Board Thread:General Discussion/@comment-24027950-20131009221928/@comment-3445779-20131010002401

I was under the impression that Midas's spirit was inside the coffin (seeing that in chapter 185 the coffin was vibrating shortly before Midas manifested behind Athena during her fight with Hayate), of course the coffin holding the power of royalty is an interesting theory, but just adding this, in the opening pages of volume 21, it is shown that the coffin was destroyed in the aftermath/during Ikusa's fight with Midas. So its a possibility that Yukariko took the power of royalty from the remnants of the coffin after Athena and Ikusa had left.

Other then that, You have a very interesting theory, almost the exact same as mine.