User blog comment:FairyRaven/Fairy Tail Chapter 391: Gray vs. Silver, Review and Commentary/@comment-87.112.175.111-20140704214036/@comment-24.177.95.45-20140705055444

I think it is so he could move around easier. Him calling himself Deliora would probably draw too much attention to him for like the reason NoNickNeeded stated and people not on his get list coming to get revenge like the people who with Lyon on the island. He could easily take care of them but it would be a pain and in the way of mission and objective. On top of Hiro not wanting to spoiler with calling Deliora.