User blog comment:FairyRaven/Fairy Tail Chapter 357: The Nine Demon Gates, Review and Commentary/@comment-112.198.64.42-20131027143318/@comment-112.198.64.42-20131027145650

It was merely a suggestion that E.N.D.'s appearance could be based from the Lord of Terror or the Prime Evil Diablo. I pictured him as a very fierce and terrifying foe of Fairy Tail.