User blog comment:Yuri Rozu/Fairy Tail Chapter 502 Mavis and Zera/@comment-62.113.28.119-20160924094005/@comment-62.113.28.119-20160924185847

I'm sure that she has experience with demon-related diseases, but still, it probably will be something END related, although Porlyusica doesn't know anything about END, it would be stupid if she suddenly said "Natsu will become a demon".