User blog comment:IamJakuhoRaikoben/Chapter 443: And Then, The Land Was No More, Review./@comment-76.121.234.236-20150706084119/@comment-26416024-20150706143936

As 0FairyTail0 said, Natsu himself is E.N.D. However, it was his powers and memories that were sealed in the Book of E.N.D. However I do think the bandage is E.N.D. related.