User blog comment:IamJakuhoRaikoben/Chapter 495: I'm Hungry As Hell, Review./@comment-7418318-20160726072457/@comment-27337151-20160726081503

I think zeta is a thought form which Mavis has created subconsciously that is why Mavis doesn't have to think to maintain zera in her state. Mavis doesn't even remember her, but her subconscious mind does.