User blog comment:Miskos3/Fairy Tail Episode 234: Tartarus arc Prologue: The Nine Demon Gates, Review/@comment-4933386-20150523124945/@comment-69.117.248.150-20150525155155

I was saying that Silver probably made a Deliora casing around himself, making it seem like that was his demon form. When he was talking to Gray, Silver said that he was Deliora. I know that it was a lie, but it could be true that Silver's demon form is Deliora