private demon/creation of Zeref's or a tool of the Alvarez empire like with Eileen's lackeys and the machina. Could just be a reject like the Tartaros cyclops bird as well.