Pheles

Pheles is a lord who once loved and still loves a human, Johan. In order to be able to be with him forever, together they created the most precious treasure in Guze, a Treasure that can grant eternity to the Mystes bearing it: the Reiji Maigo. Due to the Reiji Maigo, she doesn't have to consume other humans' power of existence; she can get enough to survive from Johan without him being in danger of disappearing.