User blog comment:FairyRaven/Fairy Tail Chapter 421: Wendy and Chelia, Review and Commentary/@comment-24039250-20150224014538/@comment-7418318-20150224093257

My theory for Asuka is that the anime-team didn't pay attention.

In the manga there is no interaction between Asuka and Mavis and neither is Asuka ever shown to react to anything that Mavis does.