User blog comment:CNBA3/Super Big Theory!/@comment-7418318-20131026210239/@comment-5303512-20131027004123

It wasn't fear inducement, it was never stated that those Nemesis Demons could induce fear, Erza and the others where just afraid as a natural response against such a powerful foe.

Well, if Demon Slaying Magic lives up to it's rep, then no matter how tough the skin is, the ice would still be able to cut right at him.