User blog comment:IamJakuhoRaikoben/Chapter 470: The Hybrid Theory, Review./@comment-27674224-20160126181825/@comment-1776824-20160129231236

It's confirmed now that Invel is not a Dragon Slayer, as Acnologia said that there were seven dragon slayers left until he has annihilated all traces of dragon. Whatever Invel is, it has to be something so that Gray doesn't counter him and utterly ruin what remote bits of interesting characterization he currently has.