User blog comment:Derax-Pagani/Chapter 502 Review/@comment-4507125-20160919082509/@comment-84.197.239.101-20160922201510

Natsu is already a Demon. he's not a Demon in Human body, he's just a Demon.

He may have been Human long ago, before he died as a child, but now he's just a Demon.

An Etherious Form may be possible. We will see eventually if he has one or not.