User blog comment:IamJakuhoRaikoben/Chapter 439: Albareth Empire, Review./@comment-24277053-20150609162442/@comment-5303512-20150609182313

True it would suck, but there is more to my prediction, what if inside Lumen Histoire is an actual almighty Fairy in the form of Mavis, he then absorbs Lumen Histoire and becomes an all powerful Fairy as well.

It ties to my latest theory of the truth of Zeira from FT0, she is not an illusion or a hallucination, but she is a Fairy in the form of Zeira that wanted to keep Mavis happy.