User blog comment:IamJakuhoRaikoben/Chapter 515: I Am You... You Are Me, Review./@comment-117.223.154.228-20161220220753/@comment-5303512-20161221043007

Well it could be that Acnologia wasn't around for Irene when she was a dragon or he just doesn't do anything at that time. As for sent, it could be that Irene's pseudo-human appearance gave her human scent.