User blog comment:Wrath022/Chapter 516: The Truth About Enchantment, Review/@comment-7418318-20161228072929/@comment-7418318-20161228114039

I agree, though I don't mind the taking over of the body all that much... but the circumstances were not optimal to say the least.

It'd have been better if Irene defeated Wendy and Erza, but in her excitement of having found a new "vessel" she doesn't check to make sure Erza is really dead and just leaves with Wendy, probably bringing her back to Fairy Tail's guild hall (speaking of that... I wonder how Zeref views the whole issue). Maybe transform her into a cute and helples animal to make sure she can't fight back and is easier to carry and then turn her back into Human at their destination.

And only at the guild, she would do something lengthly to either attempt or succeed in the transfer of her consciousness.