User blog comment:Iron.Shadow.Dragon/Nine Demon Gates Match-up Predictions/@comment-24016459-20131011204741/@comment-1359322-20131013033515

Yeah kinda thought of that based on FMA, well this idea came since they said Tartaros might be in possession of The Book of Zeref and the non-human like Doriate and Kyouka are merely experiments for the real thing.